Sample Question Papers Enzymes Biology Fsc CBSE Ncrt Neet
QUESTIONS AND MCQS SAMPLE PAPERS FSC AND ALL EXAMS
CHAPTER NO 3 THE ENZYMES SAMPLE PAPERS FOR EXAMS OF BOARD
MCQs ANS SHORT QUESTIONS SAMPLE PAPERS 2020
TOP (10) QUESTIONS ANS SAMPLE PAPERS FOR FINAL EXAMS
HERE ARE TEN (10) BIOLOGY QUESTIONS AND SAMPLE PAPERS FOR THE FINAL AND MOCK TEST PREPARATION CHAPTER NO 3 NAMED: ENZYMES" BOOK PUBNJAB BOOK BOARD LAHORE TEXTBOOK. EVERY ONE CAN copy HERE TEST AND SAMPLE PAPERS FOR CLASS AND STUDENTS PREPARATIONS ABOUT BIOLOGY SUBJECT
 |
| chapter 3 enzymes paper sample |
TOTAL MARKS:60-MCQS=2-MARKS-SHORT-20=40 MARKS
MCQs.SELECT THE RIGHT ONE (1)
1.In-organic
ions are:
a)
Inhibitor b) Activator c) Cofactor d) All of them
2.Chemically,
vitamins are__________
a)
Inhibitor b) Coenzyme c) Cofactor d) All of them
3.Optimum
pH for sucrase is:
a)
2.50 b) 3.50 c) 4.50 d) 5.50
4.Slight
change in pH can change the _________of amino acids at active site.
a)
Nature b) Ionization c) Energy d) None of them
5.The substance which reacts with an to be converted into a product is:
a)
Inhibitor b) Coenzyme c) Substrate d) All of them
6.If
more substrate to an already occurring enzymatic reaction is added, more enzyme
activity is seen
because:
a)
There is probably more enzyme
available than there is a substrate
b)
There is probably more substrate
present then there is an enzyme.
c)
There is probably more product present
then their in either substrate
or enzyme.
d)
None of
them
7.Induced
fit Model was proposed in:
a)
1859 b) 1959 c) 1869 d) 1969
8.According
to _________active site is not a rigid structure.
a)
Lock and Key Model b) Induced Fit model c) Both a & b d) None of them
9.Enzymes
have _______structure of__________
a)
Fibrous, protein b) Globular, protein c) Both a & b d) None of them
10.Enzymes
are the most important group of___________.
a)
Lipids b) Carbohydrates c) Proteins d) All of them
11.Active
form of the enzyme is:
a)
Pepsin b) Pepsinogen c) Both a & b d) None of them
12.The
charge and _______of the active site is formed by amino acids.
a)
Structure b) Polarity c) Shape d) Activity of the reaction
13.Inhibitors
have _______types.
a) 1
b) 2 c) 3 d) 4
14.Lock
and key model was proposed in:
a)
1790 b) 1880 c) 1890 d) 1899
15.Inhibitors
having structural similarity with a substrate.
a)
Non-competitive b) Competitive c) Both a & b d) None of them
16.Binding
site and ________are the parts of active site.
a)
Coenzyme b) Apoenzyme c) Holoenzyme d) Catalytic site
17. An activated enzyme can also be called as:
a)
Coenzyme b) Apoenzyme c) Holoenzyme d) All of them
18.Enzymes
are very sensitive to a minor change in:
a)
Water Concentration b) Product Concentration c) Substrate Concentration d) All
of them
19.who
proposed Lock and Key model?
a)
Koshland b) Franklin c) Meischer d) None of them
20.Optimum
pH for chymotrypsin is:
a)
3-6 b) 6-9 c) 7-8 d) 2-4
II) Write short answers to these questions:
1.write
a few lines between coenzyme and prosthetic group?
2.Define
inhibitors. Give examples.
3.whatis catalysis? Define the complex.
4.Define
inhibitors of an enzyme?
5. How
you can define an active site?
6. What
are reversible reactions?
7. Give
the formula of succinic acid. Is it competitive or non-competitive inhibitor?
8. What
is the difference between irreversible and reversible reaction?
9. How
pepsinogen works?
10. Why
enzymes are specific in nature?
11. What
are the lock and key model?
12. What
do you know about apoenzyme?
13.Name
the factors affecting the activity of enzymes.
14. What
do you know about holoenzyme?
15. What
are irreversible inhibitors?
16. What
is the difference between the lock and key model and Induced fit model?
17. How
low and high temperatures affect enzyme activity?
18. What
is the difference between competitive and non-competitive inhibitors?
19.List
two conditions that destroy enzymatic activity by disrupting bonds between the
atoms in an enzyme.
20. What
is cofactor? Define activator
Sample Question Papers Enzymes Biology Fsc CBSE Ncrt Neet
QUESTIONS AND MCQS SAMPLE PAPERS FSC AND ALL EXAMS
CHAPTER NO 3 THE ENZYMES SAMPLE PAPERS FOR EXAMS OF BOARD
MCQs ANS SHORT QUESTIONS SAMPLE PAPERS 2020
TOP (10) QUESTIONS ANS SAMPLE PAPERS FOR FINAL EXAMS
TOTAL MARKS:60-MCQS=2-MARKS-SHORT-20=40 MARKS
MCQs.SELECT THE RIGHT ONE (2)
1. The substance which reacts with the enzyme to be converted into a product is:
a)
Inhibitor b) Coenzyme c) Substrate d) All of them
2.Enzymes
are the most important group of___________.
a)
Lipids b) Carbohydrates c) Proteins d) All of them
3.Mechanism
of enzyme action is called:
a)
Chemical Reaction b) Catalysis c) Both a & b d) None of them
4.Enzyme
without a prosthetic group is:
a)
Coenzyme b) Apoenzyme c) Holoenzyme d) All of them
5.Optimum
pH for sucrase is:
a)
2.50 b) 3.50 c) 4.50 d) 5.50
6. An activated enzyme can also be called as:
a)
Coenzyme b) Apoenzyme c) Holoenzyme d) All of them
7.The
catalytic site is restricted to __________
a)
Active site b) Catalytic site c) Both a & b d) None of them
8.The ACTIVE site consisting of only a few amino acids, while resting of the bulk of the
amino acids maintain the:
a)
Chemical Activity b) Rate of chemical reaction c) globular structure d) All of
them
9.Optimum
pH for arginase is:
a)
6.70 b) 9.70 c) 5.5 d) None of them
10.Optimum
pH for enterokinase is:
a)
3.50 b) 4.50 c) 5.50 d) 6.50
11.Enzymes
have _______structure of__________
a)
Fibrous, protein b) Globular, protein c) Both a & b d) None of them
12.Inhibitors
having structural similarity with the substrate
a)
Non-competitive b) Competitive c) Both a & b d) None of them
13.Sometimes
co-factor provides a source of _________energy to derive reactions.
a)
Kinetic b) Mechanical c) Chemical d) None of them
14.Chemically,
vitamins are__________
a)
Inhibitor b) Coenzyme c) Cofactor d) All of them
15.Irreversible
inhibitors check the reaction rate by:
a)
Occupying the active sites b) Destroying the globular structure c) Both a &
b d) None of them
16.Optimum
pH for chymotrypsin is:
a)
3-6 b) 6-9 c) 7-8 d) 2-4
17. Who
proposed Induced Fit Model?
a)
Fisher b) Koshland c) Franklin d) None of them
18.Active
form of the enzyme is:
a)
Pepsin b) Pepsinogen c) Both a & b d) None of them
19.Non-protein
part of the enzyme is:
a)
Inhibitor b) Activator c) Co-factor d) Active site
20._________is
not the example of an inhibitor
a)
Cyanides b) Drugs c) Hormones d) Antibiotics
II) Write short answers to these questions: 40 Marks
1. Give
the formula of succinic acid. Is it competitive or non-competitive inhibitor?
2. What
do you know about apoenzyme?
3.Define
inhibitors of the enzyme?
4.Define
inhibitors. Give examples.
5. What
are non-competitive inhibitors?
6. What
is the difference between the lock and key model and Induced fit model?
7. What
are competitive inhibitors?
8. How
enzyme succinic dehydrogenase works?
9.Name
the factors affecting the activity of enzymes.
10. How
different enzymes act in a series of chemical reactions?
11. How
does an enzyme accelerate a metabolic reaction?
12. Give
the formula for malonic acid. Is it competitive or non-competitive inhibitor?
13. What
are irreversible inhibitors?
14. What
is the difference between competitive and non-competitive inhibitors?
15. How
you can define enzymes?
16. How
pepsinogen works?
17. What
do you know about holoenzyme?
18. How
change in temperature can affect the rate of enzyme action?
19.MOST
OF THE ENZYMES NOT FLOAT IN CYTOPLASM WHY?
20. What is the difference between the prosthetic group and coenzyme?
Sample Question Papers Enzymes Biology Fsc CBSE Ncrt Neet
QUESTIONS AND MCQS SAMPLE PAPERS FSC AND ALL EXAMS
CHAPTER NO 3 THE ENZYMES SAMPLE PAPERS FOR EXAMS OF BOARD
MCQs ANS SHORT QUESTIONS SAMPLE PAPERS 2020
TOP (10) QUESTIONS ANS SAMPLE PAPERS FOR FINAL EXAMS
TOTAL MARKS:60-MCQS=2-MARKS-SHORT-20=40 MARKS
MCQs.SELECT THE RIGHT ONE (3)
1.Binding site and ________are the parts of active site.
a) Coenzyme b) Apoenzyme c) Holoenzyme d) Catalytic site
2. an activated form of an enzyme
a) Pepsin b) Pepsinogen c) Both a & b d) None of them
3.Sometimes co-factor provides a source of _________energy to derive reactions.
a) Kinetic b) Mechanical c) Chemical d) None of them
4. Inhibitors having structural similarity with the substrate.
a) Non-competitive b) Competitive c) Both a & b d) None of them
5. Increase in enzyme concentration increases the:
a) Catalytic activity b) Number of active sites c) Rate of formation of product d) All of them
6.ES complex activates the___________:
a) Catalytic site b) Binding site c) Product d) None of them
7.Many enzymes are simple______________
a) Present in nucleus b) Dissolved in cytoplasm c) Dissolved in water d) None of them
8.Enzymes are highly _________
a) Active b) Selective c) Specific d) None of them
9. Optimum pH for chymotrypsin is:
a) 3-6 b) 6-9 c) 7-8 d) 2-4
10. Who proposed the Induced Fit Model?
a) Fisher b) Koshland c) Franklin d) None of them
11.According to _________active site is not a rigid structure.
a) Lock and Key Model b) Induced Fit model c) Both a & b d) None of them
12.The rate of an enzyme-catalyzed reaction:
a) Is constant under all conditions
b) Decrease as substrate concentration increase
c) Can not be measured
d) Can be reduced by inhibitors
13. Co-enzyme is attached with the enzymes by:
a) Covalently b) Loosely attached c) Both a & b d) None of them
14.Optimum pH for sucrase is:
a) 2.50 b) 3.50 c) 4.50 d) 5.50
15. If more substrate to an already occurring enzymatic reaction is added, more enzyme activity is seen because:
a) There is probably more enzyme available than there is the substrate
b) There is probably more substrate present than there is an enzyme.
c) There is probably more product present than their in either substrate or enzyme.
d) None of them
16.Anti-metabolites are__________of enzymes.
a) Activator b) Inhibitor c) Co-enzyme d) None of them
17. Enzymes are very sensitive to even a minor change in:
a) pH b) Temperature c) Substrate d) All of them
18. The catalytic activity is restricted to a small portion known as:
a) Substrate b) Coenzyme c) Active site d) All of them
19. Enzyme without a prosthetic group is:
a) Coenzyme b) Apoenzyme c) Holoenzyme d) All of them
20.The charge and _______of the active site is formed by amino acids.
a) Structure b) Polarity c) Shape d) Activity of the reaction
II) Write short answers to these questions:
1. What is cofactor? Define activator.
2. What are irreversible inhibitors?
3. What are non-competitive inhibitors?
4. What is the difference between the lock and key model and Induced fit model?
5. How low and high temperatures affect enzyme activity?
6. What are pepsinogen and pepsin?
7.DISCUSS BRIEFLY ENZYME SPECIFICITY
8. What is the difference between irreversible and reversible reaction?
9. Give three characteristics of enzymes.
10. What is the difference between competitive and non-competitive inhibitors?
11. How you can differentiate between apoenzyme and holoenzyme?
12. How a change in temperature can affect the rate of enzyme action?
13. How pepsinogen works?
14. How you can define enzymes?
15. How you can define an active site? How it works?
16. What is the difference between the prosthetic group and coenzyme?
17. What are competitive inhibitors?
18. What is the optimum pH? Give examples
19. Name the factors affecting the activity of enzymes.
20. How does an enzyme accelerate a metabolic reaction?
Sample Question Papers Enzymes Biology Fsc CBSE Ncrt Neet
QUESTIONS AND MCQS SAMPLE PAPERS FSC AND ALL EXAMS
CHAPTER NO 3 THE ENZYMES SAMPLE PAPERS FOR EXAMS OF BOARD
MCQs ANS SHORT QUESTIONS SAMPLE PAPERS 2020
TOP (10) QUESTIONS ANS SAMPLE PAPERS FOR FINAL EXAMS
TOTAL MARKS:60-MCQS=2-MARKS-SHORT-20=40 MARKS
MCQs.SELECT THE RIGHT ONE (4TH)
1. Lock and key model was proposed in:
a) 1790 b) 1880 c) 1890 d) 1899
2. The substance which reacts with an enzyme to be converted into a product is:
a) Inhibitor b) Coenzyme c) Substrate d) All of them
3. An activated enzyme can also be called as:
a) Coenzyme b) Apoenzyme c) Holoenzyme d) All of them
4. If more substrate to an already occurring enzymatic reaction is added, more enzyme activity is seen
because:
a) There is probably more enzyme available than there is substrate
b) There is probably more substrate present than there is an enzyme.
c) There is probably more product present than their in either substrate or enzyme.
d) None of them
5.The rate of enzyme-catalyzed reactions:
a) Is constant under all conditions
b) Decrease as substrate concentration increase
c) Can not be measured
d) Can be reduced by inhibitors
6.Enzymes lower the activation energy of the____________
a) Reactants b) Reactions c) Product d) ES complex
7. Recognition of the substrate is the responsibility of:
a) Catalytic site b) Binding site c) Both a & b d) None of them
8.Chemically, vitamins are__________
a) Inhibitor b) Coenzyme c) Cofactor d) All of them
9.Many enzymes are simple______________
a) Present in nucleus b) Dissolved in cytoplasm c) Dissolved in water d) None of them
10. Non-protein part of the enzyme is:
a) Inhibitor b) Activator c) Co-factor d) Active site
11.Binding site and ________are the parts of active site.
a) Coenzyme b) Apoenzyme c) Holoenzyme d) Catalytic site
12.Optimum pH for salivary amylase is:
a) 4.80 b) 6.80 c) 8.80 d) 10.80
13. Optimum pH for pancreatic Lipase is:
a) 5.00 b) 7.00 c) 9.00 d) None of them
14.The charge and _______of the active site is formed by amino acids.
a) Structure b) Polarity c) Shape d) Activity of the reaction
15.Anti-metabolites are__________of enzymes.
a) Activator b) Inhibitor c) Co-enzyme d) None of them
16.Inhibitors have _______types.
a) 1 b) 2 c) 3 d) 4
17.Rate of enzyme action is __________at optimum temperature.
a) Minimum b) Maximum c) Moderate d) None of them
18. Enzymes are very sensitive to even a minor change in:
a) pH b) Temperature c) Substrate d) All of them
19.Optimum pH for catalase is:
a) 4.60 b) 5.60 c) 7.60 d) 9
20.The optimum temperature for human body is_________
a) 34 °C b) 37 °C c) 41°C d) None of them
II) Write short answers to these questions:
1. How you can differentiate between apoenzyme and holoenzyme?
2. Give three characteristics of enzymes.
3. What are reversible reactions?
4. How you can define an active site? How it works?
5. Define inhibitors. Give examples.
6. What are non-competitive inhibitors?
7. What is catalysis? Define the ES complex.
8. Give the formula of succinic acid. Is it competitive or non-competitive
inhibitor?
9. How different enzymes act in a series of chemical reactions?
10. How low and high temperatures affect enzyme activity?
11. What is the difference between irreversible and reversible reaction?
12. What is the optimum pH? Give examples
13. How the change in pH can affect the rate of enzyme action?
14. What are irreversible inhibitors?
15. What are pepsinogen and pepsin?
16. Name the factors affecting the activity of enzymes.
17. What do you know about apoenzyme?
18.GIVE THE NAMES OF FOUR FACTORS AFFECTING RATE OF ENZYME
REACTION
19. How a change in temperature can affect the rate of enzyme action?
20. Define inhibitors of an enzyme?
Sample Question Papers Enzymes Biology Fsc CBSE Ncrt Neet
QUESTIONS AND MCQS SAMPLE PAPERS FSC AND ALL EXAMS
CHAPTER NO 3 THE ENZYMES SAMPLE PAPERS FOR EXAMS OF BOARD
MCQs ANS SHORT QUESTIONS SAMPLE PAPERS 2020
TOP (10) QUESTIONS ANS SAMPLE PAPERS FOR FINAL EXAMS
TOTAL MARKS:60-MCQS=2-MARKS-SHORT-20=40 MARKS
MCQs.SELECT THE RIGHT ONE(5TH)
1.The
vitamins are the essential raw material for the synthesis of:
a)
Activators b) Co-factor c) Co-enzymes d) Prosthetic group
2.According
to lock and key model, the active site is _________ :
a)
Soft structure b) Flexible structure c) Attractive structure d) Rigid Structure
3.Optimum
pH for surcase is:
a)
3.50 b) 4.50 c) 5.50 d) 6.50
4.The
product of succinic acid by the action of the enzyme is:
a)
Fumaric acid b) Malonic acid c) Citric acid d) Pyruvic acid
5. Optimum a pH of pepsin is:
a)
2.00 b) 4.50 c) 5.50 d) 6.80
6.The
optimum pH of pancreatic lipase is:
a)
6.0 b) 7.0 c) 8.0 d) 9.0
7. A coenzyme is closely related to:
a)
An ion b) Polypeptide c) Apoenzyme d) Vitamins
8.The
optimum pH of Salivary amylase is:
a)
8.80 b) 6.80 c) 4.80 d) 2.80
9.If
the co-factor is loosely attached to the protein part, it is known as:
a)
Co-enzymes b) Aponezyme c) Holoenzyme d) Activator
10.A polypeptide chain and co-factors
COLLECTIVELY is known as:
a)
Apoenzyme b) Holoenzyme c) Co-enzyme d) Prosthetic group
11. The optimum temperature of human body enzymes is:
a)
b) c) d)
12.Extreme
change in pH causes the bonds in enzyme to break resulting in the:
a)
Activation of Enzyme b) Inhibition of Enzyme c) Denaturation of Enzyme d) None
of these
13.The
enzyme with optimum pH = 7.60 is:
a)
Arginase b) Enterokinase c) Catalase d) Surcase
14.Optimum
pH for the proper functioning of enzyme sucrase is:
a)
2.00 b) 4.50 c) 5.50 d) 7.60
15.If
the non-protein part of Enzyme is covalently bonded then it is called:
a)
Prosthetic group b)Co-enzyme c) Activator d)Co-factor
16. If the non-protein part is covalently bonded to the enzyme is called as:
a)
Co-enzyme b) Prosthetic c) Activator d) Apoenzyme
17.Reversible
inhibitors form Weak linkage with the:
a)
Enzyme b) Reactant c) Product d) Substrate
18.The
optimum pH of Enterokinase is:
a)
1.50 b) 3.50 c) 5.50 d) 7.50
19. The catalytic activity of the enzyme is restricted to a small portion of the enzyme, known
as:
a)
Active site b) Catalytic site c) Binding site d) Reacting site
20.The
optimum pH for enzyme arginase is:
a)
2.00 b) 9.50 c) 7.60 d) 9.70
II) Write short answers to these questions:
1. What
is the role of pH value on enzyme action?
2. Why
enzymes are denatured at high temperature?
3.In
what way, substrate concentration affect the rate of reaction?
4.Define
inhibitor with an example?
5. What
do you mean by inducED a fit model of enzyme action?
6. How
does High-temperature effect Enzyme activities?
7. What
do you know about lock and key model?
8. What
is an active site of an enzyme?
9. Write
a note on"Active Site" of an Enzyme?
10. What
is meant by inhibitors of Enzymes?
11. Compare
pepsin with pepsinogen?
12.Define
enzyme inhibitors. Give its two types?
13. What
is Induced Fit Model of an enzyme?
14. Give
difference between the prosthetic group and activator?
15. What
is the optimum temperature for the enzyme?
16.Differentiate
between Apoenzyme & Holoenzyme?
17. Give
the concept of induced a fit model of enzyme action?
18. Write
down four characteristics of enzymes?
19.State
lock and key model?
20. What
is the difference between pepsin and pepsinogen?
Sample Question Papers Enzymes Biology Fsc CBSE Ncrt Neet
QUESTIONS AND MCQS SAMPLE PAPERS FSC AND ALL EXAMS
CHAPTER NO 3 THE ENZYMES SAMPLE PAPERS FOR EXAMS OF BOARD
MCQs ANS SHORT QUESTIONS SAMPLE PAPERS 2020
TOP (10) QUESTIONS ANS SAMPLE PAPERS FOR FINAL EXAMS
TOTAL MARKS:60-MCQS=2-MARKS-SHORT-20=40 MARKS
MCQs.SELECT THE RIGHT ONE (6TH)
1.Optimum
pH for pancreatic lipase is:
a)
8.00 b) 7.00 c) 9.00 d) 6.00
2.Induce the fit model was prepared by:
a)
Koshland b) Emil Fischer c) Sanger d) Meischer
3. Who
discovered enzyme for the first time
a)
daniel Koshland b) email Fischer c) Wilhelm Kuhne d) William Harvey
4.Optimum
pH for surcase is:
a)
3.50 b) 4.50 c) 5.50 d) 6.50
5.According
to lock and key model the active site is:
a)
Rigid structure b) Flexible c) Liquid d) All of the above
6.An
activated enzyme consisting of the polypeptide chain and co-factors is known as:
a)
Apoenzyme b) Holoenzyme c) Co-enzyme d) Prosthetic group
7.In
an enzyme molecule, if the non-protein part is covalently bonded, it is called:
a)
Co-enzyme b) Apo-enzyme c) Holo-enzyme d) Prosthetic group
8.The
product of succinic acid by the action of the enzyme is:
a)
Fumaric acid b) Malonic acid c) Citric acid d) Pyruvic acid
9.The
optimum pH of pepsin is:
a)
2.00 b) 4.00 c) 6.00 d) 8.00
10.According
to lock and key model, the active site is _________ :
a)
Soft structure b) Flexible structure c) Attractive structure d) Rigid Structure
11. Which
one is the essential raw material for coenzymes?
a)
Proteins b) Vitamins c) Carbohydrates d) Lipids
12.Optimum
pH for enzyme pepsin is:
a)
2 b) 6.80 c) 7 d) 9
13.Optimum
pH for the proper functioning of enzyme sucrase is:
a)
2.00 b) 4.50 c) 5.50 d) 7.60
14.Lock
and key model was proposed by:
a)
Emil Fisher b) Koshland c) Rudolph Virchow d) Lorenz Oken
15. The optimum temperature of human body enzymes is:
a)
b) c) d)
16.An
activated enzyme consisting of polypeptide chain and cofactor is called:
a)
Apoenzyme b) Activator c) Holoenzyme d) Inhibitor
17.The
enzyme with optimum pH = 7.60 is:
a)
Arginase b) Enterokinase c) Catalase d) Surcase
18.Enzymes
reduces the energy of activation by three methods .which is not included in
enzymes mode of action
a)
by altering the shape of substrate b)
changing the orientation of substrate c)
by disrupting the charge distribution d) decreasing the temperature of enzymes
19.Enzyme
lowers down the energy of:
a)
Kinetic b) Potential c) Activation d) Ionic
20.The
vitamins are the essential raw material for the synthesis of:
a)
Activators b) Co-factor c) Co-enzymes d) Prosthetic group
II) Write short answers to these questions:
1. What
is meant by co-factor?
2. Define the active site of the enzyme and write only names of its two sites?
3. What
is an active site? Describe its two parts?
4. How
extreme changes in pH affect enzymes?
5.Differentiate
between irreversible and reversible inhibitors?
6.Define
optimum temperature, give the optimum temperature of human?
7. What
are non-competitive inhibitors?
8. Write
a note on"Active Site" of an Enzyme?
9. Write
down four characteristics of enzymes?
10. Define the active site of enzymes?
11.State
the effect of change in pH on the activity of an enzyme?
12.Differentiate
between Apoenzyme & Holoenzyme?
13.In
what way, substrate concentration affect the rate of reaction?
14. Give
difference between the prosthetic group and activator?
15. Give
effect of pH on enzyme action?
16. Give
the concept of induced a fit model of enzyme action?
17.Define
inhibitor with an example?
18. How
does High-temperature effect Enzyme activities?
19. How
many regions are present in active site?
20. What
are co-factors? Give their role
Sample Question Papers Enzymes Biology Fsc CBSE Ncrt Neet
QUESTIONS AND MCQS SAMPLE PAPERS FSC AND ALL EXAMS
CHAPTER NO 3 THE ENZYMES SAMPLE PAPERS FOR EXAMS OF BOARD
MCQs ANS SHORT QUESTIONS SAMPLE PAPERS 2020
TOP (10) QUESTIONS ANS SAMPLE PAPERS FOR FINAL EXAMS
TOTAL MARKS:60-MCQS=2-MARKS-SHORT-20=40 MARKS
MCQs.SELECT THE RIGHT ONE (7th)
1.Enzymes
lower the activation energy of the____________
a)
Reactants b) Reactions c) Product d) ES complex
2.The
catalytic activity is restricted to a small portion known as:
a)
Substrate b) Coenzyme c) Active site d) All of them
3.According
to _________active site is not a rigid structure.
a)
Lock and Key Model b) Induced Fit model c) Both a & b d) None of them
4.Non-protein
part of the enzyme is:
a)
Inhibitor b) Activator c) Co-factor d) Active site
5.The
optimum temperature for human body is_________
a)
34 °C b) 37 °C c) 41°C d) None of them
6.Active
form of the enzyme is:
a)
Pepsin b) Pepsinogen c) Both a & b d) None of them
7._________is
not the example of an inhibitor
a)
Cyanides b) Drugs c) Hormones d) Antibiotics
8.Inhibitors
having structural similarity with the substrate.
a)
Non-competitive b) Competitive c) Both a & b d) None of them
9._______amount
of the enzyme can accelerate the chemical reaction.
a)
Very High b) High c) Small d) Moderate
10.In-organic
ions are:
a)
Inhibitor b) Activator c) Cofactor d) All of them
11. Who
proposed Induced Fit Model?
a)
Fisher b) Koshland c) Franklin d) None of them
12.The
charge and _______of the active site is formed by amino acids.
a)
Structure b) Polarity c) Shape d) Activity of the reaction
13. Which
statement about enzyme is not true?
a)
They consist of proteins, with or
without a non-protein part
b)
The change in the rate of
catalyzed reaction
c)
They are sensitive
to heat
d)
They are non-specific in
their action.
14.Co-enzyme
is attached with the enzymes by:
a)
Covalently b) Loosely attached c) Both a & b d) None of them
15.Induced
fit Model was proposed in:
a)
1859 b) 1959 c) 1869 d) 1969
16.Recognition
of the substrate is the responsibility of:
a)
Catalytic site b) Binding site c) Both a & b d) None of them
17.Enzymes
involved in protein synthesis is an integral part of:
a)
Cell b) Golgi apparatus c) Ribosomes d) Cytoplasm
18. The active site consisting of only a few amino acids, while the rest of the bulk of the
amino acids maintains
the:
a)
Chemical Activity b) Rate of chemical reaction c) globular structure d) All of
them
19.Optimum
pH for arginase is:
a)
6.70 b) 9.70 c) 5.5 d) None of them
20.Anti-metabolites
are__________of enzymes.
a)
Activator b) Inhibitor c) Co-enzyme d) None of them
II) Write short answers to these questions:
1.Name
the factors affecting the activity of enzymes.
2. What
do you know about holoenzyme?
3. What
is meant by a factor?
4. What
are non-competitive inhibitors?
5.WHy
most of the enzymes do not float in cytoplasm .discuss briefly
6. How
change in pH can affect the rate of enzyme action?
7. What
is a prosthetic group?
8. How
does an enzyme accelerate a metabolic reaction?
9. Give
three characteristics of enzymes.
10. How
you can define an active site?
11. Why
enzymes are specific in nature?
12.Define
inhibitors. Give examples.
13. What
are reversible reactions?
14. What
are competitive inhibitors?
15. What
are pepsinogen and pepsin?
16. What
is the difference between irreversible and reversible reaction?
17. How
you can differentiate between apoenzyme and holoenzyme?
18. What
is the difference between competitive and non-competitive inhibitors?
19.List
two conditions that destroy enzymatic activity by disrupting bonds between the
atoms in an enzyme.
20. How
enzyme succinic dehydrogenase works
Sample Question Papers Enzymes Biology Fsc CBSE Ncrt Neet
QUESTIONS AND MCQS SAMPLE PAPERS FSC AND ALL EXAMS
CHAPTER NO 3 THE ENZYMES SAMPLE PAPERS FOR EXAMS OF BOARD
MCQs ANS SHORT QUESTIONS SAMPLE PAPERS 2020
TOP (10) QUESTIONS ANS SAMPLE PAPERS FOR FINAL EXAMS
TOTAL MARKS:60-MCQS=2-MARKS-SHORT-20=40 MARKS
MCQs.SELECT THE RIGHT ONE(8th)
1.Inhibitors
have _______types.
a) 1 b) 2 c)
3 d) 4
2.The active
site of an enzyme:
a) Never changes
b) Forms no
chemical bond with
substrate
c)
Determines, by its structure, the specificity of the enzyme
d) Looks
like a lump projecting from the surface of an enzyme
3.Active
form of the enzyme is:
a) Pepsin b)
Pepsinogen c) Both a & b d) None of them
4.Optimum pH
for pancreatic Lipase is:
a) 5.00 b)
7.00 c) 9.00 d) None of them
5. The substance which reacts with an enzyme to be converted into a product is:
a) Inhibitor
b) Coenzyme c) Substrate d) All of them
6. An activated enzyme can also be called as:
a) Coenzyme
b) Apoenzyme c) Holoenzyme d) All of them
7.Optimum pH
for pepsin is:
a) 3.00 b)
2.00 c) 1.00 d) None of them
8. Which
statement about enzyme is not true?
a) They
consist of proteins, with or without a
non-protein part
b) The
change the rate of catalyzed
reaction
c) They are sensitive to
heat
d) They are
non-specific in their
action.
9.Enzymes
are the most important group of___________.
a) Lipids b)
Carbohydrates c) Proteins d) All of them
10.Enzymes
involved in protein synthesis is an integral part of:
a) Cell b)
Golgi apparatus c) Ribosomes d) Cytoplasm
11.Optimum
pH for chymotrypsin is:
a) 3-6 b)
6-9 c) 7-8 d) 2-4
12.To some
extent rate of enzyme action is _____ proportional to enzyme concentration.
a) Inversely
b) Directly c) Equal d) All of them
13. Who
proposed Lock and Key model?
a) Koshland
b) Franklin c) Meischer d) None of them
14.Optimum
pH for arginase is:
a) 6.70 b)
9.70 c) 5.5 d) None of them
15._______amount
of the enzyme can accelerate the chemical reaction.
a) Very High
b) High c) Small d) Moderate
16.In-organic
ions are:
a) Inhibitor
b) Activator c) Cofactor d) All of them
17.Optimum
pH for enterokinase is:
a) 3.50 b)
4.50 c) 5.50 d) 6.50
18.Rate of
enzyme action is __________at optimum temperature.
a) Minimum
b) Maximum c) Moderate d) None of them
19.According
to _________active site is not a rigid structure.
a) Lock and
Key Model b) Induced Fit model c) Both a & b d) None of them
20.Heat
supplies _______energy to molecules of the reactions.
a) Kinetic
b) Potential c) Mechanical d) None of them
II) Write short answers to these questions:
1.How low
and high temperatures affect enzyme activity?
2.What is
induced-fit model?
3. How
different enzymes act in a series of chemical reactions?
4.How a
co-factor works?
5. How
enzymes reduce the energy of activation?
6. How you
can define an active site?
7.What do
you know about apoenzyme?
8.How change
in temperature can affect the rate of enzyme action?
9. What is a
prosthetic group?
10. What is
cofactor? Define activator.
11. How you
can define enzymes?
12. What are
competitive inhibitors?
13. How you
can differentiate between apoenzyme and holoenzyme?
14. How you
can define an active site? How it works?
15. Where
enzymes are found in the cell?
16.What is
the difference between competitive and non-competitive inhibitors?
17. What is the
difference between the prosthetic group and coenzyme?
18.Define
inhibitors. Give examples.
19. What are
pepsinogen and pepsin?
20. What do
you know about holoenzyme?
Sample Question Papers Enzymes Biology Fsc CBSE Ncrt Neet
QUESTIONS AND MCQS SAMPLE PAPERS FSC AND ALL EXAMS
CHAPTER NO 3 THE ENZYMES SAMPLE PAPERS FOR EXAMS OF BOARD
MCQs ANS SHORT QUESTIONS SAMPLE PAPERS 2020
TOP (10) QUESTIONS ANS SAMPLE PAPERS FOR FINAL EXAMS
TOTAL MARKS:60-MCQS=2-MARKS-SHORT-20=40 MARKS
MCQs.SELECT THE RIGHT ONE(9th)
1. Enzymes have
_______structure of__________
a) Fibrous,
protein b) Globular, protein c) Both a & b d) None of them
2. If more the substrate to an already occurring enzymatic reaction is added, more enzyme
activity is seen because:
a) There is
probably more
enzyme
available than there is a substrate
b) There is
probably more
substrate
present then there is an enzyme.
c) There is
probably more product present than
their in either substrate or
enzyme.
d) None of them
3.According to
_________active site is not a rigid structure.
a) Lock and
Key Model b) Induced Fit model c) Both a & b d) None of them
4.Enzymes
lower the activation energy of the____________
a) Reactants
b) Reactions c) Product d) ES complex
5.The
catalytic activity is restricted to a small portion known as:
a) Substrate
b) Coenzyme c) Active site d) All of them
6.Optimum pH
for pancreatic Lipase is:
a) 5.00 b)
7.00 c) 9.00 d) None of them
7. Pepsin can
digest:
a) Lipid b)
Carbohydrate c) Protein d) All of them
8.Irreversible
inhibitors check the reaction rate by:
a) Occupying
the active sites b) Destroying the globular structure c) Both a & b d) None
of them
9. Who proposed
Lock and Key model?
a) Koshland b)
Franklin c) Meischer d) None of them
10.The active a site consisting of only a few amino acids, while resting of the bulk of the amino
acids maintain the:
a) Chemical
Activity b) Rate of chemical reaction c) globular structure d) All of them
11.Inhibitors
having structural similarity with the substrate.
a)
Non-competitive b) Competitive c) Both a & b d) None of them
12.Anti-metabolites
are__________of enzymes.
a) Activator
b) Inhibitor c) Co-enzyme d) None of them
13. Which
statement about enzyme is not true?
a) They
consist of proteins, with or without a
non-protein part
b) The change
the rate of catalyzed
reaction
c) They are sensitive to
heat
d) They are
non-specific in their
action.
14.Many
enzymes are simple______________
a) Present in
nucleus b) Dissolved in cytoplasm c) Dissolved in water d) None of them
15. Induced fit The model was proposed in:
a) 1859 b)
1959 c) 1869 d) 1969
16.Optimum pH
for sucrase is:
a) 2.50 b)
3.50 c) 4.50 d) 5.50
17.The
catalytic site is restricted to __________
a) Active site
b) Catalytic site c) Both a & b d) None of them
18.Optimum pH
for pepsin is:
a) 3.00 b)
2.00 c) 1.00 d) None of them
19.Slight
change in pH can change the _________of amino acids at active site.
a) Nature b)
Ionization c) Energy d) None of them
20.The optimum
temperature for human body is_________
a) 34 °C b) 37
°C c) 41°C d) None of them
II) Write short answers to these questions:
1. What is the induced, fit model?
2. How
pepsinogen works?
3. What is the
difference between the prosthetic group and coenzyme?
4. What are
irreversible inhibitors?
5. Where
enzymes are found in the cell?
6. What is
catalysis? Define the ES complex.
7. How does an
enzyme accelerate a metabolic reaction?
8. What is
meant by a factor?
9. How you can
differentiate between apoenzyme and holoenzyme?
10. How the enzyme
succinic dehydrogenase works?
11. How
different enzymes act in a series of chemical reactions?
12. What is the
difference between irreversible and reversible reaction?
13. How you can
define an active site?
14. What are
non-competitive inhibitors?
15. What do you
know about apoenzyme?
16. How the change
in pH can affect the rate of enzyme action?
17.Define
cofactor and discuss its role in the chemical reaction
18. Write the
name of four enzymes with their pH
19. What are
competitive inhibitors?
20. What are
pepsinogen and pepsin?
Sample Question Papers Enzymes Biology Fsc CBSE Ncrt Neet
QUESTIONS AND MCQS SAMPLE PAPERS FSC AND ALL EXAMS
CHAPTER NO 3 THE ENZYMES SAMPLE PAPERS FOR EXAMS OF BOARD
MCQs ANS SHORT QUESTIONS SAMPLE PAPERS 2020
TOP (10) QUESTIONS ANS SAMPLE PAPERS FOR FINAL EXAMS
TOTAL MARKS:60-MCQS=2-MARKS-SHORT-20=40 MARKS
MCQs.SELECT THE RIGHT ONE(10th)
1.Optimum
pH for enterokinase is:
a)
3.50 b) 4.50 c) 5.50 d) 6.50
2.If
more substrate to an already occurring enzymatic reaction is added, more enzyme
activity is seen because:
a)
There is probably more enzyme
available than there is a substrate
b)
There is probably more substrate
present then there is an enzyme.
c)
There is probably more product present
then they're in either substrate
or enzyme.
d)
None of
them
3.Optimum pH for arginase is:
a)
6.70 b) 9.70 c) 5.5 d) None of them
4.Optimum
pH for pepsin is:
a)
3.00 b) 2.00 c) 1.00 d) None of them
5.Enzymes
are very sensitive to even a minor change in:
a)
pH b) Temperature c) Substrate d) All of them
6. The substance which reacts with the enzyme to be converted into a product is:
a)
Inhibitor b) Coenzyme c) Substrate d) All of them
7.Enzymes
have _______structure of__________
a)
Fibrous, protein b) Globular, protein c) Both a & b d) None of them
8.If
more you add more substrate to already occurring enzymatic reaction and it has
no effect on the rate of
reaction?
What is the form given for this situation?
a)
Denaturation b) Saturation c) Inhibition d) None of them
9.Increase
in enzyme concentration increases the:
a)
Catalytic activity b) Number of active sites c) Rate of formation of product d)
All of them
10.The
charge and _______of the active site is formed by amino acids.
a)
Structure b) Polarity c) Shape d) Activity of the reaction
11.Inhibitors
have _______types.
a) 1
b) 2 c) 3 d) 4
12.Non-protein
part of the enzyme is:
a)
Inhibitor b) Activator c) Co-factor d) Active site
13. The active site consisting of only a few amino acids, while the rest of the bulk of the
amino acids maintain the:
a)
Chemical Activity b) Rate of chemical reaction c) globular structure d) All of
them
14. Who
proposed Lock and Key model?
a)
Koshland b) Franklin c) Meischer d) None of them
15.Many
enzymes are simple______________
a)
Present in nucleus b) Dissolved in cytoplasm c) Dissolved in water d) None of
them
16.Inhibitors
having structural similarity with the substrate.
a)
Non-competitive b) Competitive c) Both a & b d) None of them
17.Enzymes
lower the activation energy of the____________
a)
Reactants b) Reactions c) Product d) ES complex
18.Sometimes
co-factor provides a source of _________energy to derive reactions.
a)
Kinetic b) Mechanical c) Chemical d) None of them
19.The
catalytic activity is restricted to a small portion known as:
a)
Substrate b) Coenzyme c) Active site d) All of them
20.Enzymes
are very sensitive to a minor change in:
a)
Water Concentration b) Product Concentration c) Substrate Concentration d) All
of them
II) Write short answers to these questions:
1. Give
the formula of succinic acid. Is it competitive or non-competitive inhibitor?
2. How
different enzymes act in a series of chemical reactions?
3. What
is the optimum pH? Give examples
4. How
low and high temperatures affect enzyme activity?
5. How
does an enzyme accelerate a metabolic reaction?
6. How
enzyme succinic dehydrogenase works?
7. What
is cofactor? Define activator.
8. What
is the difference between the prosthetic group and coenzyme?
9. How
pepsinogen works?
10. Why
enzymes are specific in nature?
11. How
change in pH can affect the rate of enzyme action?
12. What
is the literal meaning of metabolism explain briefly
13. What
are competitive inhibitors?
14. What
is the difference between the lock and key model and Induced fit model?
15. Give
three characteristics of enzymes.
16. What
is a prosthetic group?
17. What
do you know about apoenzyme?
18.Name
the factors affecting the activity of enzymes.
19.Define
inhibitors of the enzyme?
20.Define
inhibitors. Give examples
Tags:
PAPERS