MOST IMPORTANT MCQS OF BIOLOGY CH 13 CLASS FSC
IMPORTANT MCQS OF BIOLOGY 1ST YEAR
IMPORTANT MCQS OF BIOLOGY FOR ENTRY TEST
GASEOUS EXCHANGE, IN BIRDS LIKE OSTRICH, ANTEATER BIRDS GOLDEN EAGLE STORK FINCH PHEASANT BLACKBIRD SHREW BORN OWL FISHES LIKE PUFFER FISH SNAKEHEAD FISH
MCQs WITH ANSWERS GASEOUS EXCHANGE IN ORGANISMS
Arterial blood contains about ________of CO2 per 100ml of blood.
a) 30% b) 40% c) 50% d) 70%
Correct Answer
50%
_______ CO2 is carried as carboxyhaemoglobin in human body.
a) 0.2% b) 2.0% c) 20% d) 29%
Correct Answer
20%
In cellular respiration, the cell utilizes.
a) Carbon dioxide b) Oxygen c) NADPH d) ATP
Correct Answer
Oxygen
Bronchi with a diameter of ______ or less are called bronchioles.
a) 1m b) 1mm c) 1cm d) None of them
Correct Answer
1mm
Respiratory pigment present in muscles is called _______.
a) Myoglobin b) Globin c) Haemoglobin d) Haemocyanin
Correct Answer
Myoglobin
The ________tissue has special pores called lenticels.
a) Cork b) Mesophyll c) Epidermal d)
All of them
Correct Answer
Cork
Respiration occurs at ____ levels.
a) 1 b) 2 c) 3 d) 4
Correct Answer
2
The pathway in which RuBP is converted into _______is called photorespiration.
a) Glycine b) Serine c) Carbon dioxide d) None of them
Correct Answer
Serine
In most plants, photorespiration reduces the amount of carbon fixed into carbohydrates by:
a) 2.5% b) 5% c) 25% d) 35%
Correct Answer
25%
Water is _______times more dense than air.
a) 80 b) 800 c) 8000 d) 80000
Correct Answer
8000
Exchange of gases during organismic respiration is carried out only by.
a) Active transport b) Passive transport c) Osmosis d) Both a & c
Correct Answer
Passive transport
When oxygen tension is 100mm mercury, 100ml of blood contains ______ oxygen.
a) 19.6 L b) 19.6 mm c) 19.6ml d) 19.6 cm3
Correct Answer
19.6ml
About ______CO2 in human body is carried as bicarbonate ion.
a) 40% b) 60% c) 70% d) 80%
Correct Answer
70%
Organismic respiration is known as.
a) Breathing b) Ventilation c) Respiration d)
Both a & b
Correct Answer
Both a & b
Carbonic anhydrase is present in:
a) Liver b) Muscles c) Lungs d) RBCs
Correct Answer
RBCs
Lungs are placed in:
a) Chest cavity b) Abdominal cavity c) Partly in the chest and partly in abdomen cavity d) None of them
Correct Answer
Chest cavity
MyOglobin is haemoglobin-like iron-containing:
a) Enzymes b) Lipid c) Protein d) None of them
Correct Answer
Protein
Tiny thin-walled ducts present in the lungs of birds are called:
a) Alveoli b) Trachea c) Spiracles d) None of them
Correct Answer
None of them
Respiratory pigment present in muscles is called as:
a) Haemoglobin b) Globin c) Flagellin d) None of them
Correct Answer
None of them
Glycine is the simplest:
a) Nucleotide b) Amino acid c) Fatty acid d) None of them
Correct Answer
Amino acid
Emphysema is the breakdown of________.
a) Lungs b) Parabronchi c) Bronchi d) None of them
Correct Answer
None of them
Bronchioles are made up of_________ muscles:
a) Skeletal b) Smooth c) Elastic d) All of them
Correct Answer
Smooth
Main tracheal trunk communicates with exterior by ______pairs of spiracles.
a) 4 b) 8 c) 10 d) 14
Correct Answer?
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GASEOUS EXCHANGE, IN BIRDS LIKE OSTRICH, ANTEATER BIRDS GOLDEN EAGLE STORK FINCH PHEASANT BLACKBIRD SHREW BORN OWL FISHES LIKE PUFFER FISH SNAKEHEAD FISH
1. During photorespiration. Glycine is converted into serine in the:
a) Mitochondria b) Ribosome c) Golgi bodies d) Chloroplast
Correct Answer
Mitochondria
2. The number of air sacs in birds are:
a) 6 b) 7 c) 8 d) 9
Correct Answer
9
3. Lungs of birds have thin-walled ducts called:
a) Alveoli b) Trachea c) Bronchi d) Parabronchi
Correct Answer
Parabronchi
4. Breathing rate in man at rest is:
a) 10 - 15 times/minutes b) 15 - 20 times/minutes c) 20 - 25 times/minutes d) 25 - 30 times/minutes
Correct Answer
15 - 20 times/minutes
5. In earthworms exchange of gases mainly occurs through:
a) Gills b) Lungs c) Skin d) Ostia
Correct Answer
Skin
6. Blood is not involved in the transport of gas in:
a) Fish b) Insects c) Frog d) Man
Correct Answer
Insects
7. Air space between mesophyll Cells of a leaf comprises of the total volume of leaf:
a) 20% b) 30% c) 40% d) 50%
Correct Answer
40%
8. During photorespiration glycine after its formation diffuses into:
a) Ribosome b) Mitochondria c) Peroxisome d) Glyoxysome
Correct Answer
Mitochondria
9. Tiny thin-walled ducts called parabronchi are present in the lungs of:
a) Mammals b) Amphibians c) Birds d) Reptiles
Correct Answer
Birds
10. The main sites of exchange of gases in plants are:
a) Lenticels b) Cuticles c) Epidermis d) Stomata
Correct Answer
Stomata
11. When oxygen tension is 115 mm of mercury then haemoglobin saturation is:
a) 100% b) 98% c) 78% d) 68%
Correct Answer
98%
12. The most efficient and highly modified for gaseous exchange in aquatic animals are:
a) Lungs b) Spiracles c) Gills d) Trachea
Correct Answer
Gills
13. A litre of water contains ml oxygen:
a) 10 b) 20 c) 30 d) 40
Correct Answer
10
14. Pleura is doubled layered thin membrane that covers:
a) Heart b) Liver c) Lungs d) Kidneys
Correct Answer
Lungs
15. Gaseous exchange occurs in frog through the lungs is called:
a) Cutaneous respiration b) Photorespiration c) Pulmonary respiration d) Cellular respiration
Correct Answer
Pulmonary respiration
16. All of the following contain cartilage expect:
a) Larynx b) Trachea c) Bronchioles d) Bronchi
Correct Answer
Bronchioles
17. Lungs are covered with double membrane sacs called:
a) Pleura b) Scrotoum c) Pericardium d) Diaphragm
Correct Answer
Pleura
18. Oxygen contents of fresh air are:
a) 200ml/litre b) 100ml/litre c) 10ml/litre d) 150ml/litre
Correct Answer
200ml/litre
19. During photorespiration glycolate diffuses into the membrane-bound d organelle named as:
a) Mitochondria b) Ribosome c) Peroxisome d) Golgi bodies
Correct Answer
Peroxisome
20. Parabronchi are found in the lungs of:
a) Amphibians b) Reptiles c) Birds d) Mammals
Correct Answer
Birds
21. How many molecules of oxygen can bind with a molecule of myoglobin:
a) 4 b) 3 c) 2 d) 1
Correct Answer
1
22. A number of airs sacs in birds is:
a) 6 b) 7 c) 8 d) 9
Correct Answer
9
23. Haemoglobin in man increases the oxygen-carrying capacity of the blood to about:
a) 75 times b) 50 times c) 60 times d) 100 times
Correct Answer
75 times
24. Lungs are covered with double membranous sac called as:
a) Pleura b) Pericardium c) Scrotum d) Diaphragm
Correct Answer
Pleura
25. The normal alveolar ventilation is regulated by:
a) Haemoglobin b) Oxygen c) Iron d) Carbon dioxide
Correct Answer
Carbon dioxide
GASEOUS EXCHANGE, IN BIRDS LIKE OSTRICH, ANTEATER BIRDS GOLDEN EAGLE STORK FINCH PHEASANT BLACKBIRD SHREW BORN OWL FISHES LIKE PUFFER FISH SNAKEHEAD FISH
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