Ppsc Lecturer Past Papers Biology Solved
This Ppsc Lecturer Past Papers Biology Solved. All the MCQs are fully solved and almost correct without any mistakes or misunderstandings. Ppsc Lecturer Past Papers Biology gives an overview of the pattern and types of questions for guaranteed success.
Ppsc biology 2020 (27 December)
Ppsc Lecturer Past Papers Biology
- which of the following viruses has caused thousands of death annually as an emergent virus
a)MERS b)SARS c)OC43 d)HKU1
ANS: SARS
2. which one of the following toxic metals is extensively found in the newspaper
a)Mg b) Cd c)Pb d) Hg
ANS: LEAD
3. among the following which one is the diploblastic organism
a)Hydra b)Crab c)Squid d) Earthworm
ANS: HYDRA( BELONGS TO PHYLUM COELENTERATA)
4. New alleles can be introduced into a population gene pool by-----------------Ppsc Lecturer Past Papers Biology
a)Mutation b)Natural selection c)Gene flow d)Both A & C
ANS: BOTH A &C
5.The number of alveoli in the human lungs is estimated to be around-------
a)150 Million b)500 Million c)800 Billion d)1.0Billion
ANS: 500 MILLION APPROXIMATELY 480 IS EXACT NO.(WWW.HEALTHLINE.COM)
6.NADP+ is a /an------
a)Enzyme activator b)Ion carrier c)Hydrogen Acceptor d)All of these
ANS: HYDROGEN ACCEPTOR (NOT ACTIVATOR BECAUSE ACTIVATORS ARE METAL IONS WHILE IT IS COENZYME AND ORGANIC IN NATURE.THE SECOND OPTION IS ALSO WRONG BECAUSE IT IS ELECTRON CARRIER NOTION CARRIER)
7. Smooth muscles, cardiac muscles, and glands are regulated by______
a)Central nervous system b)parasympathetic nervous system c) sympathetic d)autonomic nervous system
ANS: AUTONOMIC NERVOUS SYSTEM
8.Kranz anatomy is a characteristic feature of
a)C4 Plants b)C3 plants d)C2 Plants d) CAM Plants
ANS:C4 PLANTS
(https://www.toppr.com/ask/question/which-one-is-feature-of-kranz-anatomy/)
9.At level above-----------------------sound turns into a harmful noise pollution
a)80 db b)30db c)100db d)120db
ANS:120 DB
10.Choose the correct article: wait for me by----------------school gate at four o clock
a)An b)A c)The d)article not required
ANS: THE (https://jobexpert.pk/)
11.-------------------- gland is pea size
a)Adrenal b)Pituitary c)Pancreas d)Hypothalamus
ANS: PITUITARY GLANDS
12.savannah is -----------
a)Tropical rain forest b)Dense forest with closed canopy c)Grassland with scattered trees d)Grassland with closely grown trees
ANS: Grassland with scattered trees
13.Identify the pollutant responsible for the curling of leaves
a)CO b)O3 c)H2S d)SO2
ANS: SO2
14.Terrestrial biodiversity is generally found to be greater near the ---------
a)North Pole b) south Pole c)Equator d)Tropic of cancer
ANS: EQUATOR
15.The total age of A and B are 12 years more than the total age of B and C.How many years is C younger than A
a)12 b)13 c)14 d)15
ANS:12 YEARS(https://www.careerbless.com/aptitude/qa/discuss/207_28.php)
16.Polymorphism is a characteristic of the phylum
a)Cnidaria b)nematode c)annelid d)none of these
ANS: CNIDARIA(WWW.TOPPERS.COM)
17.A species that can inhabit different geographical areas is known as
a)sympatric b)allopatric c)sibling d)biospecies
ANS:ALLOPATRIC (WWW.TOPPERS.COM)
18.the chief atmospheric layer present near the surface of the earth
a)mesosphere b)ionosphere c)troposphere d)stratosphere
ANS: TROPOSPHERE
19.How many base pairs are there in every helical turn of Watson's cricks double helix method
a)32.3 b)11.6 c)20. D)10.4
ANS:10.4-10.5 bp
20.basic democratic system came in Pakistan in------------
a)1956 b)1958 c)1960 d)1959
ANS:1959(https://pakmcqs.com/pak-study-mcqs/basic-democracy-system-came-in___________)
- the average of four consecutive odd numbers is 24.find the largest number
a)25 b)27 c)29 d)31
ANS:27(Let the numbers are x, x+2, x+4, x+6, then
=>x+3=24=>x=21
So largest number is 21 + 6 = 27
So option B is correct answer.https://edurev.in/question/467946/The-average-of-four-consecutive-odd-numbers-is-24- )
22.out of the following which is not a stop codon
a)UAA b)UAG c)GUG d) UAG
ANS: GUG
23.term pleiotropy is explained with when:
a)single allele affects a single phenotypic trait b)single allele affect multiple phenotypic traits
c)multiple alleles affects multiphenotypic allele d)multiple alleles affects a single phenotypic trait
ANS: SINGLE GENE AFFECT MULTIPLE PHENOTYPIC TRAITS)
24.bird vertebrae are
a)acoelous b)heterocoelous c)amphicoelous d) procoelous
ANS:HETEROCELOUS
25.where are the histamine secreting cells found
a)nervous tissue b)connective tissue c)areolar tissue d) none of them
ANS: CONNECTIVE TISSUE
26.during meiosis, when does the synapsis occur
a)prophase 1 b)metaphase 1 c)anaphase 1 d) pachytene
ANS: PROPHASE 1
27.glottis open on the floor of
a)pharyngeal cavity b)diaphragm c)trachea d)None of the above
ANS:TRACHEA
28.______________ is produced by sea weeds
a)gelatin b)alginic acid c)carragenen d)biotoxin
ANS: ALGINATE OR ALGINIC ACID
29.in which country does the desert city Timbuktu lie
a)morocco b)Mauritania c)mali d)Sudan
ANS:MALI
30.which of the following is a rich source of B vitamin
a)peptone b)tryptone c)yeast extract d)agar
ANS: AGAR
31.world environment day is
a)28th February b) 5th June c)7th august d)10th April
ANS: 5TH JUNE
32.the activity of succinate dehydrogenase is inhibited by
a)glycolate b)malonate c)pyruvate d)phosphoglycerate
ANS:MALONATE
33.splitting of the atom is also called
a)merging b)moderating c)fusion d)fission
ANS:FISSION
34.female sex organ of the bryophyte is
a)archegonium b)antheridium c)carpogonium d)ascogonium
ANS: ARCHEGONIUM
35.which of the following is the gram-negative type of bacteria
a)lactobacillus b)Escherichia coli c)Staphylococcus aureus d)bacillus subtilis
ANS:E.COLI
36.rubisco content of chloroplast is
a)12% b)19% c)20% d)16%
ANS:16%
37.find a mismatch
a)taq polymerase,polymerase b)template-double stranded DNA c)primer-oligonucleotide d)synthesis 5 to 3 direction
ANS:template-double stranded DNA
38.----------------leads to the formation canal system in sponges
a)inner wall folding b) gastro-vascular system c)reproduction d)porous wall
ANS: INNER WALL FOLDING
39.BIOS is stored in
a)hard disc b)RAM c)flash memory chips d)None of them
ANS: FLASH MEMORY CHIPS
https://www.mastguru.com/where-bios-is-stored/3416
40. interferon is made by
a)lymphocytes b)lymphoblasts c)Fibroblasts d)all of these
ANS: ALL OF THESE
https://doubtnut.com/pcmb-questions/interferon-is-formed-by-a-lymphocytes-b-lymphoblasts-c-fibroblasts-d-all-of-these-216504
41.name the cell line of human embryonic lung
a)TH1 b)WISH c)L d)MRC_5
ANS: MRC_5(Answer: explanation: MRC-5 is the cell line of the human embryonic lung while HeLa is the cell line of human cervical carcinoma. L represents human connective tissue and WISH is the cell line of human amnion.)(www.sanfoundary.com)
42.who met the khatam-un-nabiyeen Hazrat Muhammad (PBUH) at the first heaven during Miraj
a)Hazrat Haroon(AS) b)HAZRAT ADAM(AS) c)Hazrat Suleman (AS) d)Hazrat ESSA (AS)
ANS: HAZRAT ADAM (AS)
43.NADPH2 is produced by
a)Glycolysis b)photosystem 1 c)photosystem 2 d)anaerobic respiration
ANS: PHOTOSYSTEM II
44.the enlarged ripened ovary is called:
a)ovule b)seed c)fruit d)cotyledon
ANS: FRUIT
45.Of the following which one is not a search engine
a)GOOGLE b)MSN c)Yahoo d) Linux
ANS: LINUX
46. deposition of cDNA into the inert structure is known as
a)DNA probe b)DNA Polymerase c)DNA microarrays d)DNA
ANS: DNA MICROARRAY
47. name the camel which the HOLY Prophet (PBUH)was riding on the migration of Madina
a)Dudull b)ANZA c)QASWA d)Zulfiqar
ANS: QASWA
48.Smog is composed of
a)O3 b)NOx c)PPN d)both A and B
ANS: BOTH A& B
- The least porous soil among the following is a
) Loamy soil b) clayey soil c) silty soil d) peaty soil
ANS: CLAYEY SOIL
- Staphylococcus aureus is was isolated by
- a) Robert Koch b) Louis pasture c) PASSET d) Sir Alexander Ogston
ANS:Sir Alexander Ogston
- ----- is an enzyme those covalent bonds between restriction fragments
a)DNA primase b)DNA helicase c)DNA polymerase d)DNA ligase
ANS: DNA LIGASE
52.Mendel was an Austrian
a)Monk b)Biology teacher c)Scientist d) mathematician
ANS: MONK
53.What is the unit of the genetic map.
a)Centimeter b)nanometer c)Angstrom d)centimorgan
ANS: CENTIMORGAN
54.Trisomy of --------------------- leads to the pataue,s syndrome
a)13th chromosome b)18th chromosome c)21st chromosome d)22nd chromosome
ANS:13TH CHROMOSOME
55.human immune deficiency virus HIV affects
a)red blood cells b)fibroblasts c)helper t lymphocytes CD4 d)mast cells
ANS: HELPER T LYMPHOCYTES CD4
56.----------- is the sensitive layer of the eye
a)retina b)iris c)choroid d)sclera
ANS:RETINA
57.Dengue virus belongs to------------
a)flaviviridae b)togaviridae c)reoviridae d)rhabdoviridae
ANS:FLAVIVIRIDAE
58.identify the feeding mode of extinct conodonts:
a)herbivory b)absorptive feeding c)predation d)filter feeding
ANS: PREDATION
(https://www.brainscape.com/flashcards/chapter-34-test-bank-751163/packs/1277936)
59.how many pairs of cranial nerves are associated with the fish brain
a)15 b)13 c)10 d)8
ANS:13
60.activity of one gene suppressed by the activity of another nonallelic gene is called
a)dominant b) suppression c)epistasis d) hypostasis
ANS: EPISTASIS
61.site for the active synthesis of ribosomal RNA is ---------
a)nucleoplasm b)ribosomes c) nucleolus d)lysosomes
ANS: NUCLEOLUS
62.primary carboxylation in C3 plants is carried out by the enzyme
a)pyruvate carboxylase b)succinate dehydrogenase c)hexokinase d)RUBP carboxylase/oxygenase
ANS: RUBP CARBOXYLASE/OXIGENASE
63.--------------- secrete glucagon hormone
a)thyroid b) pituitary glands c)liver d)pancreas
ANS: PANCREASE
64.cross of F1 offspring with any of its parents is called-----------------
a)test cross b)single cross c)double cross d) backcross
ANS: BACK CROSS
65.phenetic classification is based on
a)sexual characters b)dendrogram based on DNA characters c)ancestral lineage of existing organisms d)observable characters of existing organisms
ANS:OBSERVEABLE CHARACTERS OF EXISTING ORGANISMS
66.the larva of lobster is known as
a)phyllosoma b)mysis c)zoea d)nauplius
ANS:PHYLLOSOMA
67.the headquarters of shanghai cooperation organization(SCO) is in
a)Beijing b)asteria c)Almaty d)shangHai
ANS:BEIJING
68.sister chromatids move to opposite poles in which phase of the mitosis
a)telophase b)anaphase c)prophase b)metaphase
ANS: ANAPHASE
69.water movement from cell to cell through plasmodesmata is called
a)apoplastic b)transmembrane c)facilitated d)symplast
ANS: SYMPLAST PATHWAY
70.every statement must have a subject and ----------------------
a)noun b)verb c)predicate, d)phrase
ANS: PREDICATE
71.in GRAM staining iodine is used as a-------------------
a)fixative b)mordent c)solubilizer d)stain
ANS: MORDENT
72.which of the following is the narrowest strait of the world
a)strait of tartar b)bab-al-mandeb c)strait of dardendrillies d)foveaux strait
ANS:STRAIT OF TARTAR
73.certain genetic defects such as alkaptonuria and albinism is described by
a)dominant gene b)recessive inheritance c)x-chromosome d)y-chromosome
ANS: RECESSIVE INHERITANCE
74.which form of DNA is described, Watson &crick model of DNA
a)B-DNA b)Z-DNA C)A-DNA D)QUARAPLEX DNA
ANS:B- DNA
75.the nonprotein part of the enzyme is known as
a)holoenzyme b)apoenzyme c)vitamin d)prosthetic group
ANS: PROSTHETIC GROUP
76.western blotting is a technique used for the determination of
a)RNA b)DNA c)PROTEIN d)ALL OF THESE
ANS: PROTEIN
77.identify the input sequence format in BLAST
a)GENBANK B)EMBL C)FASTA D)PIR
ANS:FASTA
78.the flag of which country is called is also known as the union jack
a)UK b) USA c) NEWZEALAND d)BARBADOS
ANS: UK
79.male breast cancer is strongly linked with a mutation in
a)BRCA1 b)BRCA2 C)NF1 D)RET
ANS:BRCA2
80.WHEN WHITE LIGHT IS PASSED through prism .it splits into-------------- colors
a)5 b)6 c)7 d)8
ANS:7
81.which group does not contain polyp
a)anthrozoa b)hydrozoa c)calcaria d)scyphozoan
ANS:CALCAREA
82.identify which enzyme is not thermostable
a)Pfu polymerase b)Taq polymerase c)vent polymerase d)DNA Polymerase III
ANS: DNA POLYMERASE III
83.apart from hearing which another function is performed by ear
a)nerve pressure reduction b)hormone secretion c)body balancing d)all of these
ANS: BODY BALANCE
84.an abrupt change from anaerobic to aerobic the process gives rise to.
a)Emerson Effect b)Hill reaction c)Pasture,s effect d)Blachman, slaw
ANS: PASTURES EFFECT
85.Polygenetic genetic relationship can be presented by
a)Dendrogram b) Genbank c)data retrieving tool d)Data search tool
86. Tropical rain forest are found in the area where average annual rainfall is
a)200cm b)150cm c)100cm d)70 cm
ANS:200cm
87.During Krebs cycle, direct ATP production per glucose molecule is
a)2 b)8 c)30 d)38
ANS:2ATP
88.The world tallest man-made waterfall is
a)Angel b)Niagara c)jog d)Jurong
89. Basic taxonomist unit is called
a)kingdom b)genus c)order d)species
ANS: SPECIES
90. How much of the globulin is present in human serum
a)2.6-3.5 g/dl b)2.2—3.8 g/dl c)2.1-3.0 g/dl d)3.6-4.5 g/dl
2.2—3.8 g/dl
91. Pakistan largest export partner is
a)CHINA B)US C)EU D)NONE OF THEM
ANS: US(BUT EMERGING IS CHINA)
92. In the evolution of modern man (homo sapiens) from his ancestor, identify the most significant trend
a)increasing cranial capacity b)upright posture c)shortening of jaws d) binocular vision
ANS: INCREASING CRANIAL CAPACITY
93.when individual somatic cells contain three sex chromosome XXX this is called……..
a)Down,s syndrome b)klinefelter syndrome c)Turner syndrome d)super female
ANS:KLINEFELTER SYNDROME
94.Totipotency has shown by
a)xylem b)meristem c) cork d)all of these
ANS: MERISTEM
95.silk thread is obtained from the silk moth during
a)pupil stage b)larval stage c)nymph stage d)adult stage
ANS: PUPIL STAGE
96.Who received the Nobel prize for literature in 2016
a)JOHN LENON b)Arundhati Roy c)Bob DyLan d)Nadine Gordimar
ANS:Bob Dylan
97.Number of cotyledon in Zea mays,cycus and pinus individually are
a)1,2,4 b)1,2, many c)2,2, many d) 2,1,4
ANS:1,2,MANY
98. Which one of the following is the first reaction in photorespiration
a)Decarboxylation b)oxygenation c)carboxilation d)photophosphorylation
ANS:OXYGENATION
۔جاناں جاناں کس کا مجموعہ کلام ہے- 99
ا-شہزاد احمد ب-تحسین فراقی ج-ظفر اقبال د- احمد فراز
100- کے درست مطلب کا انتخاب کریں-“By hook or By crook”
.جائز و نا جائز طریقے سے1