PU CET UG 2025 Question Paper Biology

1) Who among the following proposed the cell theory?
(A) Hugo de Vries (B) R. Virchow
(C) Schleiden and Schwann (D) Hook
2) Disease-free plants are obtained from:
(A) Callus culture (B) Meristem culture (C) Shoot culture (D) Root culture
3) The edible part of litchi is:
(A) Mesocarp (B) Endosperm (C) Aril (D) Pericarp
4) The ecosystem with the highest gross primary productivity is:
(A) Mangroves (B) Grassland (C) Rainforest (D) Coral reef
5) Which among the following is not a free-floating plant?
(A) Wolffia (B) Lemna (C) Eichhornia (D) Utricularia
6) Which of the following is free living, aerobic, non-photosynthetic nitrogen-fixing
bacterium?
(A) Azotobacter (B) Rhizobium (C) Nostoc (D) Azospirillium
7) NADPH2 is generated during:
(A) Photosystem I (B) Photosystem II (C) Glycolysis (D) None of these
8) Alcoholic fermentation is carried out by:
(A) Clostridium (B) Lactobacillus (C) Saccharomyces (D) Aspergillus
9) Kranz anatomy is found in the leaves of:
(A) Wheat (B) Rice (C) Sorghum (D) Cotton
10) Which poisonous gas is associated with the Bhopal gas tragedy?
(A) Sodium isothiocyanate (B) Methyl isocyanate
(C) Potassium isothiocyanate (D) Ethyl isothiocyanate
11) Ray and disc florets are found in which family:
(A) Poaceae (B) Asteraceae (C) Fabaceae (D) Apiaceae
12) The quantum yield of photosynthesis is:
(A) 10% (B) 9% (C) 11% (D) 12%
13) Which of the following is a triploid tissue in angiosperms?
(A) Nucellus (B) Endosperm (C) Tapetum (D) Endothelium
14) Tapetal cells are characterised by:
(A) Meiotic divisions (B) Mitotic divisions
(C) Endomitosis (D) Endomitosis and Endopolyploidy
15) Colchicine arrests cell division at which stage of the cell cycle?
(A) Anaphase (B) Metaphase (C) Telophase (D) Prophase
16) Which among the following plants is a source of anticancer drugs?
(A) Tagetes (B) Thea (C) Tamarix (D) Taxus

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17) Which element is required for the growth of the pollen tube?
(A) Mg (B) Mn (C) B (D) Ca
18) Vivipary is found in:
(A) Sciophytes (B) Halophytes (C) Heliophytes (D) Xerophytes
19) Which of the following is known as a ‘living fossil’?
(A) Gnetum (B) Pinus (C) Ephedra (D) Ginkgo
20) Fixation of one molecule of CO2 through the Calvin cycle requires:
(A) 3 ATP and 2 NADPH2 molecules (B) 2 ATP and 3 NADPH2 molecules
(C) 2 ATP and 2 NADPH2 molecules (D) 1 ATP and 2 NADPH2 molecules
21) Genetic recombination brought about by a virus in bacteria is known as:
(A) Transformation (B) Conjugation (C) Transduction (D) Sexduction
22) Agar-Agar is obtained from:
(A) Fungi (B) Alagae (C) Bacteria (D) Mycoplasma
23) The translator mechanism is found in:
(A) Ocimum (B) Pisum (C) Calotropis (D) Yucca
24) Cleistogamy is found in:
(A) Commelina (B) Brassica (C) Ficus (D) Helianthus
25) The Dihybrid cross demonstrates the law of:
(A) Dominance (B) Purity of gametes
(C) Segregation (D) Independent assortment
26) Due to the cross between TTRr × ttrr the resultant progenies showed how many percent
plants would be, tall, red flowered?
(A) 50% (B) 75% (C) 100% (D) 25%
27) The first amino acid in any polypeptide chain of prokaryotes is always:
(A) Formylated methionine (B) Formylated arginine
(C) Methionine (D) Alanine
28) The transition zone between the two communities is known as:
(A) Ecads (B) Ecoline (C) Ecotone (D) Edge effect
29) The term ecosystem was coined by:
(A) Tansley (B) Odum (C) Mishra (D) Reiter
30) Which ecological pyramid is always upright in nature:
(A) Biomass (B) Energy (C) Number (D) None of these
31) Binomial nomenclature, a system of providing a universally accepted name to an
organism having Generic name and specific epithet was given by:
(A) Carolus Linnaeus (B) Ernst Mayr
(C) Charles Darwin (D) Aristotle

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32) Which of the following organism is not a member of Kingdom Monera:
(A) Nostoc (B) Anabaena (C) Saccharomyces (D) Mycoplasma

33) Bovine spongiform encephalopathy is caused by:
(A) Viroid (B) Prions (C) Viruses (D) Bacteria

34) In organisms of which of the following phylum ‘choanocytes’ are present:
(A) Porifera (B) Coelenterata (C) Ctenophora (D) Chondrichthyes

35) Which of the following is an oviparous mammal:
(A) Flying fox (B) Blue whale (C) Platypus (D) Dolphin

36) Which of the following animal is not a member of class Reptilia:
(A) Testudo (B) Bungarus (C) Struthio (D) Hemidactylus

37) In which of the following you can find gap junctions:
(A) Between two skeletal muscle fibers (B) Between two smooth muscle fibers
(C) Between two collagen fibers (D) Between two elastin fibers

38) In female cockroach brood pouch is formed by:
(A) 5th, 6th and 7th sterna (B) 6th, 7th and 8th sterna
(C) 7th, 8th and 9th sterna (D) 8th, 9th and 10th sterna

39) ‘Bidder’s canal’ is:
(A) Part of reproductive system of male frog
(B) Part of reproductive system of female frog
(C) Part of reproductive system of male cockroach
(D) Part of reproductive system of female cockroach
40) The axoneme of cilia has 9+2 arrangement of which of the following cytoskeletal
elements:
(A) Microfilaments (B) Microtubules
(C) Myosin filaments (D) Intermediate filaments and radial spokes
41) Which of the following is one of the characteristics of outer membrane of nucleus:
(A) It is continuous with membrane of nucleolus and bears ribosomes
(B) It is continuous with endoplasmic reticulum and bears ribosomes
(C) It is continuous with endoplasmic reticulum and does not bear ribosomes
(D) It is continuous with Golgi apparatus and bears ribosomes
42) Which of the following statement is true about ribosomes:
(A) They consist of rRNA, mRNA and are bound by membrane
(B) They consist of rRNA, mRNA and are not bound by membrane
(C) They consist of rRNA and proteins and bound by membrane
(D) They consist of rRNA and proteins and are not bound by membrane

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43) Which of the following statement is not true about nucleolus:
(A) It is site for rRNA synthesis
(B) It is site for production of ribosomes
(C) Nucleus will always have one nucleolus
(D) Nucleus can contain many nucleoli
44) Which of the following amino acid has hydroxymethyl as its side chain (R group):
(A) Glycine (B) Alanine (C) Serine (D) Tyrosine
45) Which of the following nitrogenous base has double ring structure:
(A) Adenine (B) Uracil (C) Thymine (D) Cytosine
46) Many times a non-protein constituent is bound to enzyme so as to make it catalytically
active. In such case protein portion of the enzyme is known as:
(A) Prosthetic group (B) Co-factor (C) Co-enzyme (D) Apoenzyme
47) Appearance of recombinant nodule is the characteristic of which of the following stage of
cell division:
(A) Zygotene stage of prophase I of meiosis I
(B) Zygotene stage of prophase II of meiosis II
(C) Pachytene stage of prophase I of meiosis I
(D) Pachytene stage of prophase II of meiosis II
48) Which of the following is not a constituent of succus entericus:
(A) Maltase (B) Lipase (C) Pepsin (D) Dipeptidase
49) Emphysema is a disorder characterized by:
(A) Damaged walls of alveoli
(B) High production of growth hormone
(C) Damaged cuboidal cells of nephron
(D) High production of epinephrine
50) In normal circumstances ADH controls the water reabsorption from which part of the
nephron:
(A) Bowman’s capsule (B) Proximal convoluted tubule
(C) Loop of Henle (D) Distal convoluted tubule
51) In sarcomere of skeletal muscle fibers, actin filaments are anchored at:
(A) Z-line (B) M-line
(C) H-zone (D) Both M-line and Z-line
52) Eustachian tube connects:
(A) Inner ear cavity to pharynx (B) Middle ear cavity to pharynx
(C) Lacrimal sac to nasal cavity (D) Lacrimal gland to eye
53) Testosterone hormone is secreted by which of the following cells:
(A) Spermatids (B) Spermatogonia (C) Sertoli cells (D) Leydig cells

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54) RNA polymerase I is responsible for transcription of:
(A) rRNA (B) mRNA (C) tRNA (D) snRNA
55) Trisomy of chromosome 21 in humans leads to which of the following disorder:
(A) Turner syndrome (B) Klinefelter syndrome
(C) Down syndrome (D) Cri-du-chat syndrome
56) Which of the following is a bacterial disease:
(A) Filariasis (B) Typhoid (C) Ring worm (D) Mumps
57) ABO blood grouping system in humans is an example of:
(A) Co-dominance and multiple allelism
(B) Co-dominance and biallelic inheritance
(C) Dominant epistasis and multiple allelism
(D) Dominant epistasis and biallelic inheritance
58) Human pro-insulin, a precursor to insulin is a long polypeptide chain consisting of A, B
and C peptide regions in it. During formation of insulin from pro-insulin, these peptides
are cleaved and rearranged by disulfide bonds, so that mature insulin is composed of:
(A) All A, B and C chains (B) A and B chain
(C) A and C chain (D) B and C chain
59) The relationship between gross primary productivity (GPP), respiration (R) and net
primary productivity (NPP) in an ecosystem is given by the equation:
(A) NPP=GPP-R (B) NPP=GPP+R (C) NPP=GPP×R (D) NPP=GPP÷R
60) Keoladeo Ghana National Park is situated in which state of India :
(A) Madhya Pradesh (B) Maharashtra (C) Rajasthan (D) Haryana
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