Chara is a monoecious alga where male (antheridium) and female (oogonium) sex organs are on the same plant body.
Q101mcq
Which of the following plants is monoecious?
a.
Carica papaya
b.
Chara
Correct Answer
c.
Marchantia polymorpha
d.
Cycas circinalis
Step-by-Step AI Explanation
Verified Method
Monoecious plants have male and female sex organs on the same plant body. Chara is monoecious, whereas the others listed are dioecious.
Q102mcq
A typical angiosperm embryo sac at maturity is:
a.
8-nucleate and 7-celled
Correct Answer
b.
7-nucleate and 8-celled
c.
7-nucleate and 7-celled
d.
8-nucleate and 8-celled
Step-by-Step AI Explanation
Verified Method
A typical angiosperm embryo sac contains 7 cells (3 antipodals, 2 synergids, 1 egg cell, and 1 central cell) but 8 nuclei (because the central cell is binucleate).
Q103mcq
Gemmae are present in
a.
Mosses
b.
Pteridophytes
c.
Some Gymnosperms
d.
Some Liverworts
Correct Answer
Step-by-Step AI Explanation
Verified Method
Gemmae are green, multicellular asexual buds produced by some liverworts, such as Marchantia.
Q104mcq
When the centromere is situated in the middle of two equal arms of chromosomes, the chromosome is referred as:
a.
Metacentric
Correct Answer
b.
Telocentric
c.
Sub-metacentric
d.
Acrocentric
Step-by-Step AI Explanation
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A chromosome with a centromere in the middle, creating two equal arms, is termed metacentric.
Q105mcq
Which of the following stages of meiosis involves division of centromere?
a.
Metaphase I
b.
Metaphase II
c.
Anaphase II
Correct Answer
d.
Telophase II
Step-by-Step AI Explanation
Verified Method
The division of the centromere occurs specifically during Anaphase II of meiosis.
Q106mcq
The first stable product of CO2 fixation in Sorghum is
a.
Pyruvic acid
b.
Oxaloacetic acid
Correct Answer
c.
Succinic acid
d.
Phosphoglyceric acid
Step-by-Step AI Explanation
Verified Method
Sorghum is a C4 plant, and the first stable product of CO2 fixation in C4 plants is oxaloacetic acid.
Q107mcq
The factor that leads to Founder effect in a population is:
a.
Natural selection
b.
Genetic recombination
c.
Mutation
d.
Genetic drift
Correct Answer
Step-by-Step AI Explanation
Verified Method
The founder effect is a phenomenon observed when a small group of individuals becomes isolated and establishes a new population, which is a form of genetic drift.
Q108mcq
Which of the following is an incorrect statement?
a.
Mature sieve tube elements possess a conspicuous nucleus and usual cytoplasmic organelles
Correct Answer
b.
Microbodies are present both in plant and animal cells
c.
The perinuclear space forms a barrier between the materials present inside the nucleus and that of the cytoplasm
d.
Nuclear pores act as passages for proteins and RNA molecules in both directions between nucleus and cytoplasm
Step-by-Step AI Explanation
Verified Method
Mature sieve tube elements lack a nucleus, making statement (1) incorrect.
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The term used for transfer of pollen grains from anthers of one plant to stigma of a different plant which, during pollination, brings genetically different types of pollen grains to stigma, is:
a.
Xenogamy
b.
Geitonogamy
c.
Chasmogamy
d.
Cleistogamy
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Match Column-I with Column-II and choose the correct answer from options given below:
Column-I:
(a) Nitrococcus
(b) Thiobacillus
(c) Nitrobacter
(d) Rhizobium
Column-II:
(i) Conversion of ammonia to nitrite
(ii) Denitrification
(iii) Conversion of nitrite to nitrate
(iv) Conversion of atmospheric nitrogen to ammonia
a.
(1) (ii) (iv) (i) (iii)
b.
(2) (i) (ii) (iii) (iv)
c.
(3) (iii) (i) (iv) (ii)
d.
(4) (iv) (iii) (ii) (i)
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Now a days it is possible to detect the mutated gene causing cancer by allowing radioactive probe to hybridise its complimentary DNA in a clone of cells, followed by its detection using autoradiography because :
a.
mutated gene partially appears on a photographic film
b.
mutated gene completely and clearly appears on a photographic film
c.
mutated gene does not appear on a photographic film as the probe has no complementarity with it
d.
mutated gene does not appear on photographic film as the probe has complementarity with it
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Match List-I with List-II.
List-I:
(a) S phase
(b) G2 phase
(c) Quiescent stage
(d) G1 phase
List-II:
(i) Proteins are synthesized
(ii) Inactive phase
(iii) Interval between mitosis and initiation of DNA replication
(iv) DNA replication
Choose the correct answer from the options given below.
a.
(1) (iii) (ii) (i) (iv)
b.
(2) (iv) (ii) (iii) (i)
c.
(3) (iv) (i) (ii) (iii)
d.
(4) (ii) (iv) (iii) (i)
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Plasmid pBR322 has PstI restriction enzyme site within gene ampR that confers ampicillin resistance. If this enzyme is used for inserting a gene for β-galactoside production and the recombinant plasmid is inserted in an E. coli strain:
a.
(1) It will not be able to confer ampicillin resistance to the host cell
b.
(2) The transformed cells will have the ability to resist ampicillin as well as produce β-galactoside
c.
(3) It will lead to lysis of host cell
d.
(4) It will be able to produce a novel protein with dual ability
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The fruit fly has 8 chromosomes (2n) in each cell. During interphase of Mitosis if the number of chromosomes at G1 phase is 8, what would be the number of chromosomes after S phase?
a.
(1) 8
b.
(2) 16
c.
(3) 4
d.
(4) 32
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Match List-I with List-II:
(a) Metamerism
(b) Water canal system
(c) Comb plates
(d) Cnidoblasts
List-II:
(i) Ctenophora
(ii) Cnidaria
(iii) Annelida
(iv) Porifera
Choose the correct answer from the options given below.
a.
(1) (iv) (iii) (i) (ii)
b.
(2) (iii) (iv) (i) (ii)
c.
(3) (iii) (iv) (ii) (i)
d.
(4) (iv) (i) (ii) (iii)
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Match List - I with List - II
List-I (a) Metamerism (b) Water canal system (c) Ctenophora (d) Cnidoblasts
List-II (i) Ctenoplana (ii) Porifera (iii) Annelida (iv) Cnidaria
Choose the correct answer from the options given below.
a.
(1) (iv) (iii) (i) (ii)
b.
(2) (iii) (iv) (i) (ii)
c.
(3) (iii) (iv) (ii) (i)
d.
(4) (iv) (i) (ii) (iii)
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Match List-I with List-II.
List-I: (a) Vaults (b) IUDs (c) Vasectomy (d) Tubectomy
List-II: (i) Entry of sperm through Cervix is blocked (ii) Removal of Vas deferens (iii) Phagocytosis of sperms within the Uterus (iv) Removal of fallopian tube
Choose the correct answer from the options given below.
a.
(1) (iv) (ii) (i) (iii)
b.
(2) (i) (iii) (ii) (iv)
c.
(3) (ii) (iv) (iii) (i)
d.
(4) (iii) (i) (iv) (ii)
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With regard to insulin choose correct options.
(a) C-peptide is not present in mature insulin.
(b) The insulin produced by rDNA technology has C-peptide.
(c) The pro-insulin has C-peptide
(d) A-peptide and B-peptide of insulin are interconnected by disulphide bridges.
Choose the correct answer from the options given below
a.
(b) and (d) only
b.
(b) and (c) only
c.
(a), (c) and (d) only
d.
(a) and (d) only
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Match the following:
List-I (a) Physalia (b) Limulus (c) Ancylostoma (d) Pinctada
List-II (i) Pearl oyster (ii) Portuguese Man of War (iii) Living fossil (iv) Hookworm
a.
(ii) (iii) (i) (iv)
b.
(iv) (i) (iii) (ii)
c.
(ii) (iii) (iv) (i)
d.
(i) (iv) (iii) (ii)
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Match the following:
List-I (a) Physalia, (b) Limulus, (c) Ancylostoma, (d) Pinctada
List-II (i) Pearl oyster, (ii) Portuguese Man of War, (iii) Living fossil, (iv) Hookworm
a.
(a)-(ii), (b)-(iii), (c)-(i), (d)-(iv)
b.
(a)-(iv), (b)-(i), (c)-(iii), (d)-(ii)
c.
(a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
d.
(a)-(i), (b)-(iv), (c)-(iii), (d)-(ii)
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During the process of gene amplification using PCR, if very high temperature is not maintained in the beginning, then which of the following steps of PCR will be affected first?
a.
Annealing
b.
Extension
c.
Denaturation
d.
Ligation
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For effective treatment of the disease, early diagnosis and understanding its pathophysiology is very important. Which of the following molecular diagnostic techniques is very useful for early detection?
a.
Western Blotting Technique
b.
Southern Blotting Technique
c.
ELISA Technique
d.
Hybridization Technique
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Read the following statements:
(a) Metagenesis is observed in Helminths.
(b) Echinoderms are triploblastic and coelomate animals.
(c) Round worms have organ-system level of body organization.
(d) Comb plates present in ctenophores help in digestion.
(e) Water vascular system is characteristic of Echinoderms.
Choose the correct answer from the options given below.
a.
(c), (d) and (e) are correct
b.
(a), (b) and (c) are correct
c.
(a), (d) and (e) are correct
d.
(b), (c) and (e) are correct
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Veneral diseases can spread through : (a) Using sterile needles (b) Transfusion of blood from infected person (c) Infected mother to foetus (d) Kissing (e) Inheritance. Choose the correct answer from the options given below
a.
(a), (b) and (c) only
b.
(b), (c) and (d) only
c.
(b) and (c) only
d.
(a) and (c) only
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During muscular contraction which of the following events occur?
(a) 'H' zone disappears
(b) 'A' band widens
(c) 'I' band reduces in width
(d) Myosin hydrolyzes ATP, releasing the ADP and Pi
(e) Z-lines attached to actins are pulled inwards.
a.
(a), (c), (d), (e) only
b.
(a), (b), (c), (d) only
c.
(b), (c), (d), (e) only
d.
(b), (d), (e), (a) only
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Assertion (A): A person goes to high altitude and experiences 'altitude sickness' with symptoms like breathing difficulty and heart palpitations.
Reason (R): Due to low atmospheric pressure at high altitude, the body does not get sufficient oxygen.
In the light of the above statements, choose the correct answer from the options given below:
a.
Both (A) and (R) are true and (R) is the correct explanation of (A)
b.
Both (A) and (R) are true but (R) is not the correct explanation of (A)
c.
(A) is true but (R) is false
d.
(A) is false but (R) is true
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Identify the types of cell junctions that help to stop the leakage of the substances across a tissue and facilitation of communication with neighbouring cells via rapid transfer of ions and molecules.
a.
Gap junctions and Adhering junctions, respectively
b.
Tight junctions and Gap junctions, respectively
c.
Adhering junctions and Tight junctions, respectively
d.
Adhering junctions and Gap junctions, respectively
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Match List-I with List - II:
List - I: (a) Allen’s Rule (b) Physiological adaptation (c) Behavioural adaptation (d) Biochemical adaptation
List - II: (i) Kangaroo rat (ii) Desert lizard (iii) Marine fish at depth (iv) Polar seal
a.
(iv) (ii) (iii) (i)
b.
(iv) (i) (iii) (ii)
c.
(iv) (i) (ii) (iii)
d.
(iv) (iii) (ii) (i)
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Match List - I with List - II:
List - I: (a) Adaptive radiation (b) Convergent evolution (c) Divergent evolution (d) Evolution by anthropogenic action
List - II: (i) Selection of resistant varieties due to excessive use of herbicides and pesticides (ii) Bones of forelimbs in Man and Whale (iii) Wings of Butterfly and Bird (iv) Darwin Finches
a.
(iv) (iii) (ii) (i)
b.
(iii) (ii) (i) (iv)
c.
(ii) (i) (iv) (iii)
d.
(i) (iv) (iii) (ii)
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Statement I: The codon 'AUG' codes for methionine and phenylalanine. Statement II: 'AAA' and 'AAG' both codons code for the amino acid lysine. In the light of the above statements, choose the correct answer from the options given below.
a.
Both Statement I and Statement II are true
b.
Both Statement I and Statement II are false
c.
Statement I is correct but Statement II is false
d.
Statement I is incorrect but Statement II is true
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Following are the statements about prostomium of earthworm.
(a) It serves as a covering for mouth.
(b) It helps to open cracks in the soil into which it can crawl.
(c) It is one of the sensory structures.
(d) It is the first body segment.
Choose the correct answer from the options given below.
a.
(a), (b) and (c) are correct
b.
(a), (b) and (d) are correct
c.
(a), (b), (c) and (d) are correct
d.
(b) and (c) are correct
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