The complex II of mitochondrial electron transport chain is also known as
a.
Cytochrome bc1
b.
Succinate dehydrogenase
Correct Answer
c.
Cytochrome c oxidase
d.
NADH dehydrogenase
Step-by-Step AI Explanation
Verified Method
Complex II of the ETC is succinate dehydrogenase, which links the TCA cycle to the electron transport chain.
Q92mcq
Polymerase chain reaction (PCR) amplifies DNA following the equation.
a.
N2
b.
2^n
Correct Answer
c.
2n + 1
d.
2N2
Step-by-Step AI Explanation
Verified Method
PCR amplification follows exponential growth represented by 2 to the power of n cycles.
Q93mcq
What are the potential drawbacks in adoption of the IVF method?
A. High fatality risk to mother
B. Expensive instruments and reagents
C. Husband/wife necessary for being donors
D. Less adoption of orphans
E. Not available in India
F. Possibility that the early embryo does not survive
Choose the correct answer from the options given below:
a.
B, D, F only.
Correct Answer
b.
A, C, D, F only
c.
A, B, C, D only
d.
A, B, C, E, F only
Step-by-Step AI Explanation
Verified Method
NCERT highlights that IVF is expensive, requires specialized skills, and involves social issues like the availability of embryos or adoption concerns.
Q94mcq
What is the name of the blood vessel that carries deoxygenated blood from the body to the heart in a frog?
a.
Aorta
b.
Pulmonary artery
c.
Pulmonary vein
d.
Vena cava
Correct Answer
Step-by-Step AI Explanation
Verified Method
In frog anatomy, the vena cava (superior and inferior) collects deoxygenated blood from the body and pours it into the sinus venosus.
Q95mcq
Which one of the following statements refers to Reductionist Biology?
a.
Physico-chemical approach to study and understand living organisms.
Correct Answer
b.
Physiological approach to study and understand, living organisms.
c.
Chemical approach to study and understand living organisms.
d.
Behavioural approach to study and understand living organisms.
Step-by-Step AI Explanation
Verified Method
Reductionism in biology is the approach of studying life by breaking it down into molecular/physico-chemical components.
Q96mcq
Given below are two statements:
Statement I: In the RNA world, RNA is considered the first genetic material evolved to carry out essential life processes. RNA acts as a genetic material and also as a catalyst for some important biochemical reactions in living systems. Being reactive, RNA is unstable.
Statement II: DNA evolved from RNA and is a more stable genetic material. Its double helical strands being complementary, resist changes by evolving repairing mechanism.
In the light of the above statements, choose the most appropriate answer from the options given below:
a.
Both statement I and statement II are correct
Correct Answer
b.
Both statement I and statement II are incorrect
c.
Statement I is correct but statement II is incorrect
d.
Statement I is incorrect but statement II is correct
Step-by-Step AI Explanation
Verified Method
Both statements accurately reflect current evolutionary biological understanding found in NCERT textbooks regarding the RNA world hypothesis.
Q97mcq
Epiphytes that are growing on a mango branch is an example of which of the following?
a.
Commensalism
Correct Answer
b.
Mutualism
c.
Predation
d.
Amensalism
Step-by-Step AI Explanation
Verified Method
Epiphytes (like orchids) benefit by getting support, while the mango tree is neither harmed nor benefited, fitting the definition of commensalism (+/0).
Q97mcq
Epiphytes that are growing on a mango branch is an example of which of the following?
a.
Commensalism
Correct Answer
b.
Mutualism
c.
Predation
d.
Amensalism
Step-by-Step AI Explanation
Verified Method
Commensalism is an interaction where one species benefits (epiphyte gets space and light) and the other is neither harmed nor benefited (mango tree).
Q98mcq
From the statements given below choose the correct option:
A. The eukaryotic ribosomes are 80S and prokaryotic ribosomes are 70S.
B. Each ribosome has two sub-units.
C. The two sub-units of 80S ribosome are 60S and 40S while that of 70S are 50S and 30S.
D. The two sub-units of 80S ribosome are 60S and 20S and that of 70S are 50S and 20S.
E. The two sub-units of 80S are 60S and 30S and that of 70S are 50S and 30S
a.
A, B, C are true
Correct Answer
b.
A, B, D are true
c.
A, B, E are true
d.
B, D, E are true
Step-by-Step AI Explanation
Verified Method
Eukaryotic ribosomes (80S) consist of 60S and 40S subunits, while prokaryotic (70S) consist of 50S and 30S subunits. Thus A, B, and C are correct.
Q99mcq
Which one of the following is an example of ex-situ conservation?
a.
National Park
b.
Wildlife Sanctuary
c.
Zoos and botanical gardens
Correct Answer
d.
Protected areas.
Step-by-Step AI Explanation
Verified Method
Ex-situ conservation involves protecting species outside their natural habitats, such as in zoos, botanical gardens, and seed banks.
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Given below are two statements:
Statement I: The primary source of energy in an ecosystem is solar energy.
Statement II: The rate of production of organic matter during photosynthesis in an ecosystem is called net primary productivity (NPP).
In the light of the above statements, choose the most appropriate answer from the options given below:
a.
Both statement I and statement II are correct
b.
Both statement I and statement II are incorrect
c.
Statement I is correct but statement II is incorrect
d.
Statement I is incorrect but statement II is correct
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Match List-I with List-II.
List-I: A. Emphysema, B. Angina Pectoris, C. Glomerulo-nephritis, D. Tetany
List-II: I. Rapid spasms in muscle due to low Ca++ in body fluid, II. Damaged alveolar walls and decreased respiratory surface, III. Acute chest pain when not enough oxygen is reaching to heart muscle, IV. Inflammation of glomeruli of kidney
a.
A-III, B-I, C-IV, D-II
b.
A-III, B-I, C-II, D-IV
c.
A-II, B-IV, C-III, D-I
d.
A-II, B-III, C-IV, D-I
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Given below are two statement: One is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): Both wind and water pollinated flowers are not very colourful and do not produce nectar.
Reason (R): The flowers produce enormous amount of pollen grains in wind and water pollinated flowers.
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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Given below are two statements:
Statement I: In a floral formula ⊕ stands for zygomorphic nature of the flower, and G stands for inferior ovary.
Statement II: In a floral formula ⊕ stands for actinomorphic nature of the flower and G stands for superior ovary.
In the light of the above statements, choose the most appropriate answer from the options given below:
a.
Both statement I and statement II are correct
b.
Both statement I and statement II are incorrect
c.
Statement I is correct but statement II is incorrect
d.
Statement I is incorrect but statement II is correct
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While trying to find out the characteristic of a newly found animal, a researcher did the histology of adult animal and observed a cavity with presence of mesodermal tissue towards the body wall but no mesodermal tissue was observed towards the alimentary canal. What could be the possible coelome of that animal?
a.
Acoelomate
b.
Pseudocoelomate
c.
Schizocoelomate
d.
Spongocoelomate
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Cardiac activities of the heart are regulated by: A. Nodal tissue B. A special neural centre in the medulla oblongata C. Adrenal medullary hormones D. Adrenal cortical hormones
a.
A, B and C Only.
b.
A, B, C and D
c.
A, C and D Only
d.
A, B and D Only
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Given below are two statements: Statement I: Transfer RNAs and ribosomal RNA do not interact with mRNA. Statement II: RNA interference (RNAi) takes place in all eukaryotic organisms as a method of cellular defence.
a.
Both statement I and statement II are correct
b.
Both statement I and statement II are incorrect
c.
Statement I is correct but statement II is incorrect
d.
Statement I is incorrect but statement II is correct
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In the above represented plasmid an alien piece of DNA is inserted at EcoRI site. Which of the following strategies will be chosen to select the recombinant colonies?
a.
Using ampicillin & tetracyclin containing medium plate.
b.
Blue color colonies will be selected.
c.
White color colonies will be selected.
d.
Blue color colonies grown on ampicillin plates can be selected.
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Name the class of enzyme that usually catalyze the following reaction: S – G + S# → S + S# – G. Where, G → a group other than hydrogen, S → a substrate, S# → another substrate.
a.
Hydrolase
b.
Lyase
c.
Transferase
d.
Ligase
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The correct sequence of events in the life cycle of bryophytes is A. Fusion of antherozoid with egg. B. Attachment of gametophyte to substratum. C. Reduction division to produce haploid spores. D. Formation of sporophyte. E. Release of antherozoids into water.
a.
B, E, A, D, C
b.
A, B, C, D, E
c.
B, A, D, E, C
d.
C, D, A, B, E
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The correct sequence of events in the life cycle of bryophytes is: A. Fusion of antherozoid with egg. B. Attachment of gametophyte to substratum. C. Reduction division to produce haploid spores. D. Formation of sporophyte. E. Release of antherozoids into water.
a.
D, E, A, C, B
b.
B, E, A, C, D
c.
B, E, A, D, C
d.
D, E, A, B, C
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Which are correct: A. Computed tomography and magnetic resonance imaging detect cancers of internal organs. B. Chemotherapeutics drugs are used to kill non-cancerous cells. C. α-interferon activate the cancer patients’ immune system and helps in destroying the tumour. D. Chemotherapeutic drugs are biological response modifiers. E. In the case of leukaemia blood cells counts are decreased.
a.
B and D only
b.
D and E only
c.
C and D only
d.
A and C only
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Match List-I with List-II. List-I: A. Centromere, B. Cilium, C. Cristae, D. Cell membrane. List-II: I. Mitochondrion, II. Cell division, III. Cell movement, IV. Phospholipid Bilayer
a.
A-I, B-II, C-III, D-IV
b.
A-II, B-I, C-IV, D-III
c.
A-IV, B-II, C-III, D-I
d.
A-II, B-III, C-I, D-IV
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Match List-I with List-II. List-I: A. Chlorophyll a, B. Chlorophyll b, C. Xanthophylls, D. Carotenoids. List-II: I. Yellow-green, II. Yellow, III. Blue-green, IV. Yellow to Yellow-orange
a.
A-III, B-IV, C-II, D-I
b.
A-III, B-I, C-II, D-IV
c.
A-I, B-II, C-IV, D-III
d.
A-I, B-IV, C-III, D-II
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Find the correct statements: A. In human pregnancy, the major organ systems are formed at the end of 12 weeks. B. In human pregnancy the major organ systems are formed at the end of 8 weeks. C. In human pregnancy heart is formed after one month of gestation. D. In human pregnancy, limbs and digits develop by the end of second month. E. In human pregnancy the appearance of hair usually observed in the fifth month.
a.
A and E Only
b.
B and C Only
c.
B, C, D and E Only
d.
A, C, D and E Only
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Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): A typical unfertilized, angiosperm embryo sac at maturity is 8 nucleate and 7-celled. Reason (R): The egg apparatus has 2 polar nuclei. 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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Which of the following are the post-transcriptional events in an eukaryotic cell?
A. Transport of pre-mRNA to cytoplasm prior to splicing.
B. Removal of introns and joining of exons.
C. Addition of methyl group at 5’ end of hnRNA.
D. Addition of adenine residues at 3’ end of hnRNA.
E. Base pairing of two complementary RNAs.
a.
A, B, C only
b.
B, C, D only
c.
B, C, E only
d.
C, D, E only
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Each of the following characteristics represent a Kingdom proposed by Whittaker. Arrange the following in increasing order of complexity of body organization.
A. Multicellular heterotrophs with cell wall made of chitin.
B. Heterotrophs with tissue/organ/organ system level of body organization.
C. Prokaryotes with cell wall made of polysaccharides and amino acids.
D. Eukaryotic autotrophs with tissue/organ level of body organization.
E. Eukaryotes with cellular body organization.
a.
A, C, E, B, D
b.
C, E, A, D, B
c.
A, C, E, D, B
d.
C, E, A, B, D
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Match List-I with List-II.
List-I List-II
A. Alfred Hershey and Martha Chase I. Streptococcus Pneumoniae
B. Euchromatin II. Densely packed and dark-stained
C. Frederick Griffith III. Loosely packed and light-stained
D. Heterochromatin IV. DNA as genetic material confirmation
a.
A-II, B-IV, C-I, D-III
b.
A-IV, B-II, C-I, D-III
c.
A-IV, B-III, C-I, D-II
d.
A-III, B-II, C-IV, D-I
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Neoplastic characteristics of cells refers to:
A. A mass of proliferating cell
B. Rapid growth of cells
C. Invasion and damage to the surrounding tissue
D. Those confined to original location
a.
A, B only
b.
A, B, C only
c.
A, B, D only
d.
B, C, D only
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Given below are two statements:
Statement I: The DNA fragments extracted from gel electrophoresis can be used in construction of recombinant DNA.
Statement II: Smaller size DNA fragments are observed near anode while larger fragments are found near the wells in an agarose gel.
a.
Both statement I and statement II are correct
b.
Both statement I and statement II are incorrect
c.
Statement I is correct but statement II is incorrect
d.
Statement I is incorrect but statement II is correct
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Consider the following:
A. The reductive division for the human female gametogenesis starts earlier than that of the male gametogenesis.
B. The gap between the first meiotic division and the second meiotic division is much shorter for males compared to females.
C. The first polar body is associated with the formation of the primary oocyte.
D. Luteinizing Hormone (LH) surge leads to disintegration of the endometrium and onset of menstrual bleeding.
a.
A and B are true
b.
A and C are true
c.
B and D are true
d.
B and C are true
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Consider the following:
A. The reductive division for the human female gametogenesis starts earlier than that of the male gametogenesis.
B. The gap between the first meiotic division and the second meiotic division is much shorter for males compared to females.
C. The first polar body is associated with the formation of the primary oocyte.
D. Luteinizing Hormone (LH) surge leads to disintegration of the endometrium and onset of menstrual bleeding.
Choose the correct answer from the options given below:
a.
A and B are true
b.
A and C are true
c.
B and D are true
d.
B and C are true
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Given below are two statements: Assertion (A) and Reason (R).
Assertion (A): The primary function of the Golgi apparatus is to package the materials made by the endoplasmic reticulum and deliver it to intracellular targets and outside the cell.
Reason (R): Vesicles containing materials made by the endoplasmic reticulum fuse with the cis face of the Golgi apparatus, and they are modified and released from the trans face of the Golgi apparatus.
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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Match List I with List II.
List I | List II
A. Scutellum | I. Persistent nucellus
B. Non-albuminous seed | II. Cotyledon of Monocot seed
C. Epiblast | III. Groundnut
D. Perisperm | IV. Rudimentary cotyledon
a.
A-II, B-III, C-IV, D-I
b.
A-IV, B-III, C-II, D-I
c.
A-IV, B-III, C-I, D-II
d.
A-II, B-IV, C-III, D-I
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Given below are two statements: Assertion (A) and Reason (R).
Assertion (A): All vertebrates are chordates but all chordates are not vertebrate.
Reason (R): The members of subphylum vertebrata possess notochord, during the embryonic period, the notochord is replaced by a cartilaginous or bony vertebral column in adults.
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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Genes R and Y follow independent assortment. If RRYY produce round yellow seeds and rryy produce wrinkled green seeds, what will be the phenotypic ratio of the F2 generation?
a.
Phenotypic ratio - 1 : 2 : 1
b.
Phenotypic ratio - 3 : 1
c.
Phenotypic ratio - 9 : 3 : 3 : 1
d.
Phenotypic ratio - 9 : 7
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Match List - I with List - II.
List - I | List - II
A. Heart | I. Erythropoietin
B. Kidney | II. Aldosterone
C. Gastro-intestinal tracts | III. Atrial natriuretic factor
D. Adrenal Cortex | IV. Secretin
a.
A-II, B-I, C-III, D-IV
b.
A-IV, B-III, C-II, D-I
c.
A-I, B-III, C-IV, D-II
d.
A-III, B-I, C-IV, D-II
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Match List - I with List - II.
List - I List - II
A. Heart I. Erythropoietin
B. Kidney II. Aldosterone
C. Gastro-intestinal III. Atrial natriuretic factor
tracts IV. Secretin
Choose the correct answer from the options given below:
a.
A-II, B-I, C-III, D-IV
b.
A-IV, B-III, C-II, D-I
c.
A-I, B-III, C-IV, D-II
d.
A-III, B-I, C-IV, D-II
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Assertion (A): Cells of the tapetum possess dense cytoplasm and generally have more than one nucleus. Reason (R): Presence of more than one nucleus in the tapetum increases the efficiency of nourishing the developing microspore mother cells. In the light of the above statements, choose the most appropriate answer:
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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How many meiotic and mitotic divisions need to occur for the development of a mature female gametophyte from the megaspore mother cell in an angiosperm plant?
a.
2 Meiosis and 3 Mitosis
b.
1 Meiosis and 2 Mitosis
c.
1 Meiosis and 3 Mitosis
d.
No Meiosis and 2 Mitosis
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After maturation, in primary lymphoid organs, the lymphocytes migrate for interaction with antigens to secondary lymphoid organ(s)/tissue(s) like: A. thymus B. bone marrow C. spleen D. lymph nodes E. Peyer's patches. Choose the correct answer from the options given below:
a.
B, C, D only
b.
A, B, C only
c.
E, A, B only
d.
C, D, E only
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Given below are two statements: Statement I: Fig fruit is a non-vegetarian fruit as it has enclosed fig wasps in it. Statement II: Fig wasp and fig tree exhibit mutual relationship as fig wasp completes its life cycle in fig fruit and fig fruit gets pollinated by fig wasp. In the light of the above statements, choose the most appropriate answer:
a.
Both statement I and statement II are correct
b.
Both statement I and statement II are incorrect
c.
Statement I is correct but statement II is incorrect
d.
Statement I is incorrect but statement II is correct
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Consider the following statements regarding function of adrenal medullary hormones: A. It causes pupilary constriction B. It is a hyperglycemic hormone C. It causes piloerection D. It increases/strength of heart contraction. Choose the correct answer:
a.
C and D Only
b.
B, C and D Only
c.
A, C and D Only
d.
D Only
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Consider the following statements regarding function of adrenal medullary hormones: A. It causes pupilary constriction B. It is a hyperglycemic hormone C. It causes piloerection D. It increases strength of heart contraction. Choose the correct answer from the options given below:
a.
C and D Only
b.
B, C and D Only
c.
A, C and D Only
d.
D Only
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Match List-I with List-II. List-I: A. Pteridophyte, B. Bryophyte, C. Angiosperm, D. Gymnosperm. List-II: I. Salvia, II. Ginkgo, III. Polytrichum, IV. Salvinia. Choose the option with all correct matches.
a.
A-III, B-IV, C-II, D-I
b.
A-IV, B-III, C-I, D-II
c.
A-III, B-IV, C-I, D-II
d.
A-IV, B-III, C-II, D-I
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Match List-I with List-II. List-I: A. The Evil Quartet, B. Ex situ conservation, C. Lantana camara, D. Dodo. List-II: I. Cryopreservation, II. Alien species invasion, III. Causes of biodiversity losses, IV. Extinction. Choose the option with all correct matches.
a.
A-III, B-II, C-I, D-IV
b.
A-III, B-I, C-II, D-IV
c.
A-III, B-IV, C-II, D-I
d.
A-III, B-II, C-IV, D-I
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Role of the water vascular system in Echinoderms is: A. Respiration and Locomotion B. Excretion and Locomotion C. Capture and transport of food D. Digestion and Respiration E. Digestion and Excretion. Choose the correct answer from the options given below:
a.
A and B Only
b.
A and C Only
c.
B and C Only
d.
B, D and E Only
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Given below are two statements: Statement I: In ecosystem, there is unidirectional flow of energy of sun from producers to consumers. Statement II: Ecosystems are exempted from 2nd law of thermodynamics. In the light of the above statements, choose the most appropriate answer from the options given below:
a.
Both Statement I and Statement II are correct
b.
Both Statement I and Statement II are incorrect
c.
Statement I is correct but Statement II is incorrect
d.
Statement I is incorrect but Statement II is correct
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Which of the following enzyme(s) are NOT essential for gene cloning? A. Restriction enzymes B. DNA ligase C. DNA mutase D. DNA recombinase E. DNA polymerase. Choose the correct answer from the options given below :
a.
C and D only
b.
A and B only
c.
D and E only
d.
B and C only
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Which of the following enzyme(s) are NOT essential for gene cloning?
A. Restriction enzymes
B. DNA ligase
C. DNA mutase
D. DNA recombinase
E. DNA polymerase
a.
(1) C and D only
b.
(2) A and B only
c.
(3) D and E only
d.
(4) B and C only
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Read the following statements on plant growth and development. A. Parthenocarpy can be induced by auxins. B. Plant growth regulators can be involved in promotion as well as inhibition of growth. C. Dedifferentiation is a pre-requisite for re-differentiation. D. Abscisic acid is a plant growth promoter. E. Apical dominance promotes the growth of lateral buds. Choose the option with all correct statements.
a.
A, B, C only
b.
A, C, E only
c.
A, D, E only
d.
B, D, E only
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Read the following statements on plant growth and development:
A. Parthenocarpy can be induced by auxins.
B. Plant growth regulators can be involved in promotion as well as inhibition of growth.
C. Dedifferentiation is a pre-requisite for re-differentiation.
D. Abscisic acid is a plant growth promoter.
E. Apical dominance promotes the growth of lateral buds.
a.
(1) A, B, C only
b.
(2) A, C, E only
c.
(3) A, D, E only
d.
(4) B, D, E only
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Which of the following microbes is NOT involved in the preparation of household products?
A. Aspergillus niger
B. Lactobacillus
C. Trichoderma polysporum
D. Saccharomyces cerevisiae
E. Propionibacterium sharmanii
a.
(1) A and B only
b.
(2) A and C only
c.
(3) C and D only
d.
(4) C and E only
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Match List-I with List-II.
List-I (Hormone) | List-II (Source)
A. Progesterone | I. Pars intermedia
B. Relaxin | II. Ovary
C. Melanocyte stimulating hormone | III. Adrenal Medulla
D. Catecholamines | IV. Corpus luteum
a.
(1) A-IV, B-II, C-I, D-III
b.
(2) A-IV, B-II, C-III, D-I
c.
(3) A-II, B-IV, C-I, D-III
d.
(4) A-III, B-II, C-IV, D-I
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The blue and white selectable markers have been developed which differentiate recombinant colonies from non-recombinant colonies on the basis of their ability to produce colour in the presence of a chromogenic substrate. Given below are two statements about this method:
Statement I: The blue coloured colonies have DNA insert in the plasmid and they are identified as recombinant colonies.
Statement II: The colonies without blue colour have DNA insert in the plasmid and are identified as recombinant colonies.
a.
(1) Both Statement I and Statement II are correct
b.
(2) Both Statement I and Statement II are incorrect
c.
(3) Statement I is correct but Statement II is incorrect
d.
(4) Statement I is incorrect but Statement II is correct
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