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97. Epiphytes that are growing on a mango branch is an example of which of the following?
(1) Commensalism
(2) Mutualism
(3) Predation
(4) Amensalism

96 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:

(1) Both statement I and statement II are correct
(2) Both statement I and statement II are incorrect
(3) Statement I is correct but statement II is incorrect
(4) Statement I is incorrect but statement II is correct

91 The complex II of mitochondrial electron transport chain is also known as:

(1) Cytochrome bc₁
(2) Succinate dehydrogenase
(3) Cytochrome c oxidase
(4) NADH dehydrogenase

67 The correct order of decreasing basic strength of the given amines is:

(1) N-methylaniline > benzenamine > ethanamine > N-ethylethanamine
(2) N-ethylethanamine > ethanamine > benzenamine > N-methylaniline
(3) N-ethylethanamine > ethanamine > N-methylaniline > benzenamine
(4) benzenamine > ethanamine > N-methylaniline > N-ethylethanamine

62 Given below are two statements:

Statement I: A hypothetical diatomic molecule with bond order zero is quite stable.
Statement II: As bond order increases, the bond length increases.

In the light of the above statements, choose the most appropriate answer from the options given below:

(1) Both Statement I and Statement II are true
(2) Both Statement I and Statement II are false
(3) Statement I is true but Statement II is false
(4) Statement I is false but Statement II is true

54. Dalton’s Atomic theory could not explain which of the following?

(1) Law of conservation of mass
(2) Law of constant proportion
(3) Law of multiple proportion
(4) Law of gaseous volume

52. Given below are two statements:

Statement I: Like nitrogen that can form ammonia, arsenic can form arsine.
Statement II: Antimony cannot form antimony pentoxide.

In the light of the above statements, choose the most appropriate answer from the options given below:

(1) Both Statement I and Statement II are correct
(2) Both Statement I and Statement II are incorrect
(3) Statement I is correct but Statement II is incorrect
(4) Statement I is incorrect but Statement II is correct

27. An unpolarized light beam travelling in air is incident on a medium of refractive index 1.73 at Brewster’s angle. Then–

(1) reflected light is completely polarized and the angle of reflection is close to 60°
(2) reflected light is partially polarized and the angle of reflection is close to 30°
(3) both reflected and transmitted light are perfectly polarized with angles of reflection and refraction close to 60° and 30°, respectively
(4) transmitted light is completely polarized with angle of refraction close to 30°

26. A parallel plate capacitor made of circular plates is being charged such that the surface charge density on its plates is increasing at a constant rate with time. The magnetic field arising due to displacement current is:

(1) zero at all places
(2) constant between the plates and zero outside the plates
(3) non-zero everywhere with maximum at the imaginary cylindrical surface connecting peripheries of the plates
(4) zero between the plates and non-zero outside

1. Nodal tissue
2. A special neural centre in the medulla oblongata
3. Adrenal medullary hormones
4. Adrenal cortical hormones

Choose the correct answer from the options given below:

(1) A, C and D Only

(2) A, B and D Only

(3) A, B and C Only

(4) A, B, C and D

1. Multicellular heterotrophs with cell wall made of chitin.
2. Heterotrophs with tissue/organ/organ system level of body organization.
3. Prokaryotes with cell wall made of polysaccharides and amino acids.
4. Eukaryotic autotrophs with tissue/organ level of body organization.
5. Eukaryotes with cellular body organization.

(1) Phenotypic ratio – 9:3:3:1

(2) Phenotypic ratio – 9:7

(3) Phenotypic ratio – 1:2:1

(4) Phenotypic ratio – 3:1

1. Fusion of antherozoid with egg.
2. Attachment of gametophyte to substratum.
3. Reduction division to produce haploid spores.
4. Formation of sporophyte.
5. Release of antherozoids into water.

Choose the correct answer from the options given below:

(1) B, E, A, D, C

(2) D, E, A, B, C

(3) D, E, A, C, B

(4) B, E, A, C, D

1) Because of structural variation

(2) Its bioavailability will be increased

(3) Human body will elicit strong immune response

(4) It will be digested in Gastro-Intestinal (GI) tract

(1) Gibberellin

(2) Cytokinin

(3) Ethylene

(4) Abscisic acid

1) Homology, convergent

(2) Analogy, divergent

(3) Analogy, convergent

(4) Homology, divergent

(1) They were conceived through in vitro fertilization.

(2) They have 75% identical genetic content.

(3) They are monozygotic twins.

(4) They are fraternal twins.

(1) Vascular bundles are conjoint and closed.

(2) Phloem parenchyma is absent.

(3) Hypodermis is parenchymatous.

(4) Vascular bundles are scattered.

(1) Second digit of fore limb

(2) First digit of the fore limb

(3) First and Second digit of fore limb

(4) First digit of hind limb

(1) Cristae
(2) Endoplasmic Reticulum
(3) Mesosome
(4) Chromatophores

A.Restriction enzymes
B. DNA ligase
C. DNA mutase
D. DNA recombinase
E. DNA polymerase

Choose the correct answer from the options given below:

(1) D and E only
(2) B and C only
(3) C and D only
(4) A and B only

(1) Phenylalanine & Leucine
(2) Phenylalanine & Arginine
(3) Lysine & Arginine
(4) Leucine & Lysine

(1) Jacque Monod
(2) Franklin Stahl
(3) George Gamow
(4) Francis Crick

(1) Schizocoelomate
(2) Spongocoelomate
(3) Acoelomate
(4) Pseudocoelomate

(1) Cytochrome c oxidase
(2) NADH dehydrogenase
(3) Cytochrome bc₁
(4) Succinate dehydrogenase

(1) Complementary tRNA
(2) Non-complementary ssRNA
(3) Complementary dsRNA
(4) Inhibitory ssRNA

(1) Succinate dehydrogenase
(2) Catalase
(3) RuBisCo
(4) Carbonic anhydrase

(1) Cell-mediated Immunity
(2) Humoral Immunity
(3) Acquired Immunity
(4) Innate Immunity

(1) 1 Meiosis and 3 Mitosis
(2) No Meiosis and 2 Mitosis
(3) 2 Meiosis and 3 Mitosis
(4) 1 Meiosis and 2 Mitosis

(1) Chemical approach to study and understand living organisms.

(2) Behavioural approach to study and understand living organisms.

(3) Physico-chemical approach to study and understand living organisms.

(4) Physiological approach to study and understand living organisms.

(1) Nutrient absorption
(2) Gaseous exchange
(3) Sexual reproduction
(4) Asexual reproduction

1. The reductive division for the human female gametogenesis starts earlier than that of the male gametogenesis.
2. The gap between the first meiotic division and the second meiotic division is much shorter for males compared to females.
3. The first polar body is associated with the formation of the primary oocyte.
4. Luteinizing Hormone (LH) surge leads to disintegration of the endometrium and onset of menstrual bleeding.

Choose the correct answer from the options given below:

(1) B and D are true

(2) B and C are true

(3) A and B are true

(4) A and C are true

1. Respiration and Locomotion
   B. Excretion and Locomotion
   C. Capture and transport of food
   D. Digestion and Respiration
   E. Digestion and Excretion
2. Choose the correct answer from the options given below:(1) B and C Only
   (2) B, D, and E Only
   (3) A and B Only
   (4) A and C Only

(1) Liver disease treatment
(2) Removing clots from blood vessels
(3) Curd production
(4) Ethanol production

(1) Symbiotic
(2) Ectoparasite
(3) Free living
(4) Endoparasite

(1) Autosomal dominant pattern
(2) X-linked recessive inheritance pattern
(3) Mendelian inheritance pattern
(4) Non-Mendelian inheritance pattern

(1) Beer
(2) Rum
(3) Whisky
(4) Brandy

(1) Follicle-stimulating hormone (FSH)
(2) Adenocorticotrophic hormone (ACTH)
(3) Luteinizing hormone (LH)
(4) Anti-diuretic hormone (ADH)

(1) Ram Udar
(2) Birbal Sahni
(3) S. R. Kashyap
(4) Ramdeo Misra

(1) Zoos and botanical gardens
(2) Protected areas
(3) National Park
(4) Wildlife Sanctuary

A. Azotobacter
B. Oscillatoria
C. Anabaena
D. Volvox
E. Nostoc

Choose the correct answer from the options given below:

(1) B only
(2) E only
(3) A only
(4) D only

(1) Pea
(2) Chilli
(3) Petunia
(4) Datura

1. 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:

(1) A, D, E only
(2) B, D, E only
(3) A, B, C only
(4) A, C, E only

1. It causes pupillary 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:

(1) A, C, and D Only
(2) D Only
(3) C and D Only
(4) B, C, and D Only

Choose the correct answer from the following:

(1) The statement is false for water but true for land
(2) The statement is false for both the environment
(3) The statement is true for water but false for land
(4) The statement is true for both the environment

1. 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 the second month.
   E. In human pregnancy the appearance of hair is usually observed in the fifth month.

Choose the correct answer from the options given below:

(1) B, C, D and E Only
(2) A, C, D and E Only
(3) A and E Only
(4) B and C Only

(1) Predation
(2) Amensalism
(3) Commensalism
(4) Mutualism

1. 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.Choose the correct answer from the options given below:(1) B, C, E only
   (2) C, D, E only
   (3) A, B, C only
   (4) B, C, D only

(1) Kidney and intestine
(2) Kidney and lower part of body
(3) Liver and intestine
(4) Liver and kidney

List I
A. Adenosine
B. Adenylic acid
C. Adenine
D. Alanine

List II
I. Nitrogen base
II. Nucleotide
III. Nucleoside
IV. Amino acid

Choose the option with all correct matches:

(1) A-III, B-II, C-I, D-IV
(2) A-II, B-III, C-I, D-IV
(3) A-III, B-IV, C-II, D-I
(4) A-III, B-II, C-IV, D-I

Assertion (A): All vertebrates are chordates but all chordates are not vertebrates.

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.

In the light of the above statements, choose the correct answer from the options given below:

(1) A is true but R is false
(2) A is false but R is true
(3) Both A and R are true and R is the correct explanation of A
(4) Both A and R are true but R is not the correct explanation of A

(1) Virus
(2) Phage
(3) Bacterium
(4) Yeast

(1) Seeds are absent.
(2) Gymnosperms have flowers for reproduction.
(3) Seeds are enclosed in fruits.
(4) Seeds are naked.

(1) Diapause
(2) Ovulation
(3) Menopause
(4) Menarche

(1) It is an enzyme involved in the photolysis of water.
(2) It catalyzes the carboxylation of RuBP.
(3) It is active only in the dark.
(4) It has higher affinity for oxygen than carbon dioxide.

A.A mass of proliferating cells
B. Rapid growth of cells
C. Invasion and damage to the surrounding tissue
D. Those confined to original location

Choose the correct answer from the options given below:

(1) A, B, D only
(2) B, C, D only
(3) A, B only
(4) A, B, C only

(1) Chromosome 1
(2) Chromosome 10
(3) Chromosome X
(4) Chromosome Y

Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A): A typical unfertilised, 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:

(1) A is true but R is false
(2) A is false but R is true
(3) Both A and R are true and R is the correct explanation of A
(4) Both A and R are true but R is NOT the correct explanation of A

93. 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:

(1) Statement I is correct but statement II is incorrect
(2) Statement I is incorrect but statement II is correct
(3) Both statement I and statement II are correct
(4) Both statement I and statement II are incorrect

(1) Apoenzyme
(2) Prosthetic group
(3) Cofactor
(4) Coenzyme

Q89: Given below are two statements:

Statement I: Benzenediazonium salt is prepared by the reaction of aniline with nitrous acid at 273 - 278 K. It decomposes easily in the dry state.

Statement II: Insertion of iodine into the benzene ring is difficult and hence iodobenzene is prepared through the reaction of benzenediazonium salt with KI.

In the light of the above statements, choose the most appropriate answer from the options given below:

(1) Statement I is correct but Statement II is incorrect.
(2) Statement I is incorrect but Statement II is correct.
(3) Both Statement I and Statement II are correct.
(4) Both Statement I and Statement II are incorrect.

(1) Law of multiple proportion
(2) Law of gaseous volume
(3) Law of conservation of mass
(4) Law of constant proportion

(1) The solution is ideal.

(2) The solution has volume greater than the sum of individual volumes.

(3) The solution shows positive deviation.

(4) The solution shows negative deviation.

56. Given below are two statements:

Statement I: Like nitrogen that can form ammonia, arsenic can form arsine.

In the light of the above statements, choose the most appropriate answer from the options given below:

(1) Statement I is correct but Statement II is incorrect.

(2) Statement I is incorrect but Statement II is correct.

(3) Both Statement I and Statement II are correct.

(4) Both Statement I and Statement II are incorrect.

Statement I: A hypothetical diatomic molecule with bond order zero is quite stable.

Statement II: As bond order increases, the bond length increases.

In the light of the above statements, choose the most appropriate answer from the options given below:

(1) Statement I is true but Statement II is false.

(2) Statement I is false but Statement II is true.

(3) Both Statement I and Statement II are true.

(4) Both Statement I and Statement II are false.