Q21. Classification of which chordate class is based on the presence or absence of certain openings in posterolateral or temporal regions of the skull?
A Amphibia B Reptilia C Aves D Mammalia E Question not attempted
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Correct answer: Reptilia
Q22. Which of the following cranial nerves are purely sensory in nature?
(a) Olfactory (I)
(b) Optic (II)
(c) Trigeminal (V)
(d) Vagus (X)
Options:
A (a) and (b) B (a) and (c) C (b) and (d) D (c) and (d) E Question not attempted
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Correct answer: (a) and (b)
Q23. Hormone produced by neurosecretory cells in the hypothalamus and then stored/released from the pituitary neurohypophysis is:
A Vasopressin B Adrenocorticotropic Hormone C Prolactin D Thyroid Stimulating Hormone E Question not attempted
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Correct answer: Vasopressin
Q24. Between Yellow Round (YYRR) and Green Wrinkled (yyrr) pea seed, in F₂ generation the possibility of heterozygous yellow round will be:
A 8/16 B 4/16 C 1/16 D 6/16 E Question not attempted
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Correct answer: 8/16
Q25. During ecological succession, when replacement of the existing community is caused largely by external abiotic factors, and not by the existing organisms, it is called:
A Autogenic succession B Allogenic succession C Secondary succession D Heterotrophic succession E Question not attempted
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Correct answer: Allogenic succession
Q26. Consider the following description of a flower and choose its correct floral formula:
Flower: Bracteate, actinomorphic, bisexual
Calyx: 5, gamosepalous
Corolla: 5, polypetalous
Androecium: 5, free anthers, epipetalous
Gynoecium: Ovary bicarpellary, apocarpous & superior
A Floral formula option (1) — as shown in question paper B Floral formula option (2) — as shown in question paper C Floral formula option (3) — as shown in question paper D Floral formula option (4) — as shown in question paper E Question not attempted
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Correct answer: Floral formula option (2) — as shown in question paper
Q27. Choose the INCORRECT pair:
A Protoplast fusion of two different species — Somatic hybrids B Callus — Differentiated mass of cells C Meristem culture — Virus-free plants D Pollen culture — Haploid plants E Question not attempted
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Correct answer: Callus — Differentiated mass of cells
Q28. Choose the incorrect statement:
(1) La Niña, a climate phenomenon characterized by notably cooler Sea Surface Temperatures (SST) in the central and eastern Pacific Ocean (opposite to El Niño), can significantly impact the Indian monsoon.
A La Niña, a climate phenomenon characterized by notably cooler Sea Surface Temperatures (SST) in the central and eastern Pacific Ocean (opposite to El Niño), can significantly impact the Indian monsoon. B During a La Niña event, very little rainfall is expected over India during the south-west monsoon season. C Most parts of the country receive above-normal rainfall during the La Niña years, except extreme north India and some areas over Northeast India, where rainfall below-normal is likely during the La Niña years. D Below-normal temperatures are generally observed during the winter season during the La Niña years. E Question not attempted
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Correct answer: During a La Niña event, very little rainfall is expected over India during the south-west monsoon season.
Q29. Choose the correct statement:
A Dolipore septa and clamp connections are not found in all Basidiomycetes fungi. B Cellulose is not found in the cell wall of Oomycetes fungi. C Both ascospores and basidiospores are developed exogenously. D Deuteromycetes fungi reproduce by both asexual and sexual methods. E Question not attempted
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Correct answer: Dolipore septa and clamp connections are not found in all Basidiomycetes fungi.
Q30. Select the INCORRECT statement with reference to gymnosperms:
A Endosperm is haploid. B Female gametophyte is multicellular. C Pollination is primarily by wind. D Microspores are produced in antheridia. E Question not attempted
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Correct answer: Microspores are produced in antheridia.
Q31. The production of 'Flavr Savr' tomatoes involved the use of antisense RNA technology to inhibit which enzyme?
A Polygalacturonase B ACC synthase C Pectin methyl esterase D β-galactosidase E Question not attempted
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Correct answer: Polygalacturonase
Q32. In mesogamy, pollen tube enters in the embryo-sac through:
A Chalaza B Integuments C Micropyle D Nucellus E Question not attempted
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Correct answer: Micropyle
Q33. In which of the following phenomenon, haploid embryos are formed naturally?
A Recurrent apomixis B Adventive embryony C Non-recurrent apomixis D Generative apospory E Question not attempted
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Correct answer: Non-recurrent apomixis
Q34. According to the pressure flow hypothesis, food moves in phloem due to:
A Osmosis only B Transpiration pull C Turgor pressure gradient D Diffusion pressure deficit E Question not attempted
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Correct answer: Turgor pressure gradient
Q35. Casparian strips are present in:
A Cortex B Endodermis C Pericycle D Pith E Question not attempted
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Correct answer: Endodermis
Q36. Using the codes given below, select the statements that are true for plant growth:
A: The initial few divisions in the zygote during embryogenesis are geometric.
B: Root elongation is an example of arithmetic growth.
C: Cells in culture media show only arithmetic growth.
A Only C B Both A and B C Both A and C D Both B and C E Question not attempted
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Correct answer: Both A and B
Q37. In plants, which part primarily perceives the stimulus of photoperiod?
A Meristem B Flower C Floral buds D Leaves E Question not attempted
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Correct answer: Leaves
Q38. In which of the following step of Krebs cycle, reduced NADH is NOT formed?
A Formation of Fumarate from Succinate B Formation of Oxaloacetate from Malate C Formation of α-ketoglutarate from Isocitrate D Formation of Succinyl-CoA from α-ketoglutarate E Question not attempted
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Correct answer: Formation of Fumarate from Succinate
Q39. Tetrogen “thalidomide” is responsible for the disease:
A Amelia B Congenital Rubella Syndrome C Congenital Toxoplasmosis D Microcephaly E Question not attempted
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Correct answer: Amelia
Q40. Renin is formed by:
A Cells in the macula densa B Juxtaglomerular cells C Cells of the peritubular capillary D Cells of PCT E Question not attempted
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Correct answer: Juxtaglomerular cells