1 TEST CODE : 4039 QUANTUM MOCK TEST – IX (AIIMS pattern) BIOLOGY HINTS 21. (a) 6. (c) Hint: Tadpole (Ammonotelic) = Maximum water required Frog and Dog (ureotelic) = Moderate water required Pigeon (Bird) uricotelic = Minimum water required Hint: Variola virus causes small pox. Chicken pox is caused by Varicella zoster. 10. (a) Hint: Only (i) is wrong. The proteins encoded by the genes crylAc and cryIIAb control the cotton bollworms while that encoded by crylAb controls the corn borer. 13. (b) Hint: (i) False; Yeast takes 90 minutes to complete one cell cycle (ii) False; Interphase lasts for 95% of the cell cycle (iii) True; It is replicated in ‘s’ phase (iv) True 23. (d) Hint: The figure represents Haplontic life cycle. All the given plants show haplo-diplontic life cycle. 24. (d) Hint: Primary spermatocytes undergo first meiotic division to produce secondary spermatocyte. Sperms become full motile and mature in accessory ducts. Mitochondria are present in the middle piece of sperm. Single ejaculate contains 200 – 300 million sperms. 15. (c) 27. (d) Hint: (i) False as fovea has only cones. (ii) False as stapes attaches at oval window. (iii) False – upper scala vestibuli and lower scala tympani. (iv) True Hint: Argemone is an example of parietal and china rose of axile. 16. (d) Hint: (i) False; To be taken for 21 days with a gap of 7 days (ii) True (iii) and (iv) false – cause mucus to thicken so that sperm entry is retarded. IUCD is the most widely accepted method in India. 17. (b) Hint: (i) False, replication is discontinuous. (ii) True (iii) Ligase needed frequently to join the Okazaki fragments. (iv) False; always polymerises in 5' 3' direction only. 20. (d) Hint: Powdery mildews is caused by Erysiphe. 29. (c) Hint: If the food is rough, it is covered by thin semipermeable peritrophic membrane secreted by midgut. Thus injury to the midgut is prevented. 32. (b) Hint: (ii) and (iv) are correct. Hashish is a hallucinogen and is not used clinically. Diazepam is a benzodiazepine. 33. (b) Hint: LDPs require a high ratio of Pfr to Pr for the formation of flowering stimulus. Blue color results in poor flowering. The most effective wave lengths are orange and red. 34. (d) Hint: Partial pressure of O2 in inspired air is about 159 mmHg and that of CO2 in alveoli 40 mmHg. (All the values as given in the NCERT). 36. (b) Hint: Carotid sinus is the baroreceptor located in the wall of internal carotid artery. 2 37. (a) Hint: Talus is tarsal bone. Joint between incus and malleus is saddle joint. 44. (b) A and R are correct but R is not correct explanation of A. 45. (c) Hint.: A is true; R is false 46. (d) Both false 48. (d) (both false) 49. (c) Hint: In the majority of plants the stomata opens in light (day time) and close in darkness (night). But in succulent reverse process is occurred. Both red and blue parts of light are effective though the latter is slightly more effective. Diagrammatic representation of stomatal opening and closing cycle. 53. (b) Hint.: Both are correct but the reason is not the correct explanation of the assertion. 55. (b). Hint: Both are correct but reason is not the correct explanation of the assertion. The walls of diatoms are embedded with silica and thus the walls are indestructible. 56. (d). Both assertion and reason are false statements. Mycoplasma can survive without oxygen. Mycoplasma are heterotrophic in nutrition. 58. (d) Hint: Cuscuta is a total stem parasite. 60. (d) Both false
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