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42. Which of the following reduces the transpiration rate when applied to aerial parts of plants? (A) Phosphon-D (B) Paraquat (C) Phenyl mercuric acetate (D) Valinomycin Understanding Transpiration and Antitranspirants […]

41. Identify the CORRECT family possessing the following characters: presence of glucosinolates, tetradynamous stamens, superior ovary with parietal placentation and siliqua type fruit (A) Brassicaceae (B) Capparidaceae (C) Fumariaceae (D) […]

40. Which of the following techniques is NOT applicable for evaluating the expression of a transgene? (A) Northern blot (B) RT-PCR (C) Western blot (D) Southern blot Which Technique Is […]

39. During fatty acid biosynthesis, the first intermediate malonyl-CoA is formed from (A) Acetyl- CoA and bicarbonate (B) Two acetyl- CoA molecules (C) Acetyl- CoA and biotin (D) Palmitoyl CoA […]

38. Double haploids in plants can be induced by (A) Mitomycin-C (B) Mirin (C) Colchicine (D) 5-Azacytidine Double haploids represent a breakthrough in plant breeding, enabling rapid development of homozygous […]

37. An organized and differentiated cell having cytoplasm but no nucleus is found in (A) Companion cell (B) Xylem parenchyma (C) Sieve tube element (D) Phloem parenchyma Here’s a complete, […]

36. Nuclear membrane is absent in (A) Chlamydomonas (B) Nostoc (C) Volvox (D) Chlorella Nostoc lacks a nuclear membrane as the only prokaryote among the options. Chlamydomonas, Volvox, and Chlorella […]

35. Given below are the maps of a 1200 base pairs (bp) long DNA insert and a 3000 bp expression vector. The BamHI(𝐵) and HindIII ( 𝐻 ) restriction sites […]

34. A cell suspension was subjected to membrane disruption followed by differential centrifugation to fractionate the cellular components. Match the centrifugal conditions in Column I to the appropriate subcellular components […]

33. A 1.2 kb DNA fragment was used as a template for PCR amplification using primers P1, P2, P3 and P4 as shown in the scheme below. The annealing positions […]