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Q.51 Which one of the following agents causes the necrotic ring spot disease in stonefruits?(A) Fungi(B) Bacteria(C) Virus(D) Nematodes The necrotic ring spot disease in stone fruits is caused by […]

Q.50 Which one of the following commercially important carbohydrates is naturallyproduced only by the members of the plant kingdom?(A) Cellulose(B) Pectin(C) Chitin(D) Starch Pectin is the correct answer. This commercially important […]

Q.49 Correctly match the carnivorous plants (Group I) with the organs (Group II) they modify to trap the prey. Group I Group II (P) Pitcher plant (Nepenthes) (1) Leaf (Q) […]

Q.48 Which one of the following mature cell types is live but usually lacks nucleus?(A) Phloem parenchyma(B) Phloem companion(C) Phloem sieve element(D) Phloem–pole pericycle The correct answer is (C) Phloem […]

Q.47 Correctly match the names of the plant taxonomists (Group I) with the titles of the books they authored (Group II). Group I Group II (P) John Hutchinson (1) Classification […]

Q.46 E. coli is grown exclusively in a medium containing 15NH4Cl as the sole nitrogen source. Subsequently, the cells were shifted to a medium containing 14NH4Cl. The molar ratio of […]

Q.45 The DNA double helix measures 0.34 𝑛𝑚/𝑏𝑝. The diameter of a nucleosome coreparticle is 11 𝑛𝑚. If the ratio of wrapped DNA length to nucleosome diameter is4.51, the length […]

Q.44 The equilibrium dissociation constant of acetic acid is 1.74 × 10-5 𝑀. The 𝑝𝐾𝑎of acetic acid (rounded off to one decimal place) is _____ . The pKa of acetic […]

Q.43 Which of the following is/are heteropolysaccharide(s)?(A) Chondroitin–4–sulfate(B) Chitin(C) Cellulose(D) Heparin Chondroitin-4-sulfate and Heparin are heteropolysaccharides. Heteropolysaccharides consist of two or more different monosaccharide units, unlike homopolysaccharides made from a single […]

Q.42 Which of the following is/are peptide hormone(s)?(A) Calcitonin(B) Glucagon(C) Serotonin(D) Thyroxine Calcitonin and glucagon qualify as peptide hormones, making options (A) and (B) correct in this CSIR NET Life […]