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Q28.A lambda phage genome has a length of (A) 12.5 kb(B) 24.5 kb(C) 42.5 kb(D) 84.5 kb Lambda phage genome length is approximately 48.5 kb, making option (C) 42.5 kb […]

Q27.A cloning vector may not contain (A) Origin of replication(B) Multiple cloning site(C) Promoter(D) Selectable marker The correct answer is (C) Promoter. A basic cloning vector requires ori, MCS, and selectable […]

Q26.Which of the following is not a vitamin? (A) Biotin(B) Choline(C) Histidine(D) Nicotinamide The correct answer is (C) Histidine. Histidine is one of the 20 standard proteinogenic amino acids essential for […]

Q25.The prokaryotic microorganism which fixes atmospheric nitrogen in symbiotic association under aerobic condition in aquatic ferns is- (A) Rhizobium(B) Klebsiella(C) Anabaena(D) Rhodospirillum The correct answer is (C) Anabaena. Anabaena azollae, a […]

Q24.The primary acceptor of CO₂ in C₄ plants is (A) Phosphoenolpyruvate(B) Ribulose 1, 4 diphosphate(C) Ribulose 1, 5 diphosphate(D) Phosphoenolglycerate The correct answer is (A) Phosphoenolpyruvate. In C₄ plants, PEP serves […]

Q23.The rate of oxygen production is enhanced when there is operation of (A) Cyclic photophosphorylation(B) Non-Cyclic photophosphorylation(C) Both Cyclic and Non-cyclic photophosphorylation(D) Oxidative phosphorylation The correct answer is (B) Non-Cyclic […]

Q22.Which one of the following phytochemicals produced in plants defend against herbivores? (A) Terpenes(B) Lignin(C) Flavonoids(D) Tannins The correct answer is (D) Tannins. Tannins are specialized phytochemicals that plants produce to […]

Q21.The gold standard method used for the detection of SARS-CoV-2 infection is (A) ELISA(B) RT-PCR(C) Microarray(D) FISH The correct answer is (B) RT-PCR. This remains the gold standard for detecting active […]

Q20.The method which was first developed for gene mapping in bacteria was (A) Transformation in 1928(B) Conjugation in 1946(C) Transduction in 1952(D) Transformation in 1944 The correct answer is (B) […]

Q19.Which of the following is NOT a characteristic feature of bony fishes? (A) Presence of paired fins(B) Laterally compressed body(C) Presence of homocercal tail(D) Presence of placoid scales Placoid scales […]