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Q. 87 A population of Bees develops resistance to pesticides and the trait gets fixed within a few generations. This is an example of (A) macroevolution. (B) disruptive selection. (C) […]

Q.86 Acorn worms (Saccoglassus sp.) belong to which ONE of the following Phyla? (A) Platyhelminthes (B) Achelminthes (C) Hemichordata (Chordata) (D) Annelida Acorn worms, including species like Saccoglossus, belong to the […]

Q.85 Match the antibiotics given in Group I with appropriate targets from Group II. Group I (P) Nalidixic acid (Q) Tetracycline (R) Erythromycin (S) Rifampin Group II (I) RNA polymerase […]

Q.84 Match the cell structure components given in Group I with appropriate functions from Group II. Group I (P) Cell membrane (Q) Purple membrane (R) Cisternae (S) Outer membrane Group […]

Q. 83 The growth profile of E. coli on glucose plus lactose is shown below. The specific growth rate of the second exponential phase is ____ 𝐡−𝟏. Diauxic growth in E. […]

Q. 82 If a bacterial cell contains 5,000 genes and if the average mutation frequency per gene is 𝟐 × 𝟏𝟎−𝟒 per generation, the average number of new mutations per […]

Q. 81 Nitrogenase reduces 𝐍𝟐 to 𝐍𝐇𝟑. Metal co-factors required for this activity are ____ . (A) Fe&Cu (B) Mo&Fe (C) Mo & Mn (D) Cu&Mn Nitrogenase, the enzyme responsible […]

Q. 80 E. coli requires three genes, galK (kinase), galT (transacetylase) and galE (epimerase) to utilize galactose. If there is a mutation in any one of these genes, the mutant […]

Q. 79 The decimal reduction time ( 𝐃𝟏𝟐𝟏 ) for Clostridium botulinum spores is 0.2 min . The time required to reduce the spore count from 𝟏𝟎𝟏𝟐 to one spore […]

Q.78 Which one of the following enzyme combinations allows some bacteria to utilize acetate through glyoxylate pathway? (P) Isocitrate lyase (Q) Isocitrate dehydrogenase (R) Succinyl CoA synthetase (S) Malate synthase […]