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Q.73 If the radius of a spherical coccus is 0.8 μm, the value of surface area volume in μm−1 will be (A) 7.45 (B) 4.05 (C) 3.75 (D) 0.85 Introduction […]

Q.72 Which one of the following DO NOT use water as an electron source during photosynthesis?(A) Sulfate reducing bacteria(B) Methanogenic bacteria(C) Green and purple bacteria(D) Nitrifying bacteria Methanogenic bacteria do […]

Q.71 The theoretical maximum number of ATP molecules produced from aerobic oxidation of glucoseby eukaryotic cells is(A) 38 (B) 24 (C)12 (D) 8 The theoretical maximum ATP yield from complete aerobic […]

Q.70 The most common indicator organism of faecal pollution in water is(A) Clostridium botulinum (B) Bacillus subtilis (C) Escherichia coli (D) Clostridium tetani Escherichia coli (E. coli) serves as the standard […]

Q.69 Which one of the following transport mechanism is NOT employed by prokaryotes? (A) Passive diffusion (B) Group translocation (C) Endocytosis (D) Active transport Prokaryotes lack the cytoskeletal machinery and […]

Q.68 Shine Dalgarno’s sequence present in mRNA binds to (A) 3′ end of rRNA (B) 5′ end of rRNA (C) 5′ end of tRNA (D) 3′ end of tRNA Shine-Dalgarno […]

Q.67 To which one of the following groups, the antibiotics kanamycin, streptomycin and gentamicinbelong(A) cephalosporins (B) macrolides (C) aminoglycosides (D) quinolones Kanamycin, streptomycin, and gentamicin are all aminoglycoside antibiotics that bind […]

Q.66 In 1976, Tonegawa’s experiment gave clue about gene rearrangement during differentiation of B-cells. The two different types of cells used in this experiment were(A) HeLa cells and fibrosarcoma cells(B) embryonic […]

Q.65 Identify two CORRECT statements from the following which are related to the ion transportationin the root system of plantP. The proton pumps and H+-pyrophosphatase appear to work in anti-parallel with […]

Q.64 Identify the correct matching by taking one item from each column. Column-I Column-II P. Coenzyme 1. Holoenzyme + Apoenzyme Q. Holoenzyme 2. Non-protein part in an active enzyme R. Prosthetic […]