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Q.72 Which of the following methods are used for the identification ofmicroorganisms?(A) Nucleic acid hybridization(B) Southern blotting(C) 16s rRNA sequencing(D) Percentage G-C content All options (A), (B), (C), and (D) […]

Q.71 Phenolics act as disinfectant by ____________.(A) rupturing plasma membrane followed by leakage of cellular contents(B) bond formation between adjacent pyrimidine bases(C) forming adduct with amino acid and unsaturated fatty […]

Q.70 The antimicrobial activity of vancomycin is due to the ____________.(A) inhibition of nucleic acid synthesis(B) damage to the cytoplasmic membrane(C) inhibition of cell wall synthesis(D) regulation of DNA supercoiling […]

Q.69 The site of photosynthesis in cyanobacteria is ____________.(A) Chloroplast(B) Chromatophores(C) Thylakoids(D) Chlorosomes The site of photosynthesis in cyanobacteria is thylakoids. This holds true for competitive exams like CSIR NET […]

Q.68 Which one of the following leukocytes are present in the largest proportion inhealthy human blood?(A) Neutrophils(B) Eosinophils(C) Basophiles(D) Monocytes Neutrophils constitute the largest proportion of leukocytes in healthy human […]

Q.67 Which one of the following mutagens convert DNA’s adenine to hypoxanthine?(A) Ultraviolet light(B) Mitomycin C(C) Methyl methanesulfonate(D) Nitrous acid Nitrous acid (option D) is the mutagen that converts DNA’s […]

Q.66 The terminal acceptor of electron during anaerobic respiration in Methanococcusis ______________.(A) Nitrate ion(B) Sulfate ion(C) Carbon dioxide(D) Oxygen The terminal electron acceptor in anaerobic respiration by Methanococcus is carbon […]

Q.65 A hypothetical plant gene ADSH22 is encoded by the nuclear genome. The lengthof the mature mRNA for ADSH22 is 2150 nucleotides (nts). This mRNA has a 270nts long 5′ […]

Q.64 When a true breeding tall plant containing red flowers was crossed with the truebreeding dwarf plant containing white flowers, all F1 plants were tall with redflowers. When the F1 […]

Q.63 Which of the following is/are phanerogamic parasite(s)?(A) Cuscuta reflexa(B) Orobanche cernua(C) Ocimum sanctum(D) Santalum album The phanerogamic parasites in this question are Cuscuta reflexa (A), Orobanche cernua (B) and Santalum album (D); Ocimum sanctum […]