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Q.74 Lysozyme catalyzes the breakdown of (A) NAG-NAM (B) lipopolysaccharide (C) teichoic acid (D) lipoprotein A Lysozyme specifically catalyzes the hydrolysis of β-1,4 glycosidic bonds between N-acetylglucosamine (NAG) and N-acetylmuramic […]

Q.73 The principle of immunization was first explained by (A) Edward Jenner (B) Elie Metchnikoff (C) Louis Pasteur (D) Robert Koch Edward Jenner first explained the principle of immunization through […]

Q.72 Which one of the following is NOT involved in horizontal gene transfer? (A) Conjugation (B) Transformation (C) Transduction (D) Mutation Horizontal gene transfer (HGT) involves DNA movement between organisms […]

Q.71 Oxygenases that catalyse the initial step in the degradation of polycyclic aromatic hydrocarbons by using molecular oxygen belong to which enzyme class? (A) Hydrolase (B) Transferase (C) Lyase (D) […]

Q.70 Rheumatic fever is an example of (A) autoimmune disease (B) type IV hypersensitive reaction (C) immunodeficiency disease (D) neurodegenerative disorder Rheumatic fever is a post-infectious autoimmune condition triggered by […]

Q.69 A bacterial culture (5 ×108 cells/ml) is maintained in a chemostat of working volume 10 L. If the doubling time of the bacteria is 50 min, the required rate […]

Q.68 Which one of the following proteins does NOT bind to a gaseous ligand? (A) Leghemoglobin (B) Carbonic anhydrase (C) Nitrogenase (D) NADPH oxidase Nitrogenase is the protein among the […]

Q.67 Intergenic suppression involves mutation in (A) rRNA (B) mRNA (C) tRNA (D) cDNA Intergenic suppression occurs when a mutation in one gene restores the function lost by a mutation […]

Q.66 Most viral capsids have (A) 08 faces (B) 12 faces (C) 16 faces (D) 20 faces Viral capsids, especially icosahedral ones common in most viruses, feature 20 triangular faces […]

Q.65 Match the definition (Column I) with the type of plant community (Column II) Column I Column II P. The process of occupation of a particular area by different plant […]