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Q77. Superantigens elicit a very strong T cell response because they Bind to the specific antigen binding site on the T cell receptors (TCR) Bind to the site on T […]

Q76. Match the scientist from Group I with the corresponding contribution listed in Group II Group I Group II P. Robert Koch Q. Walter Hesse R. Louis Pasteur S. Ferdinand […]

Q75. The quickest way to determine bacterial growth in terms of viable cells is through Most probable number (MPN) technique Spread plate method Pour plate method Slide culture technique Here’s […]

Q74. A growing bacterial culture with a doubling time of 20 min reaches cell density of 2 × 108 cells/ml in 3 hours. How much time would it take to […]

Q.73.Pasteurization of milk is carried oul by (A) boiling for 5 min (B) heating at 63C for 15 min (C) heating at 72°C for 30 min (D) heating al 63C: […]

Q.72. The resistance of a lambda lysogenic E.coli to re-infection by lambda is mediated by (A) blocking entry of the incoming lambda DNA (B) degrading the incoming lambda DNA (C) […]

Q71. Wild type E. coli forms purple colored colonies on EMB-lactose plate. This is due to Increase in pH of the medium Decrease in pH of the medium Secretion of […]

Q70. Ames test is performed to detect Mutagen pH Nutrient stress Salinity Ames Test: Detects Mutagens in Q70 MCQ Explained The Ames test is a key microbiological assay primarily used […]

Q69. A mutant phenotype due to a nonsense mutation can be rescued by a mutation in tRNA gene. This rescue is an example of Induced mutation Suppressor mutation Spontaneous mutation […]

Q68. The recombination frequencies between three genes x, y and z are as follows: x-y: 2.6%, y-z: 1.4% and x-z: 1.2%. Then the gene order is x-z-y x-y-z y-x-z z-x-y […]