Tag: GATE Life Science Previous Year Papers with Solutions

Q82. A bacterial culture was diluted 1000 fold and 0.1 ml of this diluted sample was spread per plate on nutrient agar. In a triplicate run, the number of colonies […]

Q81. Match the pathogen in Group I with the corresponding disease in Group II Group I Group II P. Bacteria Q. Virus R. Fungi S. Protozoa 1. Measles 2. Candidiasis […]

Q80. Which one of the following events occurs in prokaryotes but NOT in eukaryotes? Protein phosphorylation RNA polymerase and promoter interaction Control of transcription by attenuation Formation of Okazaki fragments […]

Q79. In a lacOc lacZ− / lacO+ lacZ+ partial diploid, of the two lacZ enzymes, only the mutant enzyme (lacZ−) is synthesized constitutively. This observation shows that lacOc mutation is […]

Q78. MHC-I groove can be loaded with peptides of only 8–10 amino acids because MHC-I groove is closed on both ends Fragments of only 8–10 amino acids are generated in […]

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: […]