Tag: GATE Life Science Previous Year Papers with Solutions

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 […]

Q67. Bacterial cell lysis by lysozyme is due to the Hydrolysis of α-1,4-glycosidic bonds between the N-acetylglucosamine and N-acetylmuramic acid Inhibition of cell wall synthesis Hydrolysis of pentapeptide bridges Hydrolysis […]

Q66. An electron microscope has higher resolution as compared to the light microscope. This is because (A) the wavelength of an electron is longer than the wavelength of light (B) […]

Q.65 In the context of plant development, which of the following statements are CORRECT? P. Cell migration is absent Q. Apoptosis plays a major role R. Pattern formation continues throughout […]

Q.64 Study the following diagram depicting the plant cell cycle and match the following Stages of Cell Cycle Type of Cyclin P. Late G1 phase 1. Cyclin B Q. Beginning […]

Q63. Which of the following statements in plant respiration are CORRECT? P. The oxidative Pentose Phosphate Pathway can accomplish the oxidation of glucose in the stroma of mitochondria Q. ATP […]