Tag: GATE Life Science Previous Year Papers with Solutions

Q.72 Which ONE of the following statements about E.coli is NOT true ?(A) E.coli was the first disease- causing bacterium identified by Robert Koch(B) E.coli is part of the normal […]

Q.71 A rich medium is inoculated with a bacterium that divides every 30 minutes. The number of bacteria at the end of 50 hours is Options: (A) 2 × 1010 […]

Q.70 An E.coli mutant constitutive for the lac operon was mated with a wild type strain. The merodiploidthus obtained was inducible by lactose. This observation indicates that the original mutation is(A) […]

Q.69 Which ONE of the following mutants is used to carry out genetic analysis to determine the functionof an essential gene?(A) Knock out mutant (B) Deletion mutant(C) Insertion mutant (D) Temperature […]

Q.68 An auxotrophic mutant arises spontaneously in a wild type E.coli culture growing in a rich medium.Which ONE of the following techniques will ensure the isolation of the auxotrophic mutant?(A) Replica […]

Q.67 Bergey’s Manual of Systematic Bacteriology groups bacteria into species according to their(A) nutritional requirement(B) phylogenetic relationships(C) pathogenic properties(D) morphology Bergey’s Manual of Systematic Bacteriology groups bacteria into species according to […]

Q.66 Which ONE of the following components is NOT an electron acceptor during anaerobic respiration?(A) Lactate (B) Carbonate (C) Nitrate (D) Sulphate Carbonate is NOT an electron acceptor during anaerobic respiration.​ […]

Q.65 Match the name of the disease with the causal organism. Disease Causal organism P. Black rot of sugarcane Q. Stem rot of jute R. Tikka disease of groundnut S. […]

Q.64 Which of the following statements are TRUE for respiration?P. The conversion of one molecule of pyruvate to three molecules of CO2 generates fourmolecules of NADHQ. Fructose 6-phospate is the principal […]

Q.63 Identify the CORRECT statements in plant secondary metabolism.P. Tropane alkaloids in Atropa belladonna are synthesized from tyrosineQ. Antioxidative food ingredient rosmarinic acid is obtained from cell suspension cultures ofColeus blumeiR. […]