Tag: GATE Life Science Previous Year Papers with Solutions

Q.87 Which one of the following is an example of sympatric speciation?(A) Origin of new species among wasps that pollinate figs(B) Emergence of a new species among finches that migrated to […]

Q.86 Which one of the following provides the strongest support for the theory of “descent withmodification”?(A) Early embryonic forms of diverse organisms (examples: fishes, birds and mammals) appearsimilar(B) Ability of fishes […]

Q.85 A bacterial population increases from 103 cells to 109 cells in 10 h. Calculate the number of generations per hour. (A) 20 (B) 10 (C) 4 (D) 2 Introduction […]

Q.84 How many electrons are accepted when sulfate acts as the terminal electron acceptor in bacteria such as Desulfovibrio? (A) 8 (B) 6 (C) 4 (D) 2 Sulfate (SO₄²⁻) is […]

Q.83 In a phenol coefficient test for determining the efficacy of a disinfectant X, the maximum effective dilution for X and phenol was found to be 1/450 and 1/90, respectively. […]

Q.82 Match the microscopes in Group I with their working principles in Group II Group I Group II P. Phase contrast Q. Dark field R. Bright field S. Electron microscopy I. […]

Q.81 Match the infectious agents in Group I with the associated diseases in Group II Group I Group II P. Bordetella pertussis Q. Mycobacterium leprae R. Haemophilus influenzae S. Rubella I. […]

Q.80 Match the scientists in Group I with their contributions in microbiology in Group II Group I Group II P. Robert Hooke Q. Paul Ehrlich R. Antony van Leeuwenhoek S. […]

Q.79 When the supply of tryptophan is plentiful, the tryptophan operon is repressed because the(A) repressor protein-corepressor complex is bound at the operator(B) repressor protein is synthesized in large quantity(C) repressor-corepressor […]

Q.78 In a population containing fast and slow growing bacteria, the slow growing bacteria can beenriched by supplementing the medium with(A) chloramphenicol (B) penicillin (C) penicillin & chloramphenicol (D) rifampin Penicillin […]