Life Sciences
GATE XL format:mcq PYQs
Build your understanding with focused practice from past exam papers.
Questions 321–330 of 812. Imported answers require independent review unless marked reviewed.
Question 67
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Which one of the following mutagens convert DNA’s adenine to hypoxanthine?
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Which one of the following leucocytes are present in the largest proportion in healthy human blood?
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The site of photosynthesis in cyanobacteria is ____________.
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The antimicrobial activity of vancomycin is due to the ____________.
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 71
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Phenolics act as disinfectant by ____________.
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 74
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Nonsense suppressor mutation is found in ________________.
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Choose the correct match for structural components of bacteria to their function.
Structural component | Function
(P) Flagella | (i) prevent cell lysis
(Q) Cell wall | (ii) chemotaxis
(R) Metachromatic granules | (iii) storage for ATP
(S) Magnetosomes | (iv) cell orientation
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 76
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Match the pathogen with the appropriate disease.
Pathogen | Disease
(P) Streptococcus pyogenes | (i) Scarlet fever
(Q) Brucella species | (ii) Pott’s disease
(R) Mycobacterium tuberculosis | (iii) Traveler’s diarrhea
(S) Escherichia coli | (iv) Undulant fever
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 77
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Match the correct mode of cell division with respective bacteria.
Bacteria
(P) Streptomyces species
(Q) Rhodopseudomonas acidophila
(R) Bacillus subtilis
(S) Nocardia species
Mode of cell division
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 78
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The correct sequence of overall biochemical reaction which expresses the process of denitrification is ____
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