Life Sciences
2026 · Paper 1
Take it one question at a time. Try an answer, then check your understanding.
Complete GATE XL 2026 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 73–75 of 122. Imported answers require review unless explicitly marked reviewed.
Question 73
Open questionXL-SNAT1 markNeeds review
The decimal reduction time of Escherichia coli at a particular temperature is one minute. Assuming no bacterial growth and constant death rate, the time required for one million bacteria to get reduced to one viable bacterium is ____ minutes. (Answer in integer)
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Open questionXL-SMCQ2 marksNeeds review
Which one of the following options correctly matches the microbial names in Column I with their corresponding sources of epithet in Column II?
Column I Column II
(P) Klebsiella pneumoniae (i) causes spor in mice
(Q) Penicillium chrysogenum (ii) forms pus
(R) Salmonella typhimurium (iii) the disease it causes
(S) Streptococcus pyogenes (iv) produces a yellow pigment
Your answerChoose one option.
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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 75
Open questionXL-SMCQ2 marksNeeds review
Determine the correctness or otherwise of the following Assertion [a] and the Reason [r].
Assertion [a]: Silver and copper display bacteriocidal or antiseptic activity.
Reason [r]: Silver and copper effectively demonstrate oligodynamic action.
Your answerChoose one option.
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