Life Sciences
GATE XL topic:microbial-genetics PYQs
Build your understanding with focused practice from past exam papers.
Questions 11–20 of 26. Imported answers require independent review unless marked reviewed.
Question 71
Open questionXL-SMCQ1 markNeeds review
Catabolite repression in bacteria is regulated by the concentration of
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Open questionXL-SMCQ2 marksNeeds review
Which one of the following conjugations will result in formation of meroploids?
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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 83
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The spontaneous and induced mutations in bacteria can be distinguished 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 98
Open questionXL-TMSQ2 marksNeeds review
The presence of excess glucose has been known to prevent the induction of lac operon as well as other operon controlling enzymes involved in carbohydrate metabolism in E. coli. Which of the following processes define(s) the phenomenon?
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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 67
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Which one of the following mutagens convert DNA’s adenine to hypoxanthine?
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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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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 82
Open questionXL-SNAT2 marksNeeds review
If the plasmid given below is digested with restriction enzymes HindIII and EcoRI, considering complete digestion, how many DNA fragments will be released?
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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 9
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Which of the following event(s) would contribute to the induction of lac operon in a wild-type strain of E. coli?
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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 10
Open questionXL-SNAT1 markNeeds review
One mole of a circular bacterial plasmid was digested with a high-fidelity restriction enzyme. The plasmid has five restriction sites for the enzyme used. The number of moles of fragments released upon cleavage at all sites is ________.
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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 16
Open questionXL-SMCQ2 marksNeeds review
The rate of appearance of recombinant E. coli strains containing different genes after a mating between Hfr and F⁻ strains is shown in the graph (left). The approximate location of different genes (p, q, r, s, t, x, and y) along the Hfr chromosome is also shown (right). Based on this information, identify the recombinants X, Y and Z.
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