Life Sciences
2025 · Paper 1
Take it one question at a time. Try an answer, then check your understanding.
Complete GATE XL 2025 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 46–48 of 122. Imported answers require review unless explicitly marked reviewed.
Question 46
Open questionXL-QNAT2 marksNeeds review
E. coli is grown exclusively in a medium containing
as the sole nitrogen source. Subsequently, the cells were shifted to a medium containing
. The molar ratio of hybrid DNA (
-
) to light DNA (
-
) after four generations (rounded off to two decimal places) will be ____ .Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 47
Open questionXL-RMCQ1 markNeeds review
Correctly match the names of the plant taxonomists (Group I) with the titles of the books they authored (Group II).
Group I: (P) John Hutchinson; (Q) Adolf Engler and Karl Prantl; (R) Arthur Cronquist; (S) Alfred Barton Rendle.
Group II: (1) Classification of Flowering Plants; (2) Evolution and Classification of Flowering Plants; (3) Die Naturlichen Pflanzenfamilien; (4) The Families of Flowering Plants.
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 48
Open questionXL-RMCQ1 markNeeds review
Which one of the following mature cell types is live but usually lacks nucleus?
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