CBSE 2023 · Region 1 · Set 1 · Q5 · 1 mark
Given below are two columns. In Column I is the list of four enzymes and in Column II is the list of functions of the given enzymes. Which one of the following options shows the enzymes matched with their respective functions correctly ? Column I (Enzyme) Column II (Function) P. DNA Ligase i. Removes nucleotides from ends of DNA Q. Restriction exonuclease ii. Extends primer on a DNA template R. Taq polymerase iii. Joins the DNA fragments S. Restriction endonuclease iv. Cuts DNA at a specific position
| Column I (Enzyme) | Column II (Function) | ||
| P. DNA Ligase | i. | Removes nucleotides from ends of DNA | |
| Q. Restriction exonuclease | ii. | Extends primer on a DNA template | |
| R. Taq polymerase | iii. | Joins the DNA fragments | |
| S. Restriction endonuclease | iv. | Cuts DNA at a specific position |
Official answer
From CBSE’s own marking scheme for this paper.
(D)
P-iii, Q-i, R-ii, S-iv
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CBSE Class 12 Biology past-paper question from the 2023board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.