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Match the items in Column I with Column II and select the correct option from the codes given below.
| Column I | Column II | ||
| A. | DNA ligase | 1. | Endonuclease that digests ss or ds DNA |
| B. | DNase I | 2. | Unpackaging DNA strands |
| C. | DNA topoisomerase | 3. | Catalyses the covalent bonds of segments of an interrupted sugar phosphate strand in ds DNA |
| D. | DNA helicase | 4. | Produces single or ds breaks in DNA during replication to release tension brought about by DNA uncoiling |
Codes
| A | B | C | D | |
| (a) | 1 | 2 | 3 | 4 |
| (b) | 4 | 3 | 2 | 1 |
| (c) | 3 | 1 | 4 | 2 |
| (d) | 2 | 4 | 1 | 3 |
