| Column I | Column II |
| i. DNA ligase | (p) Synthe size a DNA copy of RNA |
| ii. Alkaline phosphatase | (q) Forms a bond between 3' -OH and 5'-PO4 |
| iii. Reverse transcriptase | (r) Removes terminal PO, from 3' or 5'end of DNA |
| iv. Polynucleotide kinase | (s) Adds phosphate to 5'-OH end |