Match List-I with List-II
| List-I | List-II |
|---|---|
| Enzymes | Functions |
| (A). DNA polymerase | (I). Transcribes precursor of mRNA (hnRNA) |
| (B). DNA ligase | (II). Transcribes rRNAs |
| (C). RNA polymerase I | (III). Joins the DNA fragments |
| (D). RNA polymerase II | (IV). Catalyzes the polymerization of deoxynucleotides |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → (A) - (IV), (B) - (III), (C) - (II), (D) - (I)
(A) DNA polymerase — this matches (IV). Catalyzes the polymerization of deoxynucleotides. During replication, DNA polymerase joins deoxynucleotides one by one to build the new strand on the template, in the 5′→3′ direction.
(B) DNA ligase — this matches (III). Joins the DNA fragments. On the lagging strand DNA is made in small pieces (Okazaki fragments). DNA ligase seals these pieces into one strand; in genetic engineering it joins the gene to the vector.
(C) RNA polymerase I — this matches (II). Transcribes rRNAs. Eukaryotes have three RNA polymerases in the nucleus. RNA polymerase I makes the rRNAs (28S, 18S and 5.8S).
(D) RNA polymerase II — this matches (I). Transcribes precursor of mRNA (hnRNA). RNA polymerase II makes hnRNA, which is processed into mRNA. (RNA polymerase III makes tRNA, 5S rRNA and snRNAs.)