Match the LIST-I with LIST-II
| LIST-I Enzymes | LIST-II Functions |
|---|---|
| A. RNA polymerase I | I. Transcribes mRNA |
| B. RNA polymerase III | II. DNA Replication |
| C. RNA polymerase II | III. Transcribes rRNA |
| D. DNA dependent DNA polymerase | IV. Transcribes tRNA |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → A-III, B-IV, C-I, D-II
(A) RNA polymerase I — this matches (III) Transcribes rRNA. In eukaryotes the nucleolus holds the rRNA genes, and RNA polymerase I transcribes the larger rRNAs (28S, 18S and 5.8S).
(B) RNA polymerase III — this matches (IV) Transcribes tRNA. It also transcribes 5S rRNA and the snRNAs.
(C) RNA polymerase II — this matches (I) Transcribes mRNA. It makes the precursor of mRNA, called hnRNA, which is then processed into the mature mRNA.
(D) DNA dependent DNA polymerase — this matches (II) DNA Replication. It uses a DNA template to make a new DNA strand, so it copies the genome before cell division.
NCERT Extract:
Transcription Unit and the Gene – “… (i) There are at least three RNA polymerases in the nucleus (in addition to the RNA polymerase found in the organelles). There is a clear cut division of labour. The RNA polymerase I transcribes rRNAs (28S, 18S, and 5.8S), whereas the RNA polymerase III is responsible for transcription of tRNA, 5srRNA, and snRNAs (small nuclear RNAs). The RNA polymerase II transcribes precursor of mRNA, the heterogeneous nuclear RNA (hnRNA).”