Question

Study the items of Column-I and those of Column-II:
Column-I Column-II
(a) RNA polymerase I (i) 18s rRNA
(b) RNA polymerase II (ii) SnRNAs
(c) RNA polymerase III (iii) hnRNA
Choose the option that correctly matches the items of Column-I with those of Column-II:

• A. (a)-(i), (b)-(ii), (c)-(iii)
• B. (a)-(iii), (b)-(ii), (c)-(i)
• C. (a)-(ii), (b)-(iii), (c)-(i)
• D. (a)-(i), (b)-(iii), (c)-(ii)

Hint:

RNA polymerase I is responsible for rRNA, RNA polymerase II for mRNA precursors (hnRNA), and RNA polymerase III for small RNAs like SnRNAs.

Answer 1

The Correct Option is D

Step 1: RNA polymerase I synthesizes ribosomal RNA, including 18s rRNA, so (a) matches with (i).
Step 2: RNA polymerase II synthesizes heterogeneous nuclear RNA (hnRNA), which is a precursor to mRNA, so (b) matches with (iii).
Step 3: RNA polymerase III synthesizes small nuclear RNAs (SnRNAs), so (c) matches with (ii).
Thus, the correct matching is (a)-(i), (b)-(iii), (c)-(ii).