Question

Study the items of Column-I and those of Column-II:

Choose the option that correctly matches the items of Column-I with those of Column-II:

• A. RNA polymerase I & (i) 18s rRNA
  \hline
• B. RNA polymerase II & (ii) SnRNAs
  \hline
• C. RNA polymerase III & (iii) hnRNA
  \hline \end{tabular} \end{table} Choose the option that correctly matches the items of Column-I with those of Column-II:
• D. (a) - (i), (b) - (ii), (c) - (iii)

Hint:

RNA polymerase I synthesizes rRNA (including 18S rRNA), RNA polymerase II synthesizes mRNA and snRNAs, and RNA polymerase III synthesizes tRNA and other small RNAs.

Answer 1

The Correct Option is A

Step 1: Understanding the functions of the RNA polymerases:
- RNA polymerase I: It is responsible for synthesizing rRNA, specifically the 18S rRNA. Thus, it is matched with (i) 18S rRNA.
- RNA polymerase II: It is responsible for synthesizing mRNA and some snRNA. Thus, it is matched with (ii) SnRNAs.
- RNA polymerase III: It is responsible for synthesizing tRNA and other small RNAs such as 5S rRNA and hnRNA. Thus, it is matched with (iii) hnRNA.
Step 2: Conclusion:
The correct match for the items in Column-I with those in Column-II is:
- (a) RNA polymerase I \(\rightarrow\) (i) 18S rRNA
- (b) RNA polymerase II \(\rightarrow\) (ii) SnRNAs
- (c) RNA polymerase III \(\rightarrow\) (iii) hnRNA
Thus, the correct answer is option (A).