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) (i), (b) (iii), (c) (ii)
• (a) (ii), (b) (iii), (c) (i)
• (a) (iii), (b) (ii), (c) (i)
• (a) (ii), (b) (i), (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

RNA Polymerase and Product Correlation

This section details the association between specific RNA polymerases and the RNA molecules they produce. The explanation is as follows:

Section 1: RNA Polymerases and Their Synthesized Products

• RNA Polymerase I: Produces 18s rRNA, a crucial component of ribosomal RNA.
• RNA Polymerase II: Synthesizes hnRNA, the precursor to messenger RNA (mRNA) in eukaryotes.
• RNA Polymerase III: Generates SnRNAs (small nuclear RNAs), which are involved in mRNA splicing.

Section 2: Establishing the Matches

The following pairings link each RNA polymerase to its product:

• (a) RNA polymerase I: Synthesizes 18s rRNA. Correct match: (i) 18s rRNA.
• (b) RNA polymerase II: Synthesizes hnRNA. Correct match: (iii) hnRNA.
• (c) RNA polymerase III: Synthesizes SnRNAs. Correct match: (ii) SnRNAs.

Section 3: Summary of Matches

The accurate correlation is:

Option (A): (a) (i), (b) (iii), (c) (ii)

This indicates:

• (a) RNA polymerase I corresponds to 18s rRNA (i).
• (b) RNA polymerase II corresponds to hnRNA (iii).
• (c) RNA polymerase III corresponds to SnRNAs (ii).