Matching RNA Polymerases with Their Products
The question asks to match the types of RNA polymerases with the RNA products they synthesize. Here's the detailed explanation:
Step 1: Understanding RNA Polymerases and Their Products
- RNA Polymerase I: This enzyme is responsible for synthesizing 18s rRNA (a part of the ribosomal RNA essential for ribosome function).
- RNA Polymerase II: This enzyme synthesizes hnRNA (heterogeneous nuclear RNA), which is the precursor to mRNA in eukaryotic cells.
- RNA Polymerase III: This enzyme synthesizes SnRNAs (small nuclear RNAs), which are involved in the splicing of mRNA.
Step 2: Matching the RNA Polymerases with Their Products
Now, let's match each RNA polymerase with its corresponding RNA product:
- (a) RNA polymerase I: This enzyme synthesizes 18s rRNA, so the correct match is (i) 18s rRNA.
- (b) RNA polymerase II: This enzyme synthesizes hnRNA, so the correct match is (iii) hnRNA.
- (c) RNA polymerase III: This enzyme synthesizes SnRNAs, so the correct match is (ii) SnRNAs.
Step 3: Conclusion
Thus, the correct matching is:
Option (A): (a) (i), (b) (iii), (c) (ii)
This means:
- (a) RNA polymerase I matches with 18s rRNA (i)
- (b) RNA polymerase II matches with hnRNA (iii)
- (c) RNA polymerase III matches with SnRNAs (ii)
