Question

Match the RNA type with its function. 

• A. A-1, B-2, C-3, D-4
• B. A-2, B-3, C-4, D-1
• C. A-3, B-1, C-2, D-4
• D. A-1, B-3, C-2, D-4

Hint:

Prefixes often give away RNA function: 'sn' = small nuclear (splicing occurs in the nucleus), 'mi' = micro (small regulators/silencers), 'r' = ribosomal, 't' = transfer (transport).

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
Different classes of RNA molecules perform diverse and essential functions within the cell.
They act variously as messengers, structural components, adapters, and regulatory molecules.

Step 2: Detailed Explanation:
Let's match each RNA type to its primary cellular function.
- snRNA (Small nuclear RNA) (A): These molecules are key components of the spliceosome.
They are responsible for removing introns from pre-mRNA during RNA splicing.
Thus, A matches with 1.
- miRNA (MicroRNA) (B): These are small non-coding RNAs that play a crucial role in post-transcriptional regulation.
They bind to complementary sequences on target mRNAs, leading to gene silencing via translational repression or mRNA degradation.
Thus, B matches with 2.
- rRNA (Ribosomal RNA) (C): These RNAs associate with proteins to form the bulk of the ribosome structure.
They also carry out the catalytic activity (peptidyl transferase) of protein synthesis.
Thus, C matches with 3.
- tRNA (Transfer RNA) (D): These molecules function as adapters during translation.
They perform amino acid transport by carrying specific amino acids to the ribosome to match the mRNA codon.
Thus, D matches with 4.

Step 3: Final Answer:
Matching these pairs gives the sequence: A-1, B-2, C-3, D-4.
This corresponds to option (A).