GATE 2023 BT – Question 25
Match the types of RNA in Group I with their corresponding function in Group II.
| Group I | Group II |
|---|---|
| P. mRNA | 1. Serves as adaptors between mRNA and amino acids during protein synthesis |
| Q. rRNA | 2. Regulates post-transcriptional gene expression |
| R. miRNA | 3. Codes for proteins |
| S. tRNA | 4. Forms the core of the ribosome structure and catalyzes protein synthesis |
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Show answer and explanation
Correct answer: (A) P-3, Q-4, R-2, S-1
Explanation
Match each RNA with its role.
- **P. mRNA:** carries the genetic code from DNA and is translated into protein. P-3.
- **Q. rRNA:** forms the structural and catalytic core of the ribosome, catalysing peptide-bond formation (the ribosome is a ribozyme). Q-4.
- **R. miRNA:** a short non-coding RNA that regulates gene expression after transcription by pairing with mRNAs and blocking translation or causing their degradation. R-2.
- **S. tRNA:** the adaptor that carries an amino acid and reads the codon through its anticodon. S-1.
Match: **P-3, Q-4, R-2, S-1** (option A).