Question:
The symbol "W" in the TWC stem-loop of the tRNA denotes which one of the following?
The symbol "W" in the TWC stem-loop of the tRNA denotes which one of the following?
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TWC stem-loop:
- T = Ribothymidine
- \(\Psi\) = Pseudouridine
- C = Cytidine
- This region is conserved in tRNA structure.
- T = Ribothymidine
- \(\Psi\) = Pseudouridine
- C = Cytidine
- This region is conserved in tRNA structure.
Updated On: Sep 1, 2026
- Pseudouridine
- Thiouridine
- Ribothymidine
- Inosine
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Verified By Collegedunia
The Correct Option is C
Solution and Explanation
Step 1: Understanding the Question:
This question tests knowledge of tRNA structure and modified bases.
Step 2: Detailed Explanation:
The TWC stem-loop is a conserved region in tRNA.
The letter "W" in TWC stands for ribothymidine (T).
The other symbols: \(\Psi\) denotes pseudouridine, and C denotes cytidine.
Thus, the sequence TWC = Ribothymidine-Pseudouridine-Cytidine.
Pseudouridine (A) is represented by \(\Psi\), not W.
Thiouridine (B) is a sulfur-containing modified base.
Inosine (D) is found in the anticodon loop.
Thus, the correct answer is ribothymidine.
Step 3: Final Answer:
Thus, the symbol "W" denotes ribothymidine, which corresponds to option (C).
[0.5cm]
This question tests knowledge of tRNA structure and modified bases.
Step 2: Detailed Explanation:
The TWC stem-loop is a conserved region in tRNA.
The letter "W" in TWC stands for ribothymidine (T).
The other symbols: \(\Psi\) denotes pseudouridine, and C denotes cytidine.
Thus, the sequence TWC = Ribothymidine-Pseudouridine-Cytidine.
Pseudouridine (A) is represented by \(\Psi\), not W.
Thiouridine (B) is a sulfur-containing modified base.
Inosine (D) is found in the anticodon loop.
Thus, the correct answer is ribothymidine.
Step 3: Final Answer:
Thus, the symbol "W" denotes ribothymidine, which corresponds to option (C).
[0.5cm]
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