Multiple choice

Which of the following arms of tRNA differentiates it into class I and class II tRNA?

  1. DHU arm

  2. Extra arm

  3. TΨC arm

  4. Anti-codon arm

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The length of extra arm differentiates tRNA into class I and class II types. Class I tRNA has a shorter extra arm, i.e. 3-5 base pairs long. Class II tRNA has a longer extra arm, i.e. 13-21 base pairs long.