Answer the following question.
Describe the structure and function of a t-RNA molecule. Why is it referred to as an adapter molecule?
t-RNA(transfer RNA) reads the genetic code on one hand & transfers amino acids on the other hand, so it is called an adapter molecule by Francis Crick. It is also called as soluble RNA (SRNA).
Structure of t-RNA :
The secondary structure of tRNA is clover leaf-like but the 3-D structure is inverted L-shaped. t-RNA has five arms or loops
- Anticodon loop: Which has bases complementary to the code.
- Amino acid acceptor end: To which amino acid binds.
- T-loop: Which helps in binding to the ribosome.
- D-loop: Which helps in binding aminoacyl synthetase.
- Variable loop: No function known.