t-RNA- the adapter molecule:
Scientists considered that there has to be a mechanism in which t-RNA will read the codon and also simultaneously binds with the amino acid as amino acid does not have any special capacity to read the codon. So t-RNA is considered as an adapter molecule.
Cloverleaf structure (2 dimensional) of t-RNA possess an anticodon loop that has bases complementary to the codon. It is called anticodon.
It shows amino acid acceptor end (3' end) having unpaired CCA bases (i.e. amino acid binding site) to which amino acid binds.
For every amino acid, there is specific t- RNA.
Initiator t-RNA is specific for methionine. There are no t-RNA's for stop codons.
In the actual structure, the t-RNA molecule looks like inverted L (3 dimentional structure).
