MicroBiology

Transfer RNA is also known as tRNA or information adapter molecule. It is a very small sized RNA which is only about 73-95 nucleotides. But inspite of it smaller size it performs one of the most vital work of transferring the information. It acts as a direct interface between the information present in DNA and the amino acid sequence of protein. There are 20 different types of tRNA molecules. The structure of the tRNA is same in all the organisms. The tRNA of the human being can be used for the yeast cells.

The tRNA gas a 3’ terminal site which is used in the attachment of the amino acids. Aminoacyl tRNA synthetase categorizes the covalent linkage. It contains the anticodons, which are the 3 base regions which pair along with the corresponding 3 base region (codon) of messenger RNA. Each molecule of the tRNA can be attached with only single type of the amino acid, however as the genetic code contains number of codons by which the amino acid is specified, the tRNA molecules which have different anticodons can also carry the same amino acid.