What happens in each of the 3 sites (EPA) of the ribosome?

Expert Solution

Ribosomes are membrane organelles which are also called as protein factories. They are the only common organised between prokaryotes and eukaryotes foreign they are actively associated in the process of translation for the formation of proteins. Every ribosome is made of two subunits, large subunit and small subunit.

There are 3 sites on a ribosome, A (amino acyl site), P (peptidyl site) and E site (exit site), A and P are associated with both large and small subunit whereas E site is associated with only large subunit.

At A site, new tRNA molecule comes with amino acid which is to be added on the growing peptide chain. Formation of peptide bond also takes place at this site.

At P site, only the first initiated transfer RNA which carries the amino acid methionine comes and bind to it. Peptide chain is held at the site during the along ation process.

From E site, empty transfer RNA which does not contain any amino acid is exited from the ribosome.

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gladiator answered 2 years ago

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