AP BIOLOGY

Detailed explanation-1: -The nucleus is the site for DNA replication and transcription. Translation is the process of synthesis of polypeptides by polymerization of amino acids on ribosomes using the mRNA triplets as a template. Ribosomes serve as the site of translation and the process takes place in the cytosol.

Detailed explanation-2: -Translation Translation takes place on ribosomes in the cell cytoplasm, where mRNA is read and translated into the string of amino acid chains that make up the synthesized protein.

Detailed explanation-3: -Three binding sites for tRNA in the ribosome are known: the A-site for aminoacyl-tRNA, the P-site for peptidyl-tRNA and the E-site for the deacylated tRNA leaving the ribosome.

Detailed explanation-4: -Three tRNA-binding sites are located on the ribosome, termed the A, P and E sites.

Detailed explanation-5: -Each ribosomal subunit has three binding sites for tRNA: designated the A (aminoacyl) site, which accepts the incoming aminoacylated tRNA; P (peptidyl) site, which holds the tRNA with the nascent peptide chain; and E (exit) site, which holds the deacylated tRNA before it leaves the ribosome.