A tRNA molecule has the anticodon sequence 3' GUU 5'. What amino acid will it be carrying?

	a.	Asn
	b.	Leu
	c.	Gln
	d.	Val

When the ribosome reaches a stop codon on the mRNA, no corresponding tRNA enters the A site. If the translation reaction were to be experimentally stopped at this point, before the binding of release factors, which of the following would you be able to isolate?

		separated ribosomal subunits, a polypeptide and free tRNA
		an assembled ribosome with a separated polypeptide
		separated ribosomal subunits with a polypeptide attached to the tRNA
		an assembled ribosome with a polypeptide attached to the tRNA in the P site.

Solutions

Expert Solution

1. c) Gln

The corresponding codon for anticodon 3'GUU5' is 5' CAA 3' and the corresponding amino acid is Gln.

2. d) an assembled ribosome with a polypeptide attached to the tRNA in the P site.

Release factor is a protein that facilitates the termination of translation by recognizing the termination codon. They release the newly synthesized peptide from the ribosome.

gladiator answered 1 year ago

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