Question

If a codon is changes from ACC to CCC what would be the possible outcome

a.)New salt bridge in the peptide

b.)Beta sheet turn in Peptide

c.)Creation of truncated Peptide

d.) New disulfide bond in protein

The amber codon has been used to stop codon UAG to deliver new types of amino Acds to the cells. If this codon remains the same what molecule in the process of DNAtranslation can be altered in order to do this?

a.)tRNA

b.)mRNA

c)DNA

D.) Ribosome

Answer 1

1. ACC codes for Thr and CCC codes for proline.

Proline is known as a structural disrupter and often creates helix break or beta turns.

So correct answer is b.)Beta sheet turn in Peptide

2. The UAG codon is a stop codon because the stop codon is not recognized by any amino-acid charged tRNA , instead it is recognized by release factors which can bind and release the peptide formed during translation.

To change this aan altered tRNA needs to be generated which can recognize UAG codon and can bind to that codon. In that case even without changing the codon the translation can be altered.

ANswer is a) tRNA