It is possible to chemically modify the amino acid cysteine to alanine after it

Question

It is possible to chemically modify the amino acid cysteine to alanine after it has been covalently attached to a cysteine-tRNA. What would you expect the outcome of this modification when the cysteine charged tRNA is utilized in synthesis of a protein?

A. At an alanine codon, a cysteine amino acid would be incorporated into the growing polypeptide chain

B. At a cysteine codon, a cysteine amino amino would be incorporated into the growing polypeptide

C. At a cysteine codon, an alanine would be incorporated into the growing polypeptide.

D. No change in amino acid incorporation at either cysteine or alanine would occur

E. All of the Above

Explanation / Answer

I believe the correct answer to be:

C. At a cysteine codon, an alanine would be incorporated into the growing polypeptide.

since cysteine is being replaced by alanine.

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