Question

what determines the order of amino acids in a protein?
amino acids available in cell cytoplasm
order of nucleotides within a gene
enzymes present in the ribosomes

Explanation:

The sequence of nucleotides in a gene (DNA) is transcribed into mRNA, and then during translation, the mRNA sequence determines the order of amino - acids in a protein through the genetic code. The availability of amino - acids in the cytoplasm just provides the building blocks, and ribosome enzymes help in the process but do not determine the order.

Answer:

Order of nucleotides within a gene