Question

in protein synthesis, what molecule determines the order of amino acids in a protein?
○ a. trna
○ b. mrna
○ c. rrna
○ d. dna

Explanation:

• tRNA (Transfer RNA): It brings amino acids to the ribosome during translation but does not determine the order of amino acids.
• mRNA (Messenger RNA): It is transcribed from DNA and contains the codon sequence. The codons on mRNA determine the order of amino acids in a protein during translation.
• rRNA (Ribosomal RNA): It is a component of ribosomes (along with proteins) and helps in the process of translation (like catalyzing peptide - bond formation) but does not determine the amino - acid order.
• DNA: It stores the genetic information. However, in protein synthesis, the information is first transcribed to mRNA, and it is mRNA that directly determines the amino - acid order in the protein (during translation).

Answer:

B. mRNA