Which of the following is TRUE of translation? A) Protein synthesis is unidirectional B) Growing cells translate mRNA into protein at a rapid rate C) Addition of an amino acid to a growing polypeptide chain starts at the N-terminal group and ends in the C-terminal direction D) All of the above
Question
Which of the following is TRUE of translation? A) Protein synthesis is unidirectional B) Growing cells translate mRNA into protein at a rapid rate C) Addition of an amino acid to a growing polypeptide chain starts at the N-terminal group and ends in the C-terminal direction D) All of the above
Solution
The correct answer is D) All of the above.
Here's why:
A) Protein synthesis is unidirectional: This is true. Protein synthesis always proceeds from the N-terminal end to the C-terminal end of the protein. This means it starts from the amino end (N-terminal) and ends at the carboxyl end (C-terminal).
B) Growing cells translate mRNA into protein at a rapid rate: This is also true. The process of translation, where mRNA is decoded to produce a specific protein, is a fundamental part of cell growth and division. Therefore, it occurs at a rapid rate in growing cells.
C) Addition of an amino acid to a growing polypeptide chain starts at the N-terminal group and ends in the C-terminal direction: This is true as well. During protein synthesis, amino acids are added to the growing polypeptide chain in the direction from the N-terminal (amino end) to the C-terminal (carboxyl end).
Therefore, all of the statements A, B, and C are true, making D) All of the above the correct answer.
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