Question

1. which sequence of events correctly describes the process of protein synthesis?

a dna → transcription → mrna → translation → proteins produced
b dna → translation → mrna → transcription → proteins produced
c mrna → transcription → polypeptides form →translation →proteins produced
d mrna → translation → polypeptides form → transcription → proteins produced

Explanation:

Protein synthesis involves two main steps: transcription and translation. First, DNA is transcribed into mRNA (messenger RNA) in the nucleus. Then, the mRNA moves to the ribosome where translation occurs, converting the mRNA sequence into a polypeptide chain (which folds into a protein). Option A follows this correct sequence: DNA → transcription (to make mRNA) → mRNA → translation (to make proteins). Option B has DNA going to translation first, which is incorrect. Option C starts with mRNA for transcription, but transcription is from DNA to mRNA. Option D has mRNA starting translation then transcription, which is reversed.

Answer:

A. DNA → transcription → mRNA → translation → proteins produced