Question

the diagram shows steps that occur during translation. which description identifies and explains the role of one of the molecules labeled in the diagram? a x represents the peptide chain that is being built based on the mrna strand. b y represents mrna which is the genetic information that codes for protein synthesis in the cytoplasm. c y represents trna that delivers amino acids to the ribosome so that they can be added to the developing peptide. d x represents dna that scans the developing peptide to make sure that the sequence of the amino acids matches the...

Explanation:

• Option A: In translation, the peptide chain is built, but X in the diagram is mRNA (the template), not the peptide chain. So A is incorrect.
• Option B: Y is not mRNA. mRNA is the template (X here), and Y is tRNA. So B is incorrect.
• Option C: tRNA (Y) carries amino acids to the ribosome, where they are added to the growing peptide chain during translation. This matches the role of tRNA.
• Option D: Translation occurs in the cytoplasm, and DNA is not involved in the translation process (DNA is transcribed to mRNA, which is then translated). Also, X is mRNA, not DNA. So D is incorrect.

Answer:

C. Y represents tRNA that delivers amino acids to the ribosome so that they can be added to the developing peptide.