Question

question 3 of 15
which of the following describes the initiation step of translation?
a. transfer rna delivers an amino acid to a ribosome.
b. a peptide bond forms between two amino acids.
c. a ribosome releases a polypeptide strand.
d. ribosomal rna recognizes a specific region of mrna.

Explanation:

• Option A: Transfer RNA delivering an amino acid to a ribosome occurs during the elongation step of translation, not initiation.
• Option B: Peptide bond formation between two amino acids is part of the elongation phase.
• Option C: A ribosome releasing a polypeptide strand is the termination step.
• Option D: In the initiation step of translation, ribosomal RNA (rRNA) in the ribosome recognizes a specific region (the start codon - usually AUG) of the mRNA. This helps in assembling the ribosome - mRNA - initiator tRNA complex.

Answer:

D. Ribosomal RNA recognizes a specific region of mRNA.