Multiple Choice
Which ribosomal site of protein synthesis does the initiator tRNA bind to initiation translation?
5. DNA to RNA to Protein
Translation
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During translation, the ribosome assembles at which specific site on the mRNA?
A
The 5' poly-A tail
B
The stop codon (UAA, UAG, or UGA)
C
The 3' untranslated region (UTR)
D
The start codon (AUG)
Verified step by step guidance1
Understand the process of translation: Translation is the process by which ribosomes synthesize proteins using mRNA as a template. It involves initiation, elongation, and termination phases.
Identify the role of the ribosome: During initiation, the ribosome must locate the correct starting point on the mRNA to begin translating the genetic code into a protein.
Recognize the importance of the start codon: The start codon (AUG) is the specific sequence on the mRNA where translation begins. It codes for the amino acid methionine, which is the first amino acid in most proteins.
Eliminate incorrect options: The 5' poly-A tail is not involved in translation initiation but in mRNA stability. The stop codons (UAA, UAG, UGA) signal the end of translation, not the start. The 3' untranslated region (UTR) is a non-coding region that follows the stop codon and does not play a role in initiation.
Conclude that the ribosome assembles at the start codon (AUG) on the mRNA to initiate translation.
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