Question

the three-nucleotide segment of trna that binds to a three-nucleotide segment of mrna during translation is called a(n) _______.
a anticodon
b codon
c transcription
d amino acid

Explanation:

To solve this, we analyze each option:

• Option A: An anticodon is a three - nucleotide sequence on tRNA that pairs with the codon (three - nucleotide sequence) on mRNA during translation. This matches the description in the question.
• Option B: A codon is a three - nucleotide sequence on mRNA, not tRNA, so this is incorrect.
• Option C: Transcription is the process of making RNA from DNA, not related to the tRNA - mRNA binding segment, so this is incorrect.
• Option D: An amino acid is the building block of proteins, not a nucleotide segment, so this is incorrect.

Answer:

A. anticodon