alleryOn a tRNA molecule, the sequence that is complementary to the codon on mRNA is called the:
AOperon
BPromoter
CAnticodon
DReplicon
Answer & Solution
Correct answer: C. Anticodon
1. During translation, tRNA delivers amino acids in the order set by the mRNA codons.
2. For each codon, the matching tRNA must carry a complementary sequence.
3. This complementary sequence on tRNA is called the anticodon.
4. So the correct answer is anticodon.
5. Trap (operon): an operon is a cluster of genes in DNA, not a tRNA sequence, so it is wrong.
6. Trap (promoter): a promoter is a DNA region where transcription begins, not part of tRNA.
7. Trap (replicon): a replicon is a unit of DNA replication, unrelated to tRNA pairing.
8. Hence only anticodon fits the complementary codon-pairing role on tRNA.
_Source: Balbharati (Maharashtra Board) Class 10 Science & Technology Part 2, Ch 1 "Heredity and Evolution", p.11_
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