IB Biology HL D1.2.7 Complementary Base Pairing Questions

Explore how complementary anticodons recognize mRNA codons and how enzyme-specific tRNA charging protects translation accuracy in IB Biology HL D1.2.7.

Exam points

Explain that tRNA anticodons pair with complementary mRNA codons by hydrogen bonding during translation.
Deduce codons or anticodons from DNA/mRNA sequence representations while preserving the correct complementary bases and direction.
Explain how aminoacyl-tRNA synthetases attach a specific amino acid to each tRNA, supporting accurate amino-acid addition.

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Study D1.2.7—Complementary base pairing conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

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The structure of a transfer RNA (tRNA) molecule is shown in the diagram. The attached amino acid, which is aspartic acid, is indicated by the arrow.

Figure for Question IB Biology HL D1.2.7 Complementary Base Pairing Questions question 1 — IB Biology HL

Explain how living organisms ensure that the amino acid linked to this tRNA molecule is always aspartic acid.

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IB Biology HL D1.2.7 Complementary Base Pairing Questions question 1