Learning objective

Explain (HT only) how DNA structure affects the protein made by controlling the amino acid sequence.

Read the explanation, check the common trap, then practise with flashcards and questions.

At a glance

5

Flashcards

7

Questions

Topic

Reproduction

Subtopic

DNA structure (biology only)

AQA GCSE BiologyInheritance, variation and evolution

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Short explanation

Explain (HT only) how DNA structure affects the protein made by controlling the amino acid sequence.. Within Reproduction, this learning objective sits inside DNA structure (biology only) for AQA Biology 8461. Focus on using ideas such as A, amino acid, C, DNA structure accurately in your explanation. A strong response should define the core idea, describe the relevant biological process, and connect it back to the question wording instead of giving a vague definition. When revising, students should aim to explain the science clearly, include precise biological vocabulary, and show how the process or structure links to the wider topic rather than listing isolated facts.

Key concepts

DNA structureAmino acid sequence

Why it matters

This objective helps connect DNA structure (biology only) to exam-style questions, flashcards, and revision notes for Reproduction.

Common mistakes

1 linked
  • Misunderstanding Base Pairing Rules: Explain that only complementary bases pair (A with T, C with G) and that the DNA sequence is read in triplets (codons) on the mRNA, each codon specifying a particular amino acid. Emphasise that the sequence of codons, not the individual bases alone, determines the protein sequence.

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