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

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Reproduction

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DNA structure (biology only)

Aqa Gcse BiologyInheritance, variation and evolution

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Quick explanation

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

  • This point belongs to Reproduction, especially DNA structure (biology only).
  • You need to be able to explain (HT only) how DNA structure affects the protein made by controlling the amino acid sequence.
  • The key ideas to know are T, G, and DNA structure.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

TGDNA structureHT onlyCA

Why it matters

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

Quick student answer

Why does (HT only) how DNA structure affects the protein made by controlling the amino acid sequence?

Direct answer

In Biology, this page helps you answer questions about (HT only) how DNA structure affects the protein made by controlling the amino acid sequence within Reproduction. Focus on the key process, correct scientific terms, and how the idea links to exam-style questions. Key terms to check are DNA structure and Amino acid sequence.

Key terms

  • DNA structure: The arrangement of nucleotides in a double‑helical polymer, where complementary bases (A with T, C with G) pair to form a stable sequence that determines the order of amino acids in a protein.
  • Amino acid sequence: The linear order of amino acids encoded by a gene’s DNA sequence, which dictates the protein’s shape and function.

Common trap

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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