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Learning objective

Explain that a sequence of three bases codes for a particular amino acid.

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Topic

Reproduction

Subtopic

DNA structure (biology only)

Aqa Gcse BiologyInheritance, variation and evolution

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Quick explanation

Explain that a sequence of three bases codes for a particular amino acid

  • This point belongs to Reproduction, especially DNA structure (biology only).
  • You need to be able to explain that a sequence of three bases codes for a particular amino acid.
  • The key ideas to know are A, T, and bases.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

ATbasesCamino acid

Why it matters

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

Quick student answer

What is a sequence of three bases codes for a particular amino acid?

Direct answer

In Biology, this page helps you answer questions about a sequence of three bases codes for a particular amino acid within Reproduction. Focus on the key process, correct scientific terms, and how the idea links to exam-style questions. Key terms to check are triplet code and amino acid.

Key terms

  • triplet code: In DNA structure (biology only), triplet code means the specific Unit 4.6 idea used to answer this objective: students must explain that a sequence of three bases codes for a particular amino acid. Keep the term curriculum-specific by applying this boundary: DNA is the molecule; a gene is a functional section of that molecule. Do not use triplet code as a vague inheritance word; link it to Reproduction and explain the exact role it plays in AQA GCSE Biology.
  • amino acid: The building blocks of proteins, each coded for by a specific sequence of three bases in DNA.

Common trap

Misunderstanding Base Sequences: Emphasize that it is the triplet of bases that codes for a specific amino acid, not each base on its own.

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