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Learning objective

Describe DNA as a polymer made from repeating nucleotide units.

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Topic

Reproduction

Subtopic

DNA structure (biology only)

Aqa Gcse BiologyInheritance, variation and evolution

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Quick explanation

Describe DNA as a polymer made from repeating nucleotide units

  • This point belongs to Reproduction, especially DNA structure (biology only).
  • You need to be able to describe DNA as a polymer made from repeating nucleotide units.
  • The key ideas to know are A, nucleotide, and T.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

AnucleotideTCG

Why it matters

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

Quick student answer

How does dNA work?

Direct answer

In Biology, this page helps you answer questions about dNA within Reproduction. Focus on the key process, correct scientific terms, and how the idea links to exam-style questions. Key terms to check are nucleotide and polymer.

Key terms

  • nucleotide: The basic building block of DNA, consisting of a sugar, a phosphate group, and one of four bases (adenine, cytosine, guanine, or thymine).
  • polymer: A large molecule composed of repeating structural units, in this case, nucleotides that form the DNA strand.

Common trap

Confusing DNA Structure: Emphasize that DNA is a polymer composed of two strands that twist to form a double helix, and ensure they understand the significance of the nucleotide units.

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