Inheritance & EvolutionDiagram

Explore: DNA Structure

Part of DNA Genome · GCSE GCSE Biology revision

This diagram covers Explore: DNA Structure within DNA Genome for GCSE Biology. DNA structure, function, and the human genome It is section 4 of 15 in this topic. Focus on the labels, the relationships between parts, and the explanation that turns the diagram into an exam-ready answer.

Topic position

Section 4 of 15

Practice

25 questions

Recall

25 flashcards

🧬 Explore: DNA Structure

Tap each dot to reveal the structure and what it does — close-ups for the key parts.

Remember: DNA = Double helix of nucleotides | A pairs with T, C pairs with G | Gene = section of DNA coding for a protein

Keep building this topic

Read this section alongside the surrounding pages in DNA Genome. That gives you the full topic sequence instead of a single isolated revision point.

Why Study the Genome?Explore: How DNA Copies Itself The Blueprint of Life Structure of DNA

Practice Questions for DNA Genome

Which of the following base pairing rules is correct for DNA?

A. A-T and C-G
B. A-C and T-G
C. G-A and C-T
D. T-C and G-A

2 marksfoundation

What are the four nitrogenous bases found in DNA?

4 markshigher

Quick Recall Flashcards

What is an allele?

A different version of the same gene. For example, the gene for eye colour has alleles for brown eyes and blue eyes. Alleles arise due to mutations in the original gene.

What is a gene?

A section of DNA that codes for the production of a specific protein. The sequence of bases in the gene determines which protein is made.

25 questions on DNA Genome — practise free

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Why Study the Genome?

Explore: How DNA Copies Itself