GCSE Biology (AQA)
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Inheritance, Variation and Evolution
Reproduction
The Basic Structure of DNA
1:33
DNA and the Genome
Spec
4.6.1.4
- The nucleus of a cell contains genetic material made of DNA.
- DNA is a polymer that forms a double helix structure.
- Chromosomes within the nucleus are composed of DNA.
- A diagram illustrates the DNA double helix with two strands, one blue and one orange.
- Genes are sections of DNA that code for specific sequences of amino acids.
- Each gene on a chromosome codes for different amino acid sequences.
- A single gene can code for hundreds or thousands of amino acids.
- The sequence of amino acids coded by a gene determines the specific protein it produces.
- Proteins are composed of amino acids, and their shape is determined by the amino acid sequence.
- It is important to understand how proteins are synthesized from amino acids coded by DNA and how they are digested by the enzyme protease for exams.
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