Open main menu

Nucleotide

Key Stage 4

Meaning

A nucleotide is the monomer unit of DNA.

About Nucleotides

Nucleotides join together in a polymerisation reaction to form DNA.

A nucleotide is made of three components

There are 4 nucleotide bases:

The nucleotides are arranged in complementary pairs. Adenine and Thymine pair up on opposite sides of the DNA strand. The same is true for Cytosine and Guanine. When the strand is pulled into two pieces this allows the DNA to make two exact copies of itself. So if one side of the strand has the code AAAACCCTTG then the other will have the code TTTTGGGAAC.

References

AQA

Nucleotide, page 252, GCSE Chemistry; Student Book, Collins, AQA
Nucleotides, page 204, GCSE Biology; Third Edition, Oxford University Press, AQA
Nucleotides, page 246, GCSE Biology, CGP, AQA
Nucleotides, page 85, GCSE Biology; The Revision Guide, CGP, AQA
Nucleotides, pages 174-175, GCSE Chemistry; Third Edition, Oxford University Press, AQA
Nucleotides, pages 193-4, GCSE Chemistry, Hodder, AQA

References

AQA

Nucleotide, page 252, GCSE Chemistry; Student Book, Collins, AQA
Nucleotides, page 204, GCSE Biology; Third Edition, Oxford University Press, AQA
Nucleotides, page 246, GCSE Biology, CGP, AQA
Nucleotides, page 85, GCSE Biology; The Revision Guide, CGP, AQA
Nucleotides, pages 174-175, GCSE Chemistry; Third Edition, Oxford University Press, AQA
Nucleotides, pages 193-4, GCSE Chemistry, Hodder, AQA

Edexcel

Nucleotides, page 100, GCSE Chemistry; The Revision Guide, CGP, Edexcel
Nucleotides, page 185, GCSE Chemistry, Pearson, Edexcel
Nucleotides, page 27, GCSE Combined Science; The Revision Guide, CGP, Edexcel
Nucleotides, page 34, GCSE Biology; The Revision Guide, CGP, Edexcel
Nucleotides, page 90, GCSE Biology, CGP, Edexcel

OCR

Nucleotide monomers, page 91, Gateway GCSE Chemistry; The Revision Guide, CGP, OCR
Nucleotides, page 14, Gateway GCSE Combined Science; The Revision Guide, CGP, OCR
Nucleotides, page 15, Gateway GCSE Biology; The Revision Guide, CGP, OCR
Nucleotides, page 244, Gateway GCSE Chemistry, Oxford, OCR