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GCSE Biology · key term
A repeating unit of DNA containing a sugar, a phosphate group and one base.
Used by AQA, Edexcel and OCR
Specification 4.6.1.5 · Paper 2
Revise: DNA Structure and the Genetic CodeIn DNA, each unit is a nucleotide. Every nucleotide has the same kind of sugar and a phosphate group, but its attached base can be one of four types: A, C, G or T. These letters name the bases, not four different sugars.
Specification 3.4 · Paper 1
A subunit of DNA consisting of a sugar, a phosphate group and one of four bases.
Revise: DNA StructureThe subunits of DNA are called nucleotides.
Specification B1.2c, B1.2e · Paper 1 (Foundation), Paper 3 (Higher)
A subunit of DNA containing a sugar, a phosphate group and one base.
Revise: NucleotidesDNA carries genetic information in cells. It is a polymer: a long molecule built from smaller units joined together. Those units are called nucleotides.
A repeating unit of DNA made of a sugar, a phosphate group and one base.
Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
A subunit from which a DNA strand is built.
Revise: DNA StructureDNA is a very large molecule, but it is assembled from many smaller subunits called nucleotides. Individual nucleotides join together in a long chain. A small unit used to build a polymer is called a monomer, so nucleotides are the monomers of DNA.
A repeating unit of DNA consisting of a sugar, a phosphate group and one base attached to the sugar.
A DNA building block that contains a sugar, a phosphate group and one base.
Do not confuse a nucleotide with a base: a nucleotide contains a sugar, a phosphate group and a base.
When describing a nucleotide, name all three parts: a sugar, a phosphate group and one of four bases.
Distinguish carefully between a nucleotide, which is one subunit, and DNA, which is a polymer containing many nucleotides.
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