Nucleotide
Biology: AQA GCSE Higher, topic 6.1.10
DNA
DNA is a polymer consisting of two long strands of small units that repeat throughout the structure, called nucleotides. Each of these is made up of a sugar, a phosphate and a base attached to the sugar.
DNA
DNA
Test yourself on Nucleotide
Why is DNA classified as a polymer?
Why does a whole DNA molecule contain far more atoms than a single nucleotide?
Each nucleotide in DNA contains one sugar, one phosphate and one base joined together. What does this tell you about the amounts of these three parts in a whole DNA molecule made of many repeating nucleotides?
DNA nucleotides contain a base that can take one of four forms, along with a sugar and a phosphate. What is most likely to differ between two neighbouring nucleotides in the same DNA strand?