DNA is a polymer made up of repeating monomer units.
State the three components that join together to make up a single DNA nucleotide.
The length of a DNA double helix increases by 0.34 nm0.34\text{ nm}0.34 nm for every pair of nucleotides. The total number of nucleotides in a cell of a particular species of plant is 9.0×1099.0 \times 10^99.0×109.
Calculate the total length of the DNA double helix in this plant cell. Give your answer in metres.
76 exam-style questions on AQA GCSE Biology 6.1 Reproduction, covering 6.1.1 Sexual and asexual reproduction, 6.1.2 Meiosis, 6.1.3 Advantages and disadvantages of sexual and asexual reproduction, 6.1.4 DNA and the genome, 6.1.5 DNA structure, 6.1.6 Genetic inheritance, 6.1.7 Inherited disorders, and 6.1.8 Sex determination. Each one has a worked solution and a mark scheme showing where the marks go.