BRAINCAKEComparing DNA
DNA sequencing can now be done by machines so base sequences can be compared to establish relationships between species.
The Sanger method is used to sequence DNA fragments.
Modified nucleotides which can attach to a base but are terminators are used.
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Key terms in this lesson
- nucleotide
- A molecule made of a pentose sugar, a phosphate group and a nitrogen-containing base.
- DNA polymerase
- The enzyme that joins free nucleotides together to form a new complementary strand of DNA.
- species
- A group of organisms with similar characteristics that can interbreed to produce fertile offspring.
More in Biodiversity
- The Impact of Agriculture
- Balancing Conservation and Farming
- Managing Ecosystems
- Investigating Diversity
- Comparing mRNA
- Comparing Amino-acids Sequences
- Sampling
- Random Sampling
All 33 lessons in Biodiversity · All AQA AS-level Biology topics