Biology A-Level
increased DNA methylation
What increased DNA methylation means in Biology A-Level, as defined for AQA.
Definition of increased DNA methylation
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Reference: AQA
Methyl groups attach to cytosine bases in the promoter region, so transcription factors can no longer bind there and the DNA coils more tightly, so the gene is not transcribed.
Topics that use increased DNA methylation
Related terms
- complementary base pairing
- correlation not causation
- decreased histone acetylation
- DNA methylation
- environment and gene expression
- genotype versus environment
- histone acetylation
- hypermethylation of tumour suppressor genes
Using increased DNA methylation in the exam
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