DNA methylation is a process by which methyl groups are added to the DNA molecule. Methylation can change the activity of a DNA segment without changing the sequence. When located in a gene promoter, DNA methylation typically acts to repress gene transcription.
So you have a muscle like the biceps brachii it’s origin is connected to the humerus then inserts to the radius origin didn’t move it’s static
Enzymes bind with chemical reactants called substrates
Brain injury classified as an injury of the central nervous system.
