AQA GCSE Biology · 8461
Specification 4.2.2.1, 4.4.2.3, 4.7.4.1, 4.8 · Paper 1, Paper 2
A protein that speeds up a particular chemical reaction without being used up.
Revise: The Human Digestive System and EnzymesThe small intestine receives digestive enzymes from the pancreas and contains enzymes of its own. Digested, soluble molecules are absorbed here into the bloodstream. The large intestine absorbs water from undigested material; the remaining faeces pass through the rectum and leave through the anus.
- Revise: The Mechanism and Factors of Enzyme Action
A protein that acts as a biological catalyst, increasing the rate of a reaction without being used up.
- Revise: Metabolism
A biological catalyst that speeds up a chemical reaction without being used up.