Biology crossword Organisation

Adapted for a particular reason
A group of cells that have a similar structure and function
A group of tissues gathered together to perform a particular function
A substance that increases the rate of a chemical reaction without being changed or used itself
The conditions at which an enzyme works best
When the shape of an enzyme is changed (by excessive temperature or pH) so that it no longer functions
An enzyme used to break down proteins into amino acids
An enzyme that breaks down fat into fatty acids and glycerol
An enzyme that can break down a carbohydrate
An enzyme that breaks down starch
A fluid, produced by the liver and stored in the gall bladder that emulsifies fat