Is this supposed to be multiple choice?
The three I know of is unsaturated, monounsaturated, and poll polyunsaturated.
There's a trans one too, but it's not natural.
ATP
Carbon and Hydrogen
The speed up the rate of the reaction
During exercise when the need for energy is high
Cellular respiration? (Not sure)
DNA in the bacteria cell is always.......
Proteins is what comes in and out of the cell
Enzymes are proteins that speed up chemical reactions without being used up.