Id say its the last option. Though im not 100% sure
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.......
The answer to this question is B
Function of an enzyme is to lower reaction's activation energy and to increase speed of a reaction, but to make it happen, enzyme and substrate must fit spatially. The shape of an enzyme is essential to make enzyme-substrate complex - if active site of an enzyme doesn't fit to substrate, there won't be a enzyme-catalised reaction.
