What does a dehydrogenase enzyme do?
a. creates a new bond by removing a carbon
b. inserts a water molecule into a bond to cut it
c. moves a chemical group to another site in the same molecule
d. oxidizes a substrate by removing a hydrogen molecule
e. uses atp to phosphorylate a substrate

d. oxidizes a substrate by removing a hydrogen molecule.

Explanation:

The dehydrogenase is the enzyme which is responsible for oxidizing the substrate by removing the hydrogen molecule and transfers the hydrogen molecule to the proton acceptor that can be either the NAD/NADP or a flavin enzyme. This enzyme is used in the cytochrome system during the process of respiration that is required for the net production of the ATP molecules.      

the answer is b. glad to .

i wish i could with all of them i can barley see the first one so here's the answer to the first one b