[jena]

Hi,

My Question:

What is the nature of the enzyme that catalyzes the following reactions?

a. ATP + Glucose --> ADP + Glucose
Answer: hydrolase

b. CH₃-CH₂-OH---->CH₃-CHO has NAD⁺ ----. NADH+ H ⁺ as the enyme usedAnswer: oxyreductase

Are these the correct answers?

Thank You

[Yggdrasil]

a.  Are you sure you copied the reaction correctly?  I would double check it.

b.  Correct, although it should be spelled oxidoreductase.

[jena]

Sorry your right  part a is supposed to be

ATP + Glucose --> ADP + Glucose-6-P

Is this correct

Thanks

[Yggdrasil]

That is not a hydrolase reaction.  A phosphate group from ATP is being transfered to glucose, hence the enzyme is a transferase.  In fact, enzymes which transfer phosphates to and from ADP/ATP are of a special subclass called kinases, which play very important roles within metabolism and signaling.  Although the phosphoester bond of ATP is hydrolyzed in the reaction, its hydrolysis is coupled to the formation of a phosphoester bond with glucose, so it is a transferase and not a hydrolase (usually a hydrolase will have one reactant and two products).