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gen8 12-14-2008 10:44 PM

Enzyme and ATP help
Hello everyone,
I'm new to this forum. I am currently taking biology correspondence and am having troubles with a couple questions.

Lacatse hydrolyzes lactose into glucose and galactose. Galactose is then converted to another glucose by galactosidase. Outline the reaction involving these enzymes using a word equation.

I initially thought:
LactASE + H2o -> glucose and fructose

and had no clue for the second part.

Then I looked on the net and found these 2 equations:

Lactose + H2O ----------> galactose + glucose

Galactose oxidase
Galactose + O2 --------------> galactohexodialdose + H2O2

Are these 2 equations about something totally different?

Also, I am not sure about this question:
How does the structure of ATP make it an effective energy carrier? Where does the energy stored in the molecules come from and how is it released?

The biology course is for the last year in highschool, so please bare with me and not make explanations to complicated.

Your help is greatly appreciated.

j_thomas 01-03-2009 07:16 AM

Re: Enzyme and ATP help
For undertsanding ATP,u shld abt [Only registered and activated users can see links. Click Here To Register...].

An ATP synthase (EC is a general term for an enzyme that can synthesize adenosine triphosphate (ATP) from adenosine diphosphate (ADP) and inorganic phosphate by utilizing some form of energy.

The overall reaction sequence is:
ADP + Pi → ATP

Molecular model of ATP synthase by X-ray diffraction method

ATP synthase in E. coli

These enzymes are of crucial importance in almost all organisms, because ATP is the common "energy currency" of cells.

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