How much ATP a person consumes...?

[marquitosgm]

All well except for the begining.

Average metabolic waste is 2000 KCal, not 2000 Cal.

Sometimes dietists speak of calories meaning Kcal, just for briefing.

That's all.

[billyfisher100]

It does require quite a bit of energy to break the alpha 1,4 glycosidic bond of glucose and fructose. Shouldn't that be taken into account?

[JackBean]

Really? How much is it?

[billyfisher100]

Well, some glycoside hydrolase would break the bond - It would probably couple ATP hydrolysis or NADH/FADH hydrolyis and use a positive magnesium ion catalyst. I'd have to find out more info and do a Gibbs on that one. I have no idea regarding the exact energy consumption. Does anyone else?

[rafay]

I think the professor is just looking for an estimated answer along with assumptions and calculations. I don't think he is looking for a more detailed answer involving gibbs energy and bond breaking energy since he didn't go over them in class. Thanks for the help guys