Energy Calculated

Discussion of all aspects of cellular structure, physiology and communication.

Moderators: honeev, Leonid, amiradm, BioTeam

Post Reply
Posts: 15
Joined: Mon Mar 02, 2009 12:04 am

Energy Calculated

Post by seders99 » Fri Mar 20, 2009 3:31 pm

Heres the question:

Approximately what % of the energy of glucose is transferred to storage in ATP as a result of the complete oxidation of glucose to CO2 and water in cellular respiration?

I know oxidation means the loss of electrons. The offered answers are:
none of the amount

I am not looking for the answer, just interested in how this is calculated for further references. Where do I begin to understand this. THANKS

User avatar
Inland Taipan
Inland Taipan
Posts: 6832
Joined: Thu Mar 03, 2005 10:18 pm
Location: Romania(small and unimportant country)

Post by MrMistery » Fri Mar 20, 2009 11:47 pm

the hydrolysis of one mole of ATP yields 7.3 kcal. The hydrolysis of one mole of glucose yields 686 kcal. If you know enough about cell respiration you know how many moles of ATP are produced from each mole of glucose. Then you can just multiply that and see how much of the energy in the glucose is still there in ATP.

PS: for the future, it is a value that is useful to memorize
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter

User avatar
Posts: 131
Joined: Tue Jun 10, 2008 12:21 pm
Location: Western Australia

Re: Energy Calculated

Post by futurezoologist » Sat Mar 21, 2009 12:28 pm

36 ADP+P molecules bonded from one glucose in cellular respiration(sometimes 38).
+ MrMistery's numbers and you got yourself an answer.
A wise man once said to me:
"Build a man a fire, and he'll be warm for a day. Set a man on fire, and he'll be warm for the rest of his life."

Only the fittest chickens cross the road.

Post Reply

Who is online

Users browsing this forum: GregoryAnoni and 9 guests