potential energy

Discussion of all aspects of biological molecules, biochemical processes and laboratory procedures in the field.

Moderators: honeev, Leonid, amiradm, BioTeam

samie
Garter
Garter
Posts: 4
Joined: Tue Oct 18, 2005 4:49 am

potential energy

Post by samie » Tue Oct 18, 2005 4:58 am

Which one has higher chemical potential energy- ATP, glucose, or glycogen?

User avatar
Poison
Inland Taipan
Inland Taipan
Posts: 2322
Joined: Sun Jan 02, 2005 12:44 pm
Location: Turkey

Post by Poison » Tue Oct 18, 2005 10:27 am

If you are asking the highest energy they contain amon those 3: It is ATP. But on the other hand, If you even think only about glycolysis , you use 2 ATP and get 4 ATP back. (have 2 ATP in the end) If we involve other reactions too you get 36-38 ATP as total. You can use this logic for glycogen too.
But at first sight, if I understood correctly, Iwould say ATP.
It matters not how strait the gate
How charged with punishment the scroll
I am the Master of my fate
I am the Captain of my soul.

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

Post by MrMistery » Tue Oct 18, 2005 5:58 pm

On an exam question, i would answer glycogen. Since teachers aren't usually as smart as needed to make such a logical argument as Poison did above :lol: :lol:
"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

samie
Garter
Garter
Posts: 4
Joined: Tue Oct 18, 2005 4:49 am

Post by samie » Tue Oct 18, 2005 9:13 pm

Thanks for replying
I'm really confused with this questions since glycogen and glucose can produce more ATP. But then I think that ATP has more energy :?: ... :x

2810712
King Cobra
King Cobra
Posts: 697
Joined: Thu Jan 20, 2005 12:19 pm

Post by 2810712 » Wed Oct 19, 2005 6:39 am

Probably , u all are thinking of internal energy of those molecules [rotational, vibrational energy etc.]
ATP has directly 'usable'[biologically] potential energy doesn't mean it has highest energy,
Also, if glycogen or glucose don't have thatmuch P.E. then from where does it come ??? We can say that they don't have directly 'uasable '
energy. It is their expected property as they help storage and transport of energy, without its ''loss''.
I'm curious about ur vievs...

hrushikesh

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

Post by MrMistery » Wed Oct 19, 2005 5:42 pm

Absolutely right. In my opinion, glycogen has the most energy since it will produce something like 2000 molecules ATP from one glycogen molecule. But it is stored energy, you need 5 enzymes, phosphates+Krebs cycle enzymes+ FoF1 ATP-synthetase to get to it(hope i counted right :D )
"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
Poison
Inland Taipan
Inland Taipan
Posts: 2322
Joined: Sun Jan 02, 2005 12:44 pm
Location: Turkey

Post by Poison » Wed Oct 19, 2005 6:18 pm

In an exam answer: ATP. Because especially high school teachers usually don't like logical thinking, and deciding on your own. It sounds stupid. But that is the case. I always argued with my teachers at the high school, because they gave wrong info. Anyway, I just wasted time. :)
It matters not how strait the gate
How charged with punishment the scroll
I am the Master of my fate
I am the Captain of my soul.

User avatar
victor
King Cobra
King Cobra
Posts: 2668
Joined: Sat Apr 30, 2005 12:01 pm
Location: Yogyakarta, Indonesia..
Contact:

Post by victor » Fri Oct 21, 2005 11:39 am

Let me give this:
In vitro way:
ATP ----> ADP + Pi Enthalpy change = 7.33 kkal/mole
Glucose + 6O2 ----> 6CO2 + 6H2O Enthalpy change = 686 kkal/mole

In vivo way: [just only for ATP]
ATP ----> ADP + Pi Enthalpy exchange = 13.33 kkal/mole

From this side, we can see the enthalpy energy resembles the potential energy of those 2 molecules.. :D
Hope this helps..and for Biology, even though it's less in math, be logic is also important.
Q: Why are chemists great for solving problems?
A: They have all the solutions.

User avatar
mith
Inland Taipan
Inland Taipan
Posts: 5345
Joined: Thu Jan 20, 2005 8:14 pm
Location: Nashville, TN
Contact:

Post by mith » Fri Oct 21, 2005 1:17 pm

I'd say glycogen simply because it says potential energy. If it says ready to go activated compound, i'd go with atp.
Living one day at a time;
Enjoying one moment at a time;
Accepting hardships as the pathway to peace;
~Niebuhr

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

Post by MrMistery » Fri Oct 21, 2005 5:44 pm

Same with Dave.
@Ozge
I argue with my teacher all the time, and she is really cute when trying to prove her wrong opinions :D Anyway i like it that she always admits it when i am right. And i am always right :D
"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
Poison
Inland Taipan
Inland Taipan
Posts: 2322
Joined: Sun Jan 02, 2005 12:44 pm
Location: Turkey

Post by Poison » Fri Oct 21, 2005 7:46 pm

My high school teachers never- yes never- said I'm right. Because they thought they know more than I do. I brought them many books (really advanced books) to prove I'm right but they still had doubt. Anyway, they were wrong. And I just wasted time. :)

*back to topic*
Ok maybe the term "potential energy" can make it able to argue. Then: glycogen. :)
It matters not how strait the gate
How charged with punishment the scroll
I am the Master of my fate
I am the Captain of my soul.

Fried Zygote Sandwich
Death Adder
Death Adder
Posts: 58
Joined: Wed Sep 28, 2005 4:50 am

Post by Fried Zygote Sandwich » Sun Oct 23, 2005 2:19 am

Yeah, it's all to do with potential energy. Definately glycogen, as far as I'm concerned.

Potential energy is the energy stored in the chemical bonds that CAN be used in a chemical reaction. Doesn't matter if it needs enzymes to activate it, it's got potential energy.

Second reasoning, as I'm sure has already been pointed out, is glycogen is a glucose polymer (8 or 12 glucose I believe). So therefore it must obviously have more stored energy than glucose. So I'm 98.6% sure it's glycogen. This question is a reasoning question, not an exact values question. If glucose produces more than one ATP and glycogen is more than one glucose then the obvious choice is glycogen.

Post Reply

Who is online

Users browsing this forum: No registered users and 8 guests