[BIO]question

[299678]

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The phosphorylation of ADP to form ATP requires energy. What happens to most of this energy?
a) It is lost as heat to the surroundings
b) IT is converted into electrical energy
c) It is stored as a chemical bond energy
d) It is destroyed during the course of the reaction

Need your brief reasoning to support your answer !

 

[amcmahon]

Its either A or C, but I'm going to go with A because most processes are not very efficient so I would expect the majority of the transfered energy to be lost as heat.

 

[UCB05]

The phosphorylation of ADP to form ATP requires energy. What happens to most of this energy?
a) It is lost as heat to the surroundings
b) IT is converted into electrical energy
c) It is stored as a chemical bond energy
d) It is destroyed during the course of the reaction

Need your brief reasoning to support your answer !

The diphosphate bond formed from ADP > ATP is kinetically stable, but thermodynamically unstable. While the bond is strong, there is a lot of electronic repulsion between the two electron-rich phosphate groups. This makes it a great energy storage molecule, because it has a lot of energy packed into it, but it won't go around spontaneously dephosphorylating itself. Cells preserve whatever energy is in question by coupling it to the formation of this high-energy phosphate bond, storing it as chemical bond energy.

 

[nyr201]

The phosphorylation of ADP to form ATP requires energy. What happens to most of this energy?
a) It is lost as heat to the surroundings
b) IT is converted into electrical energy
c) It is stored as a chemical bond energy
d) It is destroyed during the course of the reaction

Need your brief reasoning to support your answer !

dude do ur own homework i really think this is for ur bio class or something...especially since u wont say where these questions are from...and why do u say u need brief reasoning and explanation everytime???

im down to help but its non stop flooding w the same thread title

 

[299678]

NYR 201

calm down NYR 201

I have already indicated it came from GRE BIO on other posts (may be u missed it)
Be mature !

I posted it to share good question with SDN members, not for my home work 🙂 Reason why I need a brief reasoning is to understand the question on different perspectives. There is only answer, no explanation at all on problem book.

Correct answer is c

+1 UCBO5 thanks for your input

 

[yappy]

Bad question b/c of A vs C. It requires you to know weather or not more energy is stored vs lost. In many cases, as mentioned above, alot of heat is lost to surroundings during chemical reactions. This is expressed by our body temperatures which is key for proper enzyme function.
Though most important energy is stored in the phophoanhydride bonds of ATP. Therefore I would guess C is correct too - still not knowing which is greater... thermal vs chemical.

 

[299678]

yeah Yappy I agree with you, but this is the DAT like question, trust me, so don't fight with it.

The main confusing part of the question is

when bond form - release energy
when bond break - absorb energy

but this may confuse us whenever dealing with ATP since we learned break down ATP to ADP + Pi always release energy. This is because its not single reaction, but there are multiple processes involved in the ADP formation from ATP, so net results is energy producing.

so when ATP -ADP, NET energy is absorbed in to chemical bonds, so answer is c I guess

I learned this after I posted the question.