Confused about ATP

[prsndwg]

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Ok, so break down of ATP to ADP is exothermic and releases energy and can be used for other endothermic reaction right? how is ATP hydrolysis (ADP to ATP)releases energy when its endothermic?
is it because the bond is being made and so the energy is release? but why endothermic and release of energy..😕

help me out please

 

[uncbestyet]

ADP + P + energy => ATP (endergonic/endothermic)

ATP => ADP + P + energy (exergonic/exothermic)

Energy is required to produce ATP. Energy is released from a high energy phosphate bond when ATP is degraded to ADP and P.

I don't think endothermic/exothermic are the right terms here.

The second reaction is the hydrolysis of ATP and it is exothermic/exergomic.

 

[prsndwg]

ADP + P + energy => ATP (endothermic)

ATP => ADP + P + energy (exothermic)

Energy is required to produce ATP. Energy is released from a high energy phosphate bond when ATP is degraded to ADP and P.

yeah.. so does the ADP=> ATP have energy to help do cellular work?

 

[UCB05]

yeah.. so does the ADP=> ATP have energy to help do cellular work?

I think you have your terminology mixed up.

"break down of ATP to ADP" = "ATP hydrolysis" = exergonic/exothermic
"ADP => ATP" = ATP synthesis = endergonic, does not help do work. takes away energy from a system to form the bond, actually.

 

[prsndwg]

I think you have your terminology mixed up.

"break down of ATP to ADP" = "ATP hydrolysis" = exergonic/exothermic
"ADP => ATP" = ATP synthesis = endergonic, does not help do work. takes away energy from a system to form the bond, actually.

Thanks for the correction,

what about this Q?

 

[prsndwg]

:-?

 

[kkmaths90]

Thanks for the correction,

what about this Q?

isn't it B?

C : it says hydrolysis of ADP but Hydrolysis of ATP release energy NOT ADP

D. no disulfide bond in there

E. hydrolysis of ATP does not produce ATP again...so

Correct me if I am wrong.

 

[alexamasan]

Sadly the answer is A on topscore, but till this day, I still don't understand why. I like to convince myself that they screwed with the terminology on this question, but hopefully other people give their opinions too.

 

[UCB05]

Sadly the answer is A on topscore, but till this day, I still don't understand why. I like to convince myself that they screwed with the terminology on this question, but hopefully other people give their opinions too.

Yeah, i would guess that's a typo.

 

[prsndwg]

cool.. then I ll call it a typo too 😛

 

[dentrilla]

hydrolysis of atp FROM adp... lol should be 'into'