ATP QUESTION ON FINAL

[Fdonovan 3D]

Can someone explain to me the ATP hydrolysis question from the final? I’m not sure how the value of Q was supposed to be determined I just felt like I wasn’t picking up on some given information.

[ayushibanerjee06]

it said that all inorganic phosphate came from ADP so you can use the stoichiometry to find how much Pi you have. you can calculate Q from there

[Charysa Santos 4G]

it said that all inorganic phosphate came from ADP so you can use the stoichiometry to find how much Pi you have. you can calculate Q from there

I believe that the question stated that the phosphate actually came from ATP, not ADP

[Michael Du 1E]

it said that all inorganic phosphate came from ATP so I assumed that the phosphate, as a result, had the same concentration as ATP which was 4 x 10^3 or something I believe. As a result, my reaction quotient equation was: ((ADP)(P)/(ATP) / (9 x 10^-6)(4 x 10^-3)/ (4 x 10^-3). However, I am not sure if I did the problem correctly as I heard some people got different answers.

However, I do believe that the statement of how all inorganic phosphate came from ATP was important in order to solve the problem

[Eugene Chung 3F]

Sine it says pi comes from ATP, the two concentrations cancels and K depends on [ADP] only.

[Prasanna Padmanabham 4I]

Sine it says pi comes from ATP, the two concentrations cancels and K depends on [ADP] only.

Maybe I am wrong about how I interpreted this problem, but I assumed that since all the Pi came from ATP, I assumed it meant that it only came from ATP that was broken into ADP...so Pi = ADP concentration...

I'm worried now, but I guess "it is what it is"...

[Joseph Saba]

Sine it says pi comes from ATP, the two concentrations cancels and K depends on [ADP] only.

Maybe I am wrong about how I interpreted this problem, but I assumed that since all the Pi came from ATP, I assumed it meant that it only came from ATP that was broken into ADP...so Pi = ADP concentration...

I'm worried now, but I guess "it is what it is"...

I did the same as you, ATP and Pi cancel out according to my understanding of the quesiton

[ayushibanerjee06]

sorry I meant ATP and not ADP. yeah I did everything that everyone else mentioned above.

[Ayushi2011]

K depended on ADP, basically the same as ADP.

[Owen-Koetters-4I]

K solely depended on ADP