Topscore conflicts with destroyer..help

[BiomajorPreDent]

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On test 3 question 2 (i believe) topscore says hydrolysis of ATP is endergonic

destroyer bio question 336 says hydrolysis of ATP is exergonic...

wtf mate?

I have the DAT tommorow I can not deal with a conflict right now!!! ahhh!

 

[iwannabadentist]

i believe hydrolysis of ATP is exergonic because cleaving a high energy phosphate bond releases energy that is used to drive biosynthetic processes. The main function of ATP in the cell is to act as the energy supplier, so it should be intuitive that hydrolysis of ATP releases energy. I don't know why TopScore would say otherwise.

 

[PooyaH]

ATP hydroysis is def. exergonic!!!

 

[BiomajorPreDent]

Ya I know..heres the exact question, maybe they mis-worded it

"The hydrolysis of ATP from ADP and inorganic phosphate:"

the explanation:

"ATP is a renewable source of energy to drive cellular work that can be regenerated by the addition of a phosphate to ADP. The regeneration of ATP from ADP is an endergonic process."


😕

 

[PooyaH]

Oh here it's referring to the opposite action! It's saying making ATP from phosphate and ADP is endergonic which is true!

 

[BiomajorPreDent]

ya...but its saying hydrolysis...which refers to the breakdown of it..

shouldnt the correct term topscore should have used been "phosphorylation" ?

Im looking at it in my campbells text its a tiny two paragraph section of page 150 in the 7th edition..

It says ATP synthesis from ADP + Pi requires energy

but ATP HYDROLYSIS to ADP + Pi yields energy

So that word hydrolysis shouldnt have been used..right?

 

[PooyaH]

Yeah the wording of this question is messed up. Not to mention it says, "hydrolysis FROM" but still is wrong. Hydrolysis refers to breaking down certain polymers and not forming them (except hydration)

 

[BiomajorPreDent]

OMG LOL

Do you want to know something even funnier..actually its sad because I am now questioning the accuracy of this damn program..

I sent an email to topscore...and I noticed this question was already edited...

2. Test 3, Bio, Question 2
Question stem changed from "formation" to "hydrolysis"

http://www.scholarware.com/DATFix07.x.htm



So they had it correct the first time and they changed it!!! 😱

 

[PooyaH]

haha they must've been on something! lol

 

[nze82]

ATP Hydrolysis is without a doubt Exorganic! ATP get's converted to ADP, when the last high energy phosphate bond is cleaved. This results in release of energy (exorganic reaction), which can then be used to derive other metabolic processes in the body.

 

[tdkyun]

i believe hydrolysis of ATP is exergonic because cleaving a high energy phosphate bond releases energy that is used to drive biosynthetic processes. The main function of ATP in the cell is to act as the energy supplier, so it should be intuitive that hydrolysis of ATP releases energy. I don't know why TopScore would say otherwise.

Breaking a bond requires energy, making a bond releases energy. So it is incorrect to say 'cleaving a high energy phosphate bond releases energy'. The extra energy actually comes from the reaction of hydrolysis.

 

[nze82]

Breaking a bond requires energy, making a bond releases energy. So it is incorrect to say 'cleaving a high energy phosphate bond releases energy'. The extra energy actually comes from the reaction of hydrolysis.

Hmmm...Perhaps he/she is referring to the net energy change!