Biology Question

[dental13]

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It says..
Oxidation of molecuels is essential for releasing energy in a form that can be used by cells. All cellular oxidation have in common the

1. addition of oxygen
2. removal of water
3. removal of carbon dioxide
4. removbal of electrons
5. removal of hydrogens

The answer is (5), first, I thought to my self, okay, this is glycolysis process --> need oxygen and its gonna form water and carbon dioxide at the end of the process.

So I got confused between choice 1,2, and 3... After looking at the answer choice I realized this is more like a organic question where oxidation is always removal of hydrogens..

Anyone would have gotten this right if this was actual DAT question?

 

[KentUT]

I think this is referring to the creation of ATP specifically during oxidative phosphorylation or the electron transport chain. This question is a bit ambiguous because there are three characteristics of oxidation : 1. Loss of electrons 2. Removal of H 3 adding oxygen.

However, energy that is usable in cells gives away that it is specifically talking about redox reactions in the electron transport chain.. The removal of hydrogens creates the concentration gradient that drives ATP synthatase- thus removal of hydrogen creates the usable form of energy (ATP).

I could be wrong but this was the only way I could make sense of that answer.