Question

Why is ATP not worth the same amount in different cell types (i.e. have a different ΔG) in multicellular organisms?

1. Electrostatic repulsion between phosphate groups within a molecule of ATP.
2. Different concentrations of ATP present.
3. Different concentrations of ADP and P_i.
4. Not all cells in a given organism are capable of oxidative phosphorylation.

Why is ATP not worth the same amount in different cell types (i.e. have a different ΔG) in multicellular organisms?

1. Electrostatic repulsion between phosphate groups within a molecule of ATP.
2. Different concentrations of ATP present.
3. Different concentrations of ADP and P_i.
4. Not all cells in a given organism are capable of oxidative phosphorylation.

Answer 1

Answer

Electrostatic repulsion between phosphate groups within a molecule of ATP.

Explanation:

ATP is nitrogenous base adenine, as 5 carbon sugar (rubose) and 3 phosphate groups. When ATP hydrolyse and form ADP. This hydrolysis need Delta G of -30.5 KJ/mol for one molecule of ATP.

{Note : In living cell delta G is -57KJ/mol}

In cells the exergonic reaction of ATP hydrolysis takes place along with endergonic reaction such as cellular process. Some of the individual reaction is equal to the delta G.

The delta G associated with ATP hydrolysis due to the repulsion of phosphate groups in ATP molecules.

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