Question

Based on your understanding of activation energy (EA), is the EA for ATP hydrolysis relatively low or high? Explain your reasoning.

a) Low, because ATP hydrolysis releases energy.
b) Low, because ATP hydrolysis requires less energy input.
c) High, because ATP hydrolysis is an endergonic reaction.
d) High, because ATP hydrolysis is an exergonic reaction.

Answer 1

The activation energy (EA) for ATP hydrolysis is relatively low because it requires less energy input. ATP hydrolysis is an exergonic reaction that releases a large amount of energy. Option b

Step-by-step explanation:

The correct option is b. Low, because ATP hydrolysis requires less energy input.

ATP hydrolysis is an exergonic reaction, which means it releases energy. The activation energy (EA) for a reaction is the energy input required to initiate the reaction. In the case of ATP hydrolysis, the EA is relatively low because the reaction releases a large amount of energy.

ATP is called a high-energy intermediate because its hydrolysis releases a large amount of free energy, which can be used to power cellular work. The hydrolysis of ATP into ADP and inorganic phosphate releases approximately 7.3 kcal of free energy per mole of ATP. This energy can be harnessed to perform various cellular functions such as muscle contraction, nerve transmission, and polymer synthesis. Option b