Question

1. when the terminal phosphate bond is broken, a molecule of inorganic phosphate $p_{i}$ is formed, and energy is __________. a. for this reaction: atp → adp + $p_{i}$, $delta g$ = ________ b. is this reaction endergonic or exergonic? __________ 17. in many cellular reactions, a phosphate group is transferred from atp to some other molecule in order to make the second molecule less stable. what term is now used to describe the second molecule?

Explanation:

Step1: Recall ATP - ADP reaction

When the terminal phosphate bond of ATP is broken, energy is released.

Step2: Determine $\Delta G$ value

The reaction $ATP
ightarrow ADP + P_{i}$ has a negative $\Delta G$ value (approximately - 30.5 kJ/mol under standard conditions).

Step3: Classify the reaction type

Exergonic reactions have a negative $\Delta G$ and release energy, so this reaction is exergonic.

Step4: Answer question 17

When a phosphate group is transferred from ATP to another molecule to make it less stable, the second molecule is said to be phosphorylated.

Answer:

1. Released

a. Negative (approx. - 30.5 kJ/mol)
b. Exergonic

1. Phosphorylated