AP BIOLOGY

Detailed explanation-1: -Endergonic reactions absorb energy from their surroundings. The chemical bonds that are formed from the reaction are weaker than the chemical bonds that were broken.

Detailed explanation-2: -Endergonic reactions require an input of energy; the ∆G for that reaction will be a positive value. Exergonic reactions release free energy; the ∆G for that reaction will be a negative value.

Detailed explanation-3: -Endergonic and exergonic reactions Exergonic reactions are also called spontaneous reactions, because they can occur without the addition of energy. Reactions with a positive ∆G (∆G > 0), on the other hand, require an input of energy and are called endergonic reactions.

Detailed explanation-4: -Exergonic reactions require a small amount of energy input to get going, before they can proceed with their energy-releasing steps. These reactions have a net release of energy, but still require some energy input in the beginning.

Detailed explanation-5: -An endergonic reaction (such as photosynthesis) is a reaction that requires energy to be driven. Endergonic means “absorbing energy in the form of work.” The activation energy for the reaction is typically larger than the overall energy of the exergonic reaction (1). Endergonic reactions are nonspontaneous.