BIOCHEMISTRY
ENZYMES AND METABOLISM
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
The products have more total energy than the reactants.
|
|
|
The reaction proceeds with a net release of free energy.
|
|
|
The reaction goes only in a forward direction:all reactants will be converted to products, but no products will be converted to reactants.
|
|
|
A net input of energy from the surroundings is required for the reactions to proceed.
|
Detailed explanation-1: -The correct answer is (B) The reactions proceed with a net release of free energy. (B) The reactions proceed with a net release of free energy. An exergonic reaction is a reaction that results in the release of energy to the surroundings.
Detailed explanation-2: -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-3: -In exergonic reaction the free energy of the products is lower than that of the reactants; meanwhile in endergonic the free energy of the products is higher than that of the reactants. The building of complex molecules, such as sugars, from simpler ones is an anabolic process and is endergonic.
Detailed explanation-4: -In chemical thermodynamics, an exergonic reaction is a chemical reaction where the change in the free energy is negative (there is a net release of free energy).
Detailed explanation-5: -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.