Which of the following is true for all exergonic reactions?
a) the products have more total energy than the reactants.
b) the reaction proceeds with a net release of free energy.
c) the reaction goes only in a forward direction: all reactants will be converted to products, but no products will be converted to reactants.
d) a net input of energy from the surroundings is required for the reactions to proceed.

The answer is; B

All exergonic reaction release free energy into their surrounding environment. This is because the energy level of the reactants is higher than that of the products, therefore there is  a negative delta in a change of energy. Exergonic reactions occur spontaneously.

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a- all cells come from pre-existing cells