If a chemical reaction requires an input of energy in order for it to occur, then the reaction is _____.Group of answer choicesexergonicendergonic

The correct answer is endergonic.

Detailed Explanation

An endergonic reaction is one that requires an input of energy to proceed. In such reactions, the changes in free energy are positive, indicating that energy must be supplied for the reaction to take place. This is in contrast to exergonic reactions, where energy is released as the reaction occurs, resulting in a decrease in free energy (negative changes in free energy).

In many biological systems, endergonic reactions are coupled with exergonic reactions, allowing cells to efficiently use energy from exergonic processes to drive endergonic reactions, such as the synthesis of glucose during photosynthesis.