Most reactions in the body occur too slowly to sustain life. This is because
A) many reactions require large inputs of activation energy.
B) all reactions in the body are endergonic.
C) there is not enough ATP in body cells.
D) most biological catalysts are not active at body temperature (37°C).
E) no catalysts are present in body cells.

Question

Quizplus · Accepted Answer

Many reactions in the body require large inputs of activation energy to proceed at a significant rate. Enzymes, which are biological catalysts, lower the activation energy needed for reactions, allowing them to occur more rapidly and at temperatures that are compatible with life.

Most Reactions in the Body Occur Too Slowly to Sustain