Most Reactions in the Body Occur Too Slowly to Sustain

Multiple Choice

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.