Which of the following is true about enzymes?
A)The catalytic site is responsible for substrate specificity.
B)Reactions catalyzed by enzymes give the products more free energy than reactions that occur spontaneously.
C)The rate of an enzymatic reaction is always proportional to the concentration of the substrate .
D)Enzymes increase reaction rates by lowering the activation energy needed to reach the transition state.

Question

Quizplus · Accepted Answer

Enzymes lower the activation energy needed to reach the transition state, which increases the rate of the reaction. The catalytic site of an enzyme is responsible for substrate specificity, but this is not unique to enzymes as other proteins can also have a specific active site. Enzymatic reactions may give products more or less energy than spontaneous reactions, depending on the specific reaction. The rate of an enzymatic reaction may not always be proportional to the concentration of substrate, as there may be factors that influence the enzyme's activity beyond substrate concentration.

Which of the Following Is True About Enzymes