Which of the following statements regarding enzymes is true?

1.b:Enzymes increase the rate of reaction.

2.b:lowering the energy of activation of a reaction.

Explanation:

1.Enzyme : Enzymes are biological catalyst .It is defined as proteins binds to  a molecule and increase the rate of reaction.It does not change in the reaction only it increases the rate of reaction.

Enzyme does not decrease the free energy change of a reaction.Enzymes do not change in the concentration of substrate and do not prevent the changes in substrate concentration.It only increase the rate of reaction .

Therefore, option b is true.

b:Enzymes increase the rate of reaction.

2.Activation energy:It is defined that minimum energy which is required for molecules to start  the reaction .

When an enzyme catalyze a reaction then the activation energy of energy of molecules decreases and speed up the reaction.

Hence, option b is true.

Answer :b:lowering the energy of activation of a reaction.

the answer is a or when it says crossing over

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