Question

Which of the following statement about enzymes is true?

I. Enzymes do not alter the overall change in free energy for a reaction

II. Enzymes are proteins whose three dimensional shape is key to their functions

III. Enzymes speed up reactions by lowering activation energy

IV. Enzyme are highly specific for reactions

V. The shape of an enzyme does not effect its activity

VI. The energy input needed to start a chemical reactions is called activation energy

• A. All
• B. All except V
• C. V and VI
• D. II and IV

Answer 1

Answer: (A)

All