Question

question 3
which of the following does not describe enzymes?
some enzymes are protein plus a cofactor.
some enzymes are purely protein.
enzymes work by raising the energy of activation.
each enzyme is chemically specific.
clear selection

Explanation:

To solve this, we analyze each option:

• Some enzymes are protein + cofactor (e.g., holoenzymes), so this is correct.
• Some enzymes are purely protein (apoenzymes), so this is correct.
• Enzymes lower the activation energy, not raise it. So this statement is incorrect.
• Enzymes are chemically specific (specific to substrates), so this is correct.

Answer:

C. Enzymes work by raising the energy of activation.