Which of the following are NOT true about enzymes? (Choose the three statements that are NOT TRUE) * Enzymes can denature (change shape) when exposed to extreme conditions.

Enzymes add extra energy to chemical reactions.

Enzymes are used up in chemical reactions, they cannot be reused.

Enzymes are a type of protein.

Enzymes reduce the amount of activation energy needed to start a reaction.

An enzyme's function is not related to its shape.

Explanation:

Firstly, enzymes do not add extra energy to chemical reactions. The heat energy can come as a burning fuel or from the surroundings.

Secondly, enzymes can be recycled and reused for the same type of reactions, provided that it has not denatured.

Lastly, the shape of an enzyme defines the enzyme's function. It is an important characteristic to identify what type of processes the enzyme can speed up.

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