Question

Which one of the following is not an attribute of enzymes?

• A. They are specific
• B. They are not used in chemical reactions
• C. They are thermolabile
• D. They are proteinaceous

Answer 1

The correct option is B

They are not used in chemical reactions

The correct option is option (B):

Explanation of the correct option:

1. An enzyme is a type of biocatalyst that increases the rate of a reaction without altering the overall process.
2. Enzymes do not affect the free energy of reactants or products.
3. They only reduce the amount of activation energy required for the reaction to proceed.
4. As a result, they are used in chemical reactions.

Explanation of the incorrect option:

Option (A):

Enzymes are specialized proteins and have a high degree of specificity for their substrates.

Option (C):

Enzymes are thermolabile as they decompose or change in response to heat.

Option (D):

Enzymes are proteinaceous substances composed of globular protein with high molecular weights that catalyse reactions without changing themselves.

Final answer: Enzymes are not used in chemical reactions is not true for enzymes.