Question

Which is wrong about enzymes?

• A. Enzymes are mostly proteins but some are lipids also
• B. Enzymes are highly specific
• C. Enzymes require optimum pH and temperature for maximum activity
• D. Enzymes are denatured at high temperature

Answer 1

The correct option is A Enzymes are mostly proteins but some are lipids also

Enzymes are made up of proteins which accelerates the rate of the reaction. It lowers the activation energy and converts the reactants into the substrate. The increased temperature increases the kinetic energy of the enzymes which further accelerates the activity of the enzyme but at the higher temperature, it gets denatured as the peptide bonds between the proteins molecules breaks which disrupts the structure of enzymes.

Enzymatic activity depends on specific pH. pH at which the enzyme has maximum activity is known as optimum pH. The change in pH changes the shape of the enzyme which prevents the attachment of the substrate at the active site and terminates the reaction.

Enzymes are specific in nature. It forms an enzyme-substrate complex by attaching to the active site of the enzyme which depends specifically on the shape of the active site and the substrate molecules.

So, the correct answer is option A.