Question

Which of the following statements is wrong in case of enzyme catalysis?
A. Enzymes work best at an optimum temperature
B. Enzymes work at an optimum pH
C. Enzymes are highly specific for substances
D. An enzyme raises activation energy

Answer 1

Hint: A catalyst that is found in living beings and whose function is facilitating different chemical reactions of a living bone is called an enzyme. The names of some enzymes are lactase, lipase, amylase, protease, etc.

Complete Step by Step Answer:
The working of an enzyme is possible only at the right temperature. If the temperature exceeds, the enzyme will be completely destroyed. Therefore, option A is true in the case of the catalysis of enzymes.
The working of enzymes is also dependent on pH. So, enzyme action is done at optimum pH. Therefore, the B option is also true.

The working of an enzyme happens through an enzyme-substrate reaction. In the action of enzymes, the substrate gets attached to the active sites of an enzyme, and catalysis of the reaction occurs. At last, the product and the enzyme got separated. Therefore, the C option is also true.

Option D says that an enzyme increases activation energy. But, we know enzyme functions in speeding up a reaction. So, it lowers activation energy. Therefore, the D option states the wrong statement regarding the enzymes.
Hence, B option is right.

Note: It is to be noted that, there are some properties of an enzyme, such as it is highly specific, and only a single reaction is catalyzed by them. Their structure remains the same when the reaction is completed. They bind to only specific substrates.