Question

Which of the following statements regarding enzymes is true?

A) They decrease the rate of chemical reactions
B) They function optimally in extreme pH conditions
C) They are not affected by temperature changes
D) They are specific in their action on substrates

Answer 1

Enzymes are highly specific in their action and can only interact with specific substrates due to the complementary shape and chemical properties of the enzyme's active site and the substrate. Hence the correct answer is option D

Step-by-step explanation:

Enzymes are protein molecules that function as biological catalysts, speeding up chemical reactions in living organisms. The correct answer to the question is D) They are specific in their action on substrates.

Enzymes are highly specific in their action and can only interact with specific substrates, which are the molecules that the enzyme acts upon. This specificity is due to the complementary shape and chemical properties of the enzyme's active site and the substrate. For example, the enzyme lactase can only break down lactose, while the enzyme amylase can only break down starch.