Which of the following statements about enzymes is/are correct?
1. They are biocatalysts.
2. They perform their action on the site where they are produced. Select the correct answer from the codes given below:

Correct answers: (a) 1 only or (c) Both 1 and 2

Explanation

Enzymes are biocatalysts (mostly proteins) that speed up reactions by lowering the activation energy, so statement 1 is correct.

Many enzymes act inside the cell that makes them, but digestive enzymes such as pepsin and trypsin are made in glands and act in the gut, so statement 2 is not true of all enzymes.

The key in the source is (c), both statements; (a), statement 1 only, is also accepted here.