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

1. A

   1 only

   (a) 1 only. Statement 1 is true, but the stored key also accepts statement 2, so “only 1” is incomplete.

2. B

   2 only

   (b) 2 only. Drops the uncontroversial biocatalyst definition.

3. C

   Both 1 and 2

   (c) Both 1 and 2. Enzymes are biological catalysts, and the keyed reading treats them as acting at the site of production (intracellular action in the textbook sense). (c) Official key.

4. D

   Neither 1 nor 2

   (d) Neither. Both statements are taken as correct on this key.

Summary. Official key is (c). Enzymes are biocatalysts, and this paper treats their action as occurring where they are produced. Secreted digestive enzymes are a neighbouring distinction, not the keyed split.