Statement I : The activity of an enzyme is pH-dependent.

Statement II :  A change in pH, affects the solubility of the enzyme in water.

Both  statement I and statement II  are correct 

The correct answer is Option (1) –Both  statement I and statement II  are correct

Almost all enzymes are proteins. There are some nucleic acids that behave like enzymes. These are called ribozymes. One can depict an enzyme by a line diagram. An enzyme like any protein has a primary structure, i.e., the amino acid sequence of the protein. An enzyme like any protein has a secondary and tertiary structure.

The activity of an enzyme is pH dependent because, with a change in pH, the enzymes are denatured. Change in pH also affects the solubility of enzyme in water.