Which of the following statements bout enzymes is not true?

a) enzymes work best at a specified ph.
b) all enzymes have the same shape as their substrates.
c) enzymes are proteins
d) the shape of an enzyme allows it to do its job

Enzymes are affected by factors like temperature, pH, and other environmental factors. It is primarily a protein which has building blocks called amino acids. The shape of the substrate and the enzyme do not necessarily have the same shape because there are types called induced type of enzymes which depend on other external factors to fit the two entities