Circle the letter of each sentence that is true about digestive enzymes a. Enzymes require just the right temperature and pH to work
b. The pH must be neutral for all enzymes to work
c. Some enzymes require the pH to be high
d. Some enzymes require the pH to be low

Which of the following is the correct definition of chemical energy? a. energy an object has because of its motion or position b. energy resulting from the flow of charged particles, such as electrons or ions c. energy produced from the splitting of atoms d. energy stored in chemical bonds of molecules