1. The liver secretes a chemical compound called bile, which contains no enzymes.   True   False   2. Enzymes help to quicken the rate of chemical reactions in a living body and undergo changes during this process.   True   False   3. The large intestine does not secrete any enzymes.   True   False   4. Which enzyme acts on starch in the mouth and converts it into maltose?   pepsin   lactase   lipase   ptyalin   Hint Half-n-half Clue   5. Which of the following statements about enzymes is false?   Enzymes act best between a narrow range of temperature known as 'optimum temperature'.   Enzymes are vitamins by nature.   Enzymes act on a specific substrate to form a specific product.   Enzymes are required in very small quantities.   Half-n-half Clue   6. Which enzyme is not present in pancreatic juice?   amylopsin   pepsin   trypsin   steapsin   Half-n-half Clue   7. Amylopsin is an enzyme present in the _______.   jejunum   duodenum   ileum   Half-n-half Clue