1. Invertase is an enzyme present in the _______.   duodenum   ileum   jejunum   Hint Half-n-half Clue   2. Which of the following statements about enzymes is false?   Enzymes act on a specific substrate to form a specific product.   Enzymes are vitamins by nature.   Enzymes act best between a narrow range of temperature known as 'optimum temperature'.   Enzymes are required in very small quantities.   Half-n-half Clue   3. Erepsin is an enzyme contained in _______ juice.   pancreatic   intestinal   gastric   Half-n-half Clue   4. Pepsin is an enzyme contained in _______ juice.   gastric   pancreatic   intestinal   Half-n-half Clue   5. The large intestine does not secrete any enzymes.   True   False   6. Enzymes help to quicken the rate of chemical reactions in a living body and undergo changes during this process.   True   False   7. Which enzyme does not act on carbohydrates?   ptyalin   invertase   steapsin   amylopsin   Half-n-half Clue