1. Which of the following statements about enzymes is false?   Enzymes are required in very small quantities.   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.   Hint Half-n-half Clue   2. Pepsin is an enzyme contained in _______ juice.   pancreatic   intestinal   gastric   Half-n-half Clue   3. Invertase is an enzyme present in the _______.   jejunum   ileum   duodenum   Half-n-half Clue   4. The liver secretes a chemical compound called bile, which contains no enzymes.   True   False   5. Which enzyme does not act on proteins?   trypsin   pepsin   erepsin   amylopsin   Half-n-half Clue   6. Erepsin is an enzyme contained in _______ juice.   gastric   pancreatic   intestinal   Half-n-half Clue   7. Trypsin is an enzyme contained in _______ juice.   gastric   pancreatic   intestinal   Half-n-half Clue