1. List the pH levels you recorded for each test tube. Answer: Test Tube pH Level 1 = 10 mL water TT2= 10 mL pepsin TT3= 10 mL HCl TT 4 =5 mL pepsin 5 mL sodium bicarbonate TT 5 = 5 mL pepsin 5 mL HCl
2. Using the descriptions of the egg white that you wrote in the Student Guide, rank the test tubes in order of greatest amount of digestion to least amount of digestion. For each tube, explain why it would have exhibited that level of digestion.
Answer:
Tube with greatest amount of digestion:
Tube with next greatest amount:
Tube with next greatest amount:
Tube with next greatest amount:
Tube with least amount of digestion:
3. Compare the contents and digestive results in Test Tubes 1, 2, 3, 4, and 5.
Describe the optimal chemical surroundings for pepsin to break down proteins.
Answer:
4. In which test tube was the activity most like that of a real human stomach? Explain. Answer:
