Which of the given enzymes is responsible for the

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20 Questions About The Digestive System With Answers Questions

Question 1 of 5

Which of the given enzymes is responsible for the digestion of milk protein?

A. Erepsin B. Trypsin C. Pepsin D. Rennin

Correct Answer: D

Rationale: Rennin is responsible for the digestion of milk protein. Rennin is present in the human body in its inactive form called prorenin. When we consume milk, it reacts with the hydrochloric acid present in the stomach. Hydrochloric acid activates the inert prorenin and converts it into active Rennin.

Question 2 of 5

Four test tubes, each containing 2cm3 of amylase solution are treated as follows: 1 boiled, then cooled to 1 °C 2 boiled, then cooled to 25 °C 3 frozen, then warmed to 1 °C 4 frozen, then warmed to 25 °C 10 cm3 of starch solution were then added to each tube and after 5 minutes, 2 drops of iodine solution were added to each tube. Which row shows the results?

A. 1: blue-black, 2: blue-black, 3: yellow-brown, 4: yellow-brown B. 1: blue-black, 2: yellow-brown, 3: blue-black, 4: yellow-brown C. 1: yellow-brown, 2: blue-black, 3: blue-black, 4: yellow-brown D. 1: yellow-brown, 2: yellow-brown, 3: blue-black, 4: blue-black

Correct Answer: A

Rationale: Boiling denatures the enzyme permanently, while freezing does not affect its activity once thawed.

Question 3 of 5

When a person eats some egg white, protein and water enter the stomach. Which substances are found leaving the stomach and leaving the small intestine?

A. leaving the stomach: amino acids and water, leaving the small intestine: amino acids and water B. leaving the stomach: fatty acids, glycerol, and water, leaving the small intestine: fatty acids, glycerol, and water C. leaving the stomach: protein and water, leaving the small intestine: fatty acids and glycerol D. leaving the stomach: protein, amino acids, and water, leaving the small intestine: water

Correct Answer: A

Rationale: Proteins are partially digested in the stomach and converted to amino acids in the small intestine.

Question 4 of 5

Four bags made of partially permeable membrane are placed in tubes as shown in the diagram. bag made of partially permable membrane starch solution water reducing sugar solution water starch solution and saliva water tube 1 tube 2 tube 3 tube 4 saliva water After 20 minutes at 35 oC a sample of water from each tube, outside the bag, is boiled with Benedict's solution. What are the results?

A. tube 1: blue, tube 2: red, tube 3: blue, tube 4: red B. tube 1: blue, tube 2: blue, tube 3: red, tube 4: red C. tube 1: red, tube 2: blue, tube 3: blue, tube 4: red D. tube 1: red, tube 2: red, tube 3: blue, tube 4: blue

Correct Answer: A

Rationale: Only reducing sugars can pass through the membrane, turning Benedict's solution red, while starch cannot.

Question 5 of 5

Blood from the intestines travels to the liver via the:

A. hepatic artery B. mesenteric artery C. hepatic vein D. hepatic portal vein

Correct Answer: D

Rationale: The hepatic portal vein carries nutrient-rich blood from the intestines to the liver for processing before it enters systemic circulation.

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Which of the given enzymes is responsible for the digestion of milk protein?

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20 Questions About The Digestive System With Answers Questions

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