Nursing Elites

1. The sugar to which all other sugars are converted during human metabolism is:

• A. sucrose
• B. fructose
• C. glucose
• D. maltose

Correct answer: C

Rationale: Glucose is the primary sugar used by the body for energy and is converted from other sugars during metabolism. Sucrose is a disaccharide composed of glucose and fructose, not the end product of sugar metabolism. Fructose is a simple sugar found in fruits but needs to be converted to glucose for cellular energy. Maltose is a disaccharide composed of two glucose units and is not the final product of sugar metabolism in humans.

2. From where are trypsin and chymotrypsin secreted?

• A. Small intestine.
• B. Liver.
• C. Stomach.
• D. Pancreas.

Correct answer: D

Rationale: Trypsin and chymotrypsin are enzymes involved in protein digestion. These enzymes are secreted by the pancreas, not the small intestine, liver, or stomach. The pancreas plays a crucial role in producing digestive enzymes that aid in breaking down proteins in the small intestine. The small intestine is the site where these enzymes act, not where they are secreted. The liver is responsible for producing bile, not digestive enzymes. The stomach secretes gastric juices but not trypsin and chymotrypsin. Therefore, the correct answer is the pancreas.

3. Which enzyme is secreted by the salivary glands?

• A. Pepsin.
• B. Trypsin.
• C. Sucrase.
• D. Amylase.

Correct answer: D

Rationale: The correct answer is D, amylase. Amylase is an enzyme produced by the salivary glands that initiates the digestion of carbohydrates in the mouth. Pepsin (choice A) is produced in the stomach to digest proteins, trypsin (choice B) is produced in the pancreas to digest proteins, and sucrase (choice C) is produced in the small intestine to break down sucrose. Therefore, choices A, B, and C are incorrect in the context of an enzyme secreted by the salivary glands.

4. Which of the following is an example of a disaccharide?

• A. Glucose.
• B. Fructose.
• C. Galactose.
• D. Maltose.

Correct answer: D

Rationale: The correct answer is D, Maltose. A disaccharide is formed when two monosaccharides are joined together. Glucose, fructose, and galactose are all monosaccharides, not disaccharides. Therefore, they are not examples of disaccharides.

5. The number of kilocalories provided by a food that contains 22g of fat is:

• A. 88
• B. 132
• C. 154
• D. 198

Correct answer: D

Rationale: The correct answer is D. Fat provides 9 kcal per gram, so 22 grams of fat will provide 198 kcal (22g * 9 kcal/g = 198 kcal). Choice A (88) is incorrect because it miscalculates the kcalories. Choice B (132) is incorrect as it does not consider the correct kcaloric value of fat. Choice C (154) is incorrect as it also does not calculate the kcalories accurately based on the fat content.

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