Question 1

Which of the following best describes the process of measuring the energy content of food using a calorimeter?

Accepted Answer

The food is burned, and the heat released is used to raise the temperature of a measured volume of water.

Question 2

A patient is found to have a deficiency in vitamin B12. Which of the following is most likely to occur as a result?

Accepted Answer

Pernicious anemia due to impaired absorption in the small intestine.

Question 3

Which of the following statements about essential nutrients is correct?

Accepted Answer

Essential nutrients must be obtained from the diet because the body cannot make them fast enough to meet demands.

Question 4

Which of the following best explains why red blood cells (RBCs) rely almost entirely on glucose for their energy needs?

Accepted Answer

RBCs lack mitochondria and therefore use anaerobic glycolysis to generate ATP from glucose.

Question 5

A diet lacking in linoleic and linolenic acids would most likely result in which of the following?

Accepted Answer

Impaired absorption of fat-soluble vitamins and poor neural development.

Question 6

Which of the following is a correct statement regarding the 'all-or-none' rule for protein synthesis?

Accepted Answer

All essential amino acids must be present in the cell at the same time for protein synthesis to occur.

Question 7

Which of the following equations correctly represents the hydrolysis of ATP?

Accepted Answer

$$\mathrm{ATP} \rightarrow \mathrm{ADP} + \mathrm{P_i} + \mathrm{E}$$

Question 8

A person consumes a diet high in carbohydrates. What is the primary fate of excess glucose in the body?

Accepted Answer

It is converted to glycogen for storage in the liver and skeletal muscles.

Question 9

Which of the following best describes the role of vitamins in metabolism?

Accepted Answer

They function primarily as coenzymes, speeding up reaction rates.

Question 10

A patient presents with cracked lips and mouth corners (cheilosis). Which vitamin deficiency is most likely responsible?

Accepted Answer

Vitamin B2 (riboflavin)

Question 11

Which of the following nutrients is considered a 'technical nutrient' because it provides no energy value but is essential for life?

Accepted Answer

Water

Question 12

Which of the following statements about lipid metabolism is correct?

Accepted Answer

Fats provide more than twice the calories per gram compared to carbohydrates or proteins.

Question 13

Which of the following best describes the difference between catabolism and anabolism?

Accepted Answer

Catabolism breaks down complex molecules and releases energy, while anabolism synthesizes complex molecules from simpler ones.

Question 14

Which of the following is a function of cholesterol in the body?

Accepted Answer

It helps stabilize cell membranes and serves as a precursor for bile salts and steroid hormones.

Question 15

A patient with a negative nitrogen balance is most likely experiencing which of the following?

Accepted Answer

Protein catabolism exceeds protein synthesis, leading to muscle wasting.

Question 16

Which of the following is required for the absorption of vitamin B12 in the small intestine?

Accepted Answer

Intrinsic factor

Question 17

Which of the following best explains why infants and children require a higher dietary intake of lipids compared to adults?

Accepted Answer

Lipids are essential for proper brain and neural development, as well as myelin sheath production.

Question 18

Which of the following is a correct sequence for the order in which the body utilizes nutrients for energy?

Accepted Answer

Carbohydrates \u003e Lipids \u003e Proteins

Question 19

Which of the following minerals is required only in trace amounts but is essential for proper thyroid function?

Accepted Answer

Iodine

Question 20

Which of the following best describes the process of phosphorylation in cellular metabolism?

Accepted Answer

The transfer of a high-energy phosphate group ($$\mathrm{PO}_4$$^{3-}$$) to another molecule, often activating enzymes.

Nutrition, Metabolism, and Body Temperature Regulation (Chapter 24, Part I) – Study Notes

Study Guide - Practice Questions