Question 1

Which of the following best describes the process of oxidative phosphorylation in cellular respiration?

Accepted Answer

It is the production of ATP via the electron transport chain, where electrons are passed along a series of proteins, ultimately producing the majority of ATP.

Question 2

A patient presents with rapid breathing, fruity-smelling breath, and confusion. Laboratory tests reveal a low blood pH and the presence of ketone bodies in the urine. Which metabolic condition is most likely responsible?

Accepted Answer

Metabolic acidosis resulting from ketosis due to excessive fat breakdown

Question 3

Which of the following statements about essential nutrients is correct?

Accepted Answer

Essential nutrients are molecules that cannot be produced by the liver and must be obtained from the diet.

Question 4

A vegetarian wants to ensure they are consuming all essential amino acids. Which dietary strategy would best achieve this?

Accepted Answer

Consuming a mix of cereal grains and legumes

Question 5

Which of the following best explains why water-soluble vitamins (such as vitamin C and most B vitamins) are less likely to reach toxic levels in the body compared to fat-soluble vitamins?

Accepted Answer

They are excreted in the urine when consumed in excess.

Question 6

Which of the following is a correct sequence of events during aerobic cellular respiration?

Accepted Answer

Glycolysis → Krebs Cycle → Electron Transport System

Question 7

If a person’s diet is deficient in carbohydrates, which metabolic process allows the liver to maintain blood glucose levels?

Accepted Answer

Gluconeogenesis

Question 8

Which of the following best describes the role of LDLs (Low Density Lipoproteins) in cholesterol transport?

Accepted Answer

They transport cholesterol to peripheral tissues for membrane and hormone synthesis.

Question 9

A patient is recovering from a severe burn and is found to be in positive nitrogen balance. What does this indicate about their protein metabolism?

Accepted Answer

Protein synthesis exceeds protein breakdown.

Question 10

Which of the following is NOT a function of lipids in the body?

Accepted Answer

Acting as coenzymes in metabolic reactions

Question 11

A person consumes a diet high in saturated fats and cholesterol. According to the American Heart Association, which of the following recommendations should they follow to reduce cardiovascular risk?

Accepted Answer

Limit saturated fat to 10% or less of total fat intake.

Question 12

Which of the following best describes the fate of excess glucose in the body when ATP reserves are high?

Accepted Answer

It is converted to glycogen or fat for storage.

Question 13

Which of the following is a consequence of incomplete fat oxidation during periods of carbohydrate deficiency?

Accepted Answer

Accumulation of ketone bodies leading to ketosis

Question 14

Which of the following vitamins can be synthesized by the body or by bacteria in the gut, and therefore is not strictly required in the diet?

Accepted Answer

Vitamin D

Question 15

A patient with a diet extremely low in protein is likely to experience which of the following metabolic states?

Accepted Answer

Negative nitrogen balance

Question 16

Which of the following best explains why proteins are not the cell’s preferred energy source?

Accepted Answer

Proteins are primarily needed for structural and functional roles in the body.

Question 17

Which of the following is a correct description of substrate-level phosphorylation?

Accepted Answer

ATP is produced directly by transferring a phosphate group from an intermediate substrate to ADP.

Question 18

Which of the following minerals is most important for bone mineralization and is required in moderate amounts by the body?

Accepted Answer

Calcium $$(Ca^{2+})$$

Question 19

A patient with liver failure is likely to have problems with all of the following EXCEPT:

Accepted Answer

Transporting oxygen in the blood

Question 20

Which of the following best describes the fate of the amine group during amino acid catabolism?

Accepted Answer

It is combined with carbon dioxide to form urea, which is excreted in urine.

Chapter 24: Nutrition, Metabolism, and Body Temperature Regulation: Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards