Question 1

Which of the following best describes an essential nutrient?

Accepted Answer

A nutrient that must be obtained from the diet because the body cannot synthesize it.

Question 2

A dietary 'Calorie' is defined as the amount of heat needed to raise the temperature of:

Accepted Answer

1 kilogram of water by 1°C

Question 3

Which of the following statements about saturated and unsaturated fats is correct?

Accepted Answer

Unsaturated fats contain one or more double bonds between carbon atoms.

Question 4

Which process is responsible for the breakdown of complex molecules into simpler ones, such as the conversion of proteins into amino acids?

Accepted Answer

Catabolism

Question 5

A patient is unable to synthesize some amino acids and must obtain them from their diet. These amino acids are classified as:

Accepted Answer

Essential amino acids

Question 6

Which vitamin is water-soluble and plays a key role in energy metabolism?

Accepted Answer

Vitamin C

Question 7

Which mineral is essential for oxygen transport in the blood?

Accepted Answer

Iron

Question 8

During glycolysis, what are the net products generated from one molecule of glucose?

Accepted Answer

2 pyruvic acids, 2 NADH, and 2 ATP

Question 9

Which of the following best describes substrate-level phosphorylation?

Accepted Answer

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

Question 10

Which coenzyme is responsible for transferring hydrogen atoms during cellular oxidation reactions?

Accepted Answer

Dehydrogenase

Question 11

In the electron transport chain, which molecule donates electrons to Complex I?

Accepted Answer

NADH

Question 12

Which of the following is a major function of lipids in the body?

Accepted Answer

Providing insulation and energy storage

Question 13

A person consumes a diet high in saturated fats. Which of the following health risks is most directly associated with this dietary pattern?

Accepted Answer

Elevated blood cholesterol and cardiovascular disease

Question 14

Which equation correctly represents the net ATP yield from the complete aerobic oxidation of one glucose molecule?

Accepted Answer

$$\approx 30 	ext{ ATP}$$

Question 15

Which of the following statements about oxidative phosphorylation is correct?

Accepted Answer

It uses a proton gradient across the mitochondrial membrane to drive ATP synthesis.

Question 16

Which vitamin is fat-soluble and important for vision and immune function?

Accepted Answer

Vitamin A

Question 17

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

Accepted Answer

Storing genetic information

Question 18

Which of the following minerals is most important for bone health?

Accepted Answer

Calcium

Question 19

During the transitional phase between glycolysis and the citric acid cycle, what is the fate of the carbon removed from pyruvic acid?

Accepted Answer

It diffuses into the blood as CO2 and is expelled by the lungs.

Question 20

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

Accepted Answer

They act as coenzymes, assisting in biochemical reactions.

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

Study Guide - Practice Questions