Question 1

Which of the following best describes the process of hydrolysis as it relates to carbohydrate digestion?

Accepted Answer

Hydrolysis is the breakdown of polysaccharides into monosaccharides by adding water, catalyzed by enzymes.

Question 2

A patient with lactose intolerance is most likely to experience which of the following symptoms after consuming dairy products?

Accepted Answer

Abdominal bloating, gas, and diarrhea due to undigested lactose in the colon.

Question 3

Which of the following statements about dietary fiber is TRUE?

Accepted Answer

Soluble fiber can help lower blood cholesterol by binding bile acids in the intestine.

Question 4

Which hormone is primarily responsible for lowering blood glucose levels after a carbohydrate-rich meal?

Accepted Answer

Insulin

Question 5

A food has a glycemic index (GI) of 85. What does this indicate about the food's effect on blood glucose?

Accepted Answer

It causes a rapid and high increase in blood glucose compared to pure glucose.

Question 6

Which of the following is a correct pairing of a disaccharide and its component monosaccharides?

Accepted Answer

Lactose: glucose + galactose

Question 7

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

Accepted Answer

They provide insulation and energy storage.

Question 8

Which of the following statements about saturated and unsaturated fatty acids is TRUE?

Accepted Answer

Saturated fatty acids are associated with increased risk of heart disease.

Question 9

During lipid digestion, which hormone signals the gallbladder to release bile into the small intestine?

Accepted Answer

Cholecystokinin (CCK)

Question 10

Which lipoprotein is responsible for transporting cholesterol from the tissues back to the liver for excretion?

Accepted Answer

HDL

Question 11

A person consumes a meal high in added sugars. Which of the following is NOT a potential negative health effect of excessive added sugar intake?

Accepted Answer

Improved insulin sensitivity

Question 12

Which of the following best describes a complete (high-quality) protein?

Accepted Answer

A protein that contains all essential amino acids in adequate amounts.

Question 13

Which element is found in proteins but not in carbohydrates or lipids?

Accepted Answer

Nitrogen

Question 14

What is the primary function of the R group (side chain) in an amino acid?

Accepted Answer

It determines the amino acid's unique properties and function.

Question 15

Which of the following best describes the process of denaturation of a protein?

Accepted Answer

Unfolding of the protein's structure due to heat, acid, or agitation, resulting in loss of function.

Question 16

A vegetarian combines rice and beans in a meal. This is an example of:

Accepted Answer

Complementary proteins, which together provide all essential amino acids.

Question 17

Which of the following equations correctly represents the calculation of Body Mass Index (BMI) in metric units?

Accepted Answer

$$BMI = \frac{weight\ (kg)}{$$height^2$$\ (m^2$)}$$

Question 18

Which of the following best describes the process of gluconeogenesis?

Accepted Answer

The synthesis of glucose from non-carbohydrate sources such as amino acids.

Question 19

Which of the following dietary strategies is most effective for reducing the glycemic response to a meal?

Accepted Answer

Consuming foods high in soluble fiber and low in added sugars.

Question 20

Which of the following statements about non-nutritive sweeteners is TRUE?

Accepted Answer

They are considered safe for the general population when consumed within recommended limits.

Comprehensive Study Notes: Carbohydrates, Lipids, and Proteins (Chapters 4, 5, and 6)

Study Guide - Practice Questions