Question 1

Which process is responsible for breaking down triglycerides into fatty acids and glycerol during lipid catabolism?

Accepted Answer

Lipolysis

Question 2

During beta-oxidation, what is the primary product generated from fatty acids that enters the citric acid cycle?

Accepted Answer

Acetyl CoA

Question 3

Which organ is primarily responsible for ketogenesis, and what is a potential consequence of excessive ketone body production?

Accepted Answer

Liver; ketoacidosis

Question 4

A patient with uncontrolled diabetes is found to have a low blood pH. Which metabolic process is most likely responsible for this finding?

Accepted Answer

Ketogenesis

Question 5

Which equation best represents the removal of an amino group from an amino acid during transamination?

Accepted Answer

$$\mathrm{Amino\ acid} + \mathrm{\alpha-ketoglutarate} \rightarrow \mathrm{\alpha-keto\ acid} + \mathrm{Glutamate}$$

Question 6

Which statement best describes the fate of excess dietary amino acids in the human body?

Accepted Answer

They are converted to glucose or fatty acids for storage.

Question 7

Fatty acid synthesis (lipogenesis) is most similar to which other metabolic process, but in reverse?

Accepted Answer

Beta-oxidation

Question 8

Which enzyme is responsible for lengthening the fatty acid chain by two carbon units during lipogenesis?

Accepted Answer

Fatty acid synthase

Question 9

In which cellular compartment does beta-oxidation of fatty acids primarily occur?

Accepted Answer

Mitochondrial matrix

Question 10

Which of the following is NOT a dietary source of protein?

Accepted Answer

Olive oil

Question 11

A person consumes excess carbohydrates. Which pathway will most likely convert the excess glucose into storage form in adipocytes?

Accepted Answer

Lipogenesis

Question 12

Which process involves the joining of amino acids by peptide bonds to form proteins?

Accepted Answer

Amino acid anabolism

Question 13

Which of the following statements about protein storage is correct?

Accepted Answer

Proteins are not stored; excess is converted to glucose or fatty acids.

Question 14

Which metabolic pathway converts glycerol, derived from triglyceride breakdown, into a glycolytic intermediate?

Accepted Answer

Glycerol is converted to glyceraldehyde-3-phosphate

Question 15

Which of the following is a consequence of unchecked ketogenesis in the liver?

Accepted Answer

Decreased blood pH (ketoacidosis)

Question 16

Which process is responsible for the conversion of excess amino acids into glucose?

Accepted Answer

Gluconeogenesis

Question 17

During nutrient anabolism, which process allows the body to synthesize non-essential amino acids?

Accepted Answer

Adding an amino group to a carbon skeleton

Question 18

Which of the following best explains why proteins must be supplied regularly in the diet?

Accepted Answer

Proteins are not stored like carbohydrates and lipids.

Question 19

Which metabolic process is most active in the cytosol and involves the enzyme fatty acid synthase?

Accepted Answer

Lipogenesis

Question 20

A patient is fasting for several days. Which metabolic pathway is most likely to be upregulated in the liver to provide energy for the brain?

Accepted Answer

Ketogenesis

Lipid and Protein Metabolism: Catabolism and Anabolism

Study Guide - Practice Questions