$$\text{ATP yield} = (\text{NADH} \times 2.5) + (\text{FADH}_2 \times 1.5)$$

Question 1

Which process describes the breakdown of triglycerides into glycerol and fatty acids?

Accepted Answer

Lipolysis

Question 2

During beta-oxidation, how many carbon atoms are removed from a fatty acid chain at a time?

Accepted Answer

2

Question 3

What is the net ATP yield from the complete oxidation of one molecule of palmitic acid?

Accepted Answer

$$334$$

Question 4

Which metabolic pathway is required as a 'primer' for the oxidation of fatty acids in the Krebs cycle?

Accepted Answer

Glycolysis

Question 5

If a person has 15 kg of body fat, approximately how many kilocalories does this represent?

Accepted Answer

$$140,000$$ kcal

Question 6

Which of the following is NOT a function of adipocytes?

Accepted Answer

Produce glucose from amino acids

Question 7

Which of the following statements about the energy content of macronutrients is correct?

Accepted Answer

Carbohydrates and proteins both provide approximately $$4$$ kcal/g

Question 8

What is the main metabolic fate of glycerol released from triglyceride breakdown?

Accepted Answer

Used in glycolysis as dihydroxyacetone phosphate

Question 9

Which equation correctly represents the ATP yield from NADH and FADH$$_2 in $$the electron transport chain?

Accepted Answer

$$	ext{ATP yield} = (	ext{NADH} 	imes 2.5) + (	ext{FADH}_2 	imes 1.5)$$

Question 10

Which process describes the formation of glycogen from glucose?

Accepted Answer

Glycogenesis

Question 11

During prolonged exercise, which substrate is primarily mobilized from adipocytes?

Accepted Answer

Fatty acids

Question 12

Which of the following is a correct statement about the role of carbohydrates in energy metabolism?

Accepted Answer

Carbohydrates are the only source of energy for the brain and nervous tissue

Question 13

Which metabolic pathway is responsible for the breakdown of glycogen to glucose?

Accepted Answer

Glycogenolysis

Question 14

A patient with cancer cachexia is losing weight rapidly. Which macronutrient is most likely being catabolized in excess?

Accepted Answer

Protein

Question 15

Which of the following best explains why the metabolizable energy from protein is less than its calorimeter value?

Accepted Answer

Some energy is lost as urea, which cannot be further metabolized

Question 16

Which of the following is a product of the Krebs cycle per turn for each acetyl-CoA?

Accepted Answer

$$3$$ NADH, $$1$$ FADH$$_2$$, $$1$$ ATP

Question 17

Which of the following is true regarding the rate of energy supply from carbohydrates and fats during exercise?

Accepted Answer

Carbohydrates supply energy more rapidly than fats

Question 18

Which term describes the process of creating new glucose from non-carbohydrate sources?

Accepted Answer

Gluconeogenesis

Question 19

Which of the following is a correct sequence of events in fatty acid metabolism?

Accepted Answer

Lipolysis → Beta-oxidation → Acetyl-CoA → Krebs cycle

Question 20

A person consumes excess carbohydrates. Which process is most likely to occur to store the excess energy?

Accepted Answer

Glycogenesis

Energy Metabolism and Storage in Human Physiology

Study Guide - Practice Questions