Q: Which of the following equations correctly represents the maximum ATP yield from the complete aerobic oxidation of one molecule of glucose?

$$\text{Glucose} + 6\,O_2$ \rightarrow 6\,CO_2$ + 6\,H_2O + 32\,ATP$$

Question 1

Which of the following best describes the difference between anabolism and catabolism in cellular metabolism?

Accepted Answer

Anabolism builds larger molecules from smaller ones, requiring energy input, while catabolism breaks down complex molecules into simpler ones, releasing energy.

Question 2

A patient is found to have a deficiency in intrinsic factor. Which vitamin's absorption will be most directly affected?

Accepted Answer

Vitamin B12

Question 3

Which process is responsible for the formation of glucose from non-carbohydrate sources such as amino acids and glycerol during prolonged fasting?

Accepted Answer

Gluconeogenesis

Question 4

A person consumes a meal high in carbohydrates. Which hormone is primarily responsible for promoting the storage of excess glucose as glycogen in the liver and muscle?

Accepted Answer

Insulin

Question 5

Which of the following statements about fat-soluble vitamins is correct?

Accepted Answer

Fat-soluble vitamins can accumulate in the liver and reach toxic levels if consumed in excess.

Question 6

A patient with liver failure is unable to efficiently convert ammonia to urea. What is the most likely consequence?

Accepted Answer

Accumulation of ammonia in the blood, leading to toxicity

Question 7

Which of the following best explains why fats yield more energy per gram than carbohydrates or proteins?

Accepted Answer

Fats have a higher proportion of carbon-hydrogen bonds, which release more energy when oxidized.

Question 8

Which of the following is an essential fatty acid that must be obtained from the diet because the body cannot synthesize it?

Accepted Answer

Linoleic acid

Question 9

A person is on a low-carbohydrate diet and has depleted their glycogen stores. Which metabolic pathway will be most active to maintain blood glucose levels?

Accepted Answer

Gluconeogenesis

Question 10

Which of the following best describes the role of the electron transport chain in cellular respiration?

Accepted Answer

It uses the energy from reduced coenzymes to generate ATP and water.

Question 11

A patient is found to have a diet lacking in complete proteins. Which of the following is the most likely consequence?

Accepted Answer

Inability to synthesize all essential amino acids, leading to impaired protein synthesis

Question 12

Which mineral is most directly involved in the formation of strong bones and teeth, and also plays a role in muscle contraction and nerve transmission?

Accepted Answer

Calcium

Question 13

During the post-absorptive state, which hormone is primarily responsible for increasing blood glucose levels by stimulating glycogenolysis and gluconeogenesis?

Accepted Answer

Glucagon

Question 14

Which of the following best explains why water-soluble vitamins must be consumed regularly in the diet?

Accepted Answer

They are not stored in the body and are excreted in urine if not used.

Question 15

A patient is found to have high blood cholesterol despite a low-cholesterol diet. Which organ is most likely responsible for the majority of cholesterol found in the blood?

Accepted Answer

Liver

Question 16

Which of the following equations correctly represents the maximum ATP yield from the complete aerobic oxidation of one molecule of glucose?

Accepted Answer

$$	ext{Glucose} + 6\,O_2$ ightarrow 6\,CO_2$ + 6\,H_2O + 32\,ATP$$

Question 17

Which of the following best describes the role of the liver in protein metabolism?

Accepted Answer

The liver deaminates amino acids, forms urea, and synthesizes plasma proteins.

Question 18

A person is found to have a metabolic rate significantly higher than average. Which hormone is most likely elevated in this individual?

Accepted Answer

Thyroxine

Question 19

Which of the following best explains why cellulose, an insoluble fiber, is important in the human diet?

Accepted Answer

It increases stool bulk and facilitates defecation.

Question 20

A patient is unable to absorb fat due to a pancreatic disorder. Which of the following vitamins is most likely to become deficient first?

Accepted Answer

Vitamin A

Chapter 24: Nutrition, Metabolism, and Energy Balance – Study Notes

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