BIOD 121 ESSENTIALS IN NUTRITION MODULE 1 STUDY GUIDE | TESTBANK |
PRACTICE QUESTIONS & ANSWERS | COMPREHENSIVE PRACTICE EXAM |
ADVANCED REVIEW | LATEST UPDATE 2026/2027
Examiner:
Portage Learning
TABLE OF CONTENTS
1. Introduction to Human Nutrition
2. Essential Nutrients
3. Energy Balance and Metabolism
4. Digestion and Absorption
5. Carbohydrates
6. Lipids
7. Proteins
8. Vitamins
9. Minerals
10. Water and Fluid Balance
11. Dietary Reference Intakes
12. Nutrition Assessment
13. Healthy Eating Guidelines
14. Nutrition Labels
15. Nutrition Throughout the Life Cycle
16. Chronic Disease Prevention
17. Food Safety
18. Professional Nutrition Decision-Making
ESSENTIAL NUTRIENTS || ENERGY METABOLISM || CARBOHYDRATES || LIPIDS ||
PROTEINS || VITAMINS || MINERALS || DIGESTION || ABSORPTION || HOMEOSTASIS
|| DIETARY REFERENCE INTAKES || ENERGY BALANCE || FOOD LABELS ||
MALNUTRITION || HEALTH PROMOTION || NUTRITION ASSESSMENT || DISEASE
PREVENTION || DIETARY GUIDELINES || WATER BALANCE || MACRONUTRIENTS
,QUESTION 1.
A nutrition researcher compares two individuals who consume identical diets, yet one
consistently maintains body weight while the other gains weight over several
months. Which explanation best reflects the principle of energy balance?
A. The weight-stable individual has total energy expenditure approximately equal to
energy intake.
B. Dietary protein alone determines long-term body weight.
C. Carbohydrate intake is the sole determinant of adipose tissue accumulation.
D. Vitamins contribute more calories than fats when consumed in excess.
Correct Answer: A. The weight-stable individual has total energy expenditure
approximately equal to energy intake.
Explanation: Energy balance depends on the relationship between energy intake
and total energy expenditure. When these values are approximately equal, body
weight tends to remain stable over time. Protein quality, carbohydrate intake alone,
and vitamin consumption do not independently determine long-term energy
balance.
────────────────────────────────────────
QUESTION 2.
A patient has difficulty absorbing fat-soluble vitamins following surgical removal of
part of the small intestine. Which nutrient would most likely be affected by this
impairment?
A. Vitamin C
B. Vitamin D
C. Vitamin B12
D. Folate
Correct Answer: B. Vitamin D
Explanation: Vitamin D is a fat-soluble vitamin that requires normal lipid digestion
and absorption. Impaired fat absorption commonly reduces the uptake of vitamins
, A, D, E, and K. Vitamin C, folate, and most B vitamins are water-soluble and follow
different absorption pathways.
────────────────────────────────────────
QUESTION 3.
A dietitian explains that carbohydrates are considered the body's preferred energy
source because they:
A. Yield more calories per gram than dietary fat.
B. Are stored in unlimited quantities as glycogen.
C. Can be rapidly converted into glucose for ATP production.
D. Eliminate the need for protein metabolism.
Correct Answer: C. Can be rapidly converted into glucose for ATP production.
Explanation: Glucose derived from carbohydrates serves as the primary fuel for
many tissues, especially the brain under normal physiological conditions. Fat
provides more calories per gram, glycogen storage is limited, and protein continues
to serve numerous essential structural and functional roles.
────────────────────────────────────────
QUESTION 4.
During a nutrition assessment, a clinician evaluates whether a nutrient is essential.
Which criterion best defines an essential nutrient?
A. It supplies at least 9 kcal/g.
B. It is synthesized in unlimited quantities by the liver.
C. It is found exclusively in animal products.
D. It cannot be synthesized in sufficient amounts by the body and must be obtained
through the diet.
Correct Answer: D. It cannot be synthesized in sufficient amounts by the body
and must be obtained through the diet.
, Explanation: Essential nutrients are required because the body either cannot
produce them or cannot produce adequate amounts to meet physiological needs.
Caloric value, food source, and hepatic synthesis are not defining characteristics of
essentiality.
────────────────────────────────────────
QUESTION 5.
Which statement best distinguishes digestion from absorption?
A. Digestion is the enzymatic breakdown of food, whereas absorption is the
movement of nutrients into circulation.
B. Digestion occurs only in the stomach, whereas absorption occurs only in the colon.
C. Digestion refers to nutrient transport into cells after circulation.
D. Absorption occurs before digestion for all nutrients.
Correct Answer: A. Digestion is the enzymatic breakdown of food, whereas
absorption is the movement of nutrients into circulation.
Explanation: Digestion reduces food into absorbable components through
mechanical and chemical processes. Absorption transfers those components across
the intestinal wall into the blood or lymph. The remaining options inaccurately
describe the locations or sequence of these processes.
────────────────────────────────────────
QUESTION 6.
A nutrition scientist evaluates the energy contribution of dietary fat. Compared with
carbohydrates, fat provides:
A. Half as many kilocalories per gram.
B. Approximately the same number of kilocalories per gram.
C. More than twice the kilocalories per gram.
D. No usable energy under normal physiological conditions.
PRACTICE QUESTIONS & ANSWERS | COMPREHENSIVE PRACTICE EXAM |
ADVANCED REVIEW | LATEST UPDATE 2026/2027
Examiner:
Portage Learning
TABLE OF CONTENTS
1. Introduction to Human Nutrition
2. Essential Nutrients
3. Energy Balance and Metabolism
4. Digestion and Absorption
5. Carbohydrates
6. Lipids
7. Proteins
8. Vitamins
9. Minerals
10. Water and Fluid Balance
11. Dietary Reference Intakes
12. Nutrition Assessment
13. Healthy Eating Guidelines
14. Nutrition Labels
15. Nutrition Throughout the Life Cycle
16. Chronic Disease Prevention
17. Food Safety
18. Professional Nutrition Decision-Making
ESSENTIAL NUTRIENTS || ENERGY METABOLISM || CARBOHYDRATES || LIPIDS ||
PROTEINS || VITAMINS || MINERALS || DIGESTION || ABSORPTION || HOMEOSTASIS
|| DIETARY REFERENCE INTAKES || ENERGY BALANCE || FOOD LABELS ||
MALNUTRITION || HEALTH PROMOTION || NUTRITION ASSESSMENT || DISEASE
PREVENTION || DIETARY GUIDELINES || WATER BALANCE || MACRONUTRIENTS
,QUESTION 1.
A nutrition researcher compares two individuals who consume identical diets, yet one
consistently maintains body weight while the other gains weight over several
months. Which explanation best reflects the principle of energy balance?
A. The weight-stable individual has total energy expenditure approximately equal to
energy intake.
B. Dietary protein alone determines long-term body weight.
C. Carbohydrate intake is the sole determinant of adipose tissue accumulation.
D. Vitamins contribute more calories than fats when consumed in excess.
Correct Answer: A. The weight-stable individual has total energy expenditure
approximately equal to energy intake.
Explanation: Energy balance depends on the relationship between energy intake
and total energy expenditure. When these values are approximately equal, body
weight tends to remain stable over time. Protein quality, carbohydrate intake alone,
and vitamin consumption do not independently determine long-term energy
balance.
────────────────────────────────────────
QUESTION 2.
A patient has difficulty absorbing fat-soluble vitamins following surgical removal of
part of the small intestine. Which nutrient would most likely be affected by this
impairment?
A. Vitamin C
B. Vitamin D
C. Vitamin B12
D. Folate
Correct Answer: B. Vitamin D
Explanation: Vitamin D is a fat-soluble vitamin that requires normal lipid digestion
and absorption. Impaired fat absorption commonly reduces the uptake of vitamins
, A, D, E, and K. Vitamin C, folate, and most B vitamins are water-soluble and follow
different absorption pathways.
────────────────────────────────────────
QUESTION 3.
A dietitian explains that carbohydrates are considered the body's preferred energy
source because they:
A. Yield more calories per gram than dietary fat.
B. Are stored in unlimited quantities as glycogen.
C. Can be rapidly converted into glucose for ATP production.
D. Eliminate the need for protein metabolism.
Correct Answer: C. Can be rapidly converted into glucose for ATP production.
Explanation: Glucose derived from carbohydrates serves as the primary fuel for
many tissues, especially the brain under normal physiological conditions. Fat
provides more calories per gram, glycogen storage is limited, and protein continues
to serve numerous essential structural and functional roles.
────────────────────────────────────────
QUESTION 4.
During a nutrition assessment, a clinician evaluates whether a nutrient is essential.
Which criterion best defines an essential nutrient?
A. It supplies at least 9 kcal/g.
B. It is synthesized in unlimited quantities by the liver.
C. It is found exclusively in animal products.
D. It cannot be synthesized in sufficient amounts by the body and must be obtained
through the diet.
Correct Answer: D. It cannot be synthesized in sufficient amounts by the body
and must be obtained through the diet.
, Explanation: Essential nutrients are required because the body either cannot
produce them or cannot produce adequate amounts to meet physiological needs.
Caloric value, food source, and hepatic synthesis are not defining characteristics of
essentiality.
────────────────────────────────────────
QUESTION 5.
Which statement best distinguishes digestion from absorption?
A. Digestion is the enzymatic breakdown of food, whereas absorption is the
movement of nutrients into circulation.
B. Digestion occurs only in the stomach, whereas absorption occurs only in the colon.
C. Digestion refers to nutrient transport into cells after circulation.
D. Absorption occurs before digestion for all nutrients.
Correct Answer: A. Digestion is the enzymatic breakdown of food, whereas
absorption is the movement of nutrients into circulation.
Explanation: Digestion reduces food into absorbable components through
mechanical and chemical processes. Absorption transfers those components across
the intestinal wall into the blood or lymph. The remaining options inaccurately
describe the locations or sequence of these processes.
────────────────────────────────────────
QUESTION 6.
A nutrition scientist evaluates the energy contribution of dietary fat. Compared with
carbohydrates, fat provides:
A. Half as many kilocalories per gram.
B. Approximately the same number of kilocalories per gram.
C. More than twice the kilocalories per gram.
D. No usable energy under normal physiological conditions.
