HNSC MIDTERM EXAM: 200 COMPREHENSIVE QUESTIONS COVERING
CHAPTERS 1-4 WITH COMPLETE RATIONALES
1. Which of the following is considered a macronutrient?
A. Calcium
B. Vitamin C
C. Protein
D. Iron
Correct Answer: C
Rationale: Protein is a macronutrient, which are nutrients needed in
large amounts (gram quantities) daily. Calcium, Vitamin C, and Iron are
micronutrients, needed in smaller amounts.
2. What is the primary function of adipose tissue in the body?
A. To produce digestive enzymes
B. To store energy and provide insulation
C. To transport oxygen in the blood
D. To regulate blood glucose levels
Correct Answer: B
Rationale: Adipose tissue, or body fat, primarily stores excess energy in
the form of triglycerides and provides insulation and protection for
organs.
3. A food label claims a product is "a good source of calcium." This
means one serving provides at least what percentage of the Daily
Value?
A. 5%
B. 10%
,C. 20%
D. 50%
Correct Answer: B
Rationale: According to FDA labeling laws, a "good source" means the
food provides 10-19% of the Daily Value for that nutrient per serving.
"High" or "excellent" means 20% or more.
4. Which organ is the primary site for the absorption of most
nutrients?
A. Stomach
B. Large intestine
C. Small intestine
D. Liver
Correct Answer: C
Rationale: The small intestine, with its large surface area created by villi
and microvilli, is the main site for the absorption of nutrients into the
bloodstream.
5. An individual consumes a meal consisting of 20 grams of protein, 60
grams of carbohydrates, and 15 grams of fat. Approximately how
many total Calories did this meal provide?
A. 95 Calories
B. 380 Calories
C. 455 Calories
D. 560 Calories
Correct Answer: C
Rationale: Protein and carbohydrates provide 4 Calories per gram
(20g4=80, 60g4=240), and fat provides 9 Calories per gram (15g9=135).
Total = 80 + 240 + 135 = 455 Calories.*
,6. The Dietary Guidelines for Americans recommend that adults limit
their intake of added sugars to less than what percentage of total daily
Calories?
A. 10%
B. 15%
C. 25%
D. 35%
Correct Answer: A
Rationale: The 2020-2025 Dietary Guidelines recommend that added
sugars be limited to less than 10% of total daily calories to help reduce
the risk of chronic disease.
7. Which of the following is an example of a disaccharide?
A. Glucose
B. Fructose
C. Sucrose
D. Starch
Correct Answer: C
Rationale: Sucrose (table sugar) is a disaccharide composed of glucose
and fructose. Glucose and fructose are monosaccharides, and starch is a
complex carbohydrate (polysaccharide).
8. What is the primary role of bile in fat digestion?
A. To break down proteins into amino acids
B. To emulsify fats, breaking them into smaller droplets
C. To neutralize stomach acid
D. To absorb glucose into the bloodstream
Correct Answer: B
Rationale: Bile, produced by the liver and stored in the gallbladder, acts
as an emulsifier. It physically breaks down large fat globules into smaller
, droplets, increasing the surface area for digestive enzymes like lipase to
act upon.
9. A diet based on high-carbohydrate foods is more likely to be lower
in total calories than a diet based on high-fat foods.
A. True
B. False
Correct Answer: A (True)
Rationale: Carbohydrates contain 4 Calories per gram, while fat
contains 9 Calories per gram. Therefore, gram for gram, high-fat foods
are more calorie-dense.
10. Which of the following is the most common cause of chronic
disease?
A. A single, specific gene mutation
B. Poor diet and lifestyle factors
C. A viral infection
D. Environmental toxins alone
Correct Answer: B
Rationale: While genetics and environment play a role, poor diet,
physical inactivity, and other lifestyle factors are major contributors to
the development of chronic diseases like heart disease, type 2 diabetes,
and some cancers.
11. The term "gluconeogenesis" refers to the process of:
A. Breaking down glycogen to release glucose
B. Synthesizing new glucose from non-carbohydrate sources
C. Converting glucose to fat for storage
D. Storing glucose as glycogen in the liver
Correct Answer: B
CHAPTERS 1-4 WITH COMPLETE RATIONALES
1. Which of the following is considered a macronutrient?
A. Calcium
B. Vitamin C
C. Protein
D. Iron
Correct Answer: C
Rationale: Protein is a macronutrient, which are nutrients needed in
large amounts (gram quantities) daily. Calcium, Vitamin C, and Iron are
micronutrients, needed in smaller amounts.
2. What is the primary function of adipose tissue in the body?
A. To produce digestive enzymes
B. To store energy and provide insulation
C. To transport oxygen in the blood
D. To regulate blood glucose levels
Correct Answer: B
Rationale: Adipose tissue, or body fat, primarily stores excess energy in
the form of triglycerides and provides insulation and protection for
organs.
3. A food label claims a product is "a good source of calcium." This
means one serving provides at least what percentage of the Daily
Value?
A. 5%
B. 10%
,C. 20%
D. 50%
Correct Answer: B
Rationale: According to FDA labeling laws, a "good source" means the
food provides 10-19% of the Daily Value for that nutrient per serving.
"High" or "excellent" means 20% or more.
4. Which organ is the primary site for the absorption of most
nutrients?
A. Stomach
B. Large intestine
C. Small intestine
D. Liver
Correct Answer: C
Rationale: The small intestine, with its large surface area created by villi
and microvilli, is the main site for the absorption of nutrients into the
bloodstream.
5. An individual consumes a meal consisting of 20 grams of protein, 60
grams of carbohydrates, and 15 grams of fat. Approximately how
many total Calories did this meal provide?
A. 95 Calories
B. 380 Calories
C. 455 Calories
D. 560 Calories
Correct Answer: C
Rationale: Protein and carbohydrates provide 4 Calories per gram
(20g4=80, 60g4=240), and fat provides 9 Calories per gram (15g9=135).
Total = 80 + 240 + 135 = 455 Calories.*
,6. The Dietary Guidelines for Americans recommend that adults limit
their intake of added sugars to less than what percentage of total daily
Calories?
A. 10%
B. 15%
C. 25%
D. 35%
Correct Answer: A
Rationale: The 2020-2025 Dietary Guidelines recommend that added
sugars be limited to less than 10% of total daily calories to help reduce
the risk of chronic disease.
7. Which of the following is an example of a disaccharide?
A. Glucose
B. Fructose
C. Sucrose
D. Starch
Correct Answer: C
Rationale: Sucrose (table sugar) is a disaccharide composed of glucose
and fructose. Glucose and fructose are monosaccharides, and starch is a
complex carbohydrate (polysaccharide).
8. What is the primary role of bile in fat digestion?
A. To break down proteins into amino acids
B. To emulsify fats, breaking them into smaller droplets
C. To neutralize stomach acid
D. To absorb glucose into the bloodstream
Correct Answer: B
Rationale: Bile, produced by the liver and stored in the gallbladder, acts
as an emulsifier. It physically breaks down large fat globules into smaller
, droplets, increasing the surface area for digestive enzymes like lipase to
act upon.
9. A diet based on high-carbohydrate foods is more likely to be lower
in total calories than a diet based on high-fat foods.
A. True
B. False
Correct Answer: A (True)
Rationale: Carbohydrates contain 4 Calories per gram, while fat
contains 9 Calories per gram. Therefore, gram for gram, high-fat foods
are more calorie-dense.
10. Which of the following is the most common cause of chronic
disease?
A. A single, specific gene mutation
B. Poor diet and lifestyle factors
C. A viral infection
D. Environmental toxins alone
Correct Answer: B
Rationale: While genetics and environment play a role, poor diet,
physical inactivity, and other lifestyle factors are major contributors to
the development of chronic diseases like heart disease, type 2 diabetes,
and some cancers.
11. The term "gluconeogenesis" refers to the process of:
A. Breaking down glycogen to release glucose
B. Synthesizing new glucose from non-carbohydrate sources
C. Converting glucose to fat for storage
D. Storing glucose as glycogen in the liver
Correct Answer: B
