,26/27 BIOL 121/BIOD 121 Final MODULE EXAM |
NUTRITION -PORTAGE | Q&A + DETAILED
RATIONALES
1. A food provides 18 g carbohydrate, 5 g protein, and 7 g fat. Approximately how much
energy does it provide?
A) 135 kcal
B) 155 kcal
C) 175 kcal
D) 205 kcal
Correct Answer: 155 kcal
Rationale: Carbohydrate and protein each provide approximately 4 kcal/g, while fat
provides approximately 9 kcal/g. The calculation is (18 × 4) + (5 × 4) + (7 × 9) = 72 + 20 +
63 = 155 kcal. This calculation distinguishes energy-yielding macronutrients from vitamins,
minerals, and water, which do not provide calories.
2. Hunger differs most fundamentally from appetite because hunger:
A) is primarily a physiological drive associated with the need for food
B) always involves craving one specific food
C) is determined exclusively by culture
D) occurs only when blood glucose reaches zero
Correct Answer: is primarily a physiological drive associated with the need for food
Rationale: Hunger refers primarily to internal physiological signals promoting food intake,
whereas appetite includes the psychological or external desire to eat and can occur without
physiological hunger. Sight, smell, social setting, learned preferences, emotions, and food
availability can influence appetite.
3. Vitamins are classified as:
A) energy-yielding macronutrients
B) inorganic macronutrients
C) organic micronutrients
D) inorganic energy nutrients
Correct Answer: organic micronutrients
Rationale: Vitamins are organic compounds required in relatively small amounts to
support physiological processes. They are micronutrients because requirements are small
compared with carbohydrate, protein, fat, and water. Minerals are also micronutrients but
are inorganic.
,4. Which statement best illustrates nutrient density?
A) A food contains a large volume of water
B) A food has the highest possible calorie content
C) A serving weighs more than competing foods
D) A food supplies substantial beneficial nutrients relative to its calorie content
Correct Answer: A food supplies substantial beneficial nutrients relative to its calorie
content
Rationale: Nutrient density compares the nutritional value of a food with the energy it
supplies. Vegetables, fruits, whole grains, legumes, lean protein foods, and appropriate
dairy or fortified alternatives can provide vitamins, minerals, protein, fiber, or other
beneficial components without disproportionately high energy intake.
5. A nutrition claim is supported by one small observational study but contradicts
numerous well-designed controlled trials and systematic reviews. The strongest
scientific response is to:
A) accept the newest study automatically
B) evaluate the totality, quality, consistency, and limitations of the evidence
C) reject all nutrition research
D) accept whichever result is most popular online
Correct Answer: evaluate the totality, quality, consistency, and limitations of the evidence
Rationale: Scientific conclusions should not be based on a single study in isolation. Strong
evaluation considers study design, sample size, confounding, replication, consistency,
biological plausibility, and the broader evidence base. Systematic reviews and well-
conducted trials can provide stronger evidence for causal questions than isolated
observational findings.
6. Which characteristic most strongly suggests questionable nutrition information?
A) Discussion of uncertainty and limitations
B) Citation of peer-reviewed evidence
C) A guarantee that one product rapidly cures many unrelated diseases
D) Recommendations consistent with established evidence
Correct Answer: A guarantee that one product rapidly cures many unrelated diseases
Rationale: Claims of universal cures, guaranteed rapid results, secret remedies, or
products that supposedly solve many unrelated conditions are major misinformation
warning signs. Credible nutrition science acknowledges limitations and rarely supports
absolute guarantees.
7. A person consumes adequate calories but obtains most of them from foods with little
micronutrient value. Which conclusion is most appropriate?
A) Caloric adequacy does not guarantee nutrient adequacy
, B) Calories automatically prevent micronutrient deficiencies
C) Vitamins become unnecessary when energy intake is sufficient
D) Minerals are synthesized from excess calories
Correct Answer: Caloric adequacy does not guarantee nutrient adequacy
Rationale: Energy sufficiency and nutrient adequacy are different concepts. A diet can
supply adequate or excessive calories while remaining deficient in fiber, vitamins, minerals,
essential fatty acids, or other nutritional components. Dietary quality therefore matters
independently of total energy intake.
8. The primary site for absorption of most nutrients is the:
A) esophagus
B) stomach
C) small intestine
D) large intestine
Correct Answer: small intestine
Rationale: The small intestine is specialized for digestion and absorption through its
extensive surface area created by folds, villi, and microvilli. Although absorption occurs
elsewhere for certain substances, most macronutrient digestion products, vitamins, and
minerals are absorbed primarily in the small intestine.
9. Bile contributes to fat digestion principally by:
A) hydrolyzing peptide bonds
B) converting glucose to glycogen
C) emulsifying large fat droplets into smaller droplets
D) digesting starch into maltose
Correct Answer: emulsifying large fat droplets into smaller droplets
Rationale: Bile salts emulsify dietary fat, increasing the surface area available to pancreatic
lipase. Bile is not itself a digestive enzyme. Its physical action facilitates efficient enzymatic
digestion and subsequent formation of structures that assist lipid absorption.
10. A deficiency of pancreatic lipase would most directly impair digestion of:
A) minerals
B) triglycerides
C) amino acids
D) monosaccharides
Correct Answer: triglycerides
NUTRITION -PORTAGE | Q&A + DETAILED
RATIONALES
1. A food provides 18 g carbohydrate, 5 g protein, and 7 g fat. Approximately how much
energy does it provide?
A) 135 kcal
B) 155 kcal
C) 175 kcal
D) 205 kcal
Correct Answer: 155 kcal
Rationale: Carbohydrate and protein each provide approximately 4 kcal/g, while fat
provides approximately 9 kcal/g. The calculation is (18 × 4) + (5 × 4) + (7 × 9) = 72 + 20 +
63 = 155 kcal. This calculation distinguishes energy-yielding macronutrients from vitamins,
minerals, and water, which do not provide calories.
2. Hunger differs most fundamentally from appetite because hunger:
A) is primarily a physiological drive associated with the need for food
B) always involves craving one specific food
C) is determined exclusively by culture
D) occurs only when blood glucose reaches zero
Correct Answer: is primarily a physiological drive associated with the need for food
Rationale: Hunger refers primarily to internal physiological signals promoting food intake,
whereas appetite includes the psychological or external desire to eat and can occur without
physiological hunger. Sight, smell, social setting, learned preferences, emotions, and food
availability can influence appetite.
3. Vitamins are classified as:
A) energy-yielding macronutrients
B) inorganic macronutrients
C) organic micronutrients
D) inorganic energy nutrients
Correct Answer: organic micronutrients
Rationale: Vitamins are organic compounds required in relatively small amounts to
support physiological processes. They are micronutrients because requirements are small
compared with carbohydrate, protein, fat, and water. Minerals are also micronutrients but
are inorganic.
,4. Which statement best illustrates nutrient density?
A) A food contains a large volume of water
B) A food has the highest possible calorie content
C) A serving weighs more than competing foods
D) A food supplies substantial beneficial nutrients relative to its calorie content
Correct Answer: A food supplies substantial beneficial nutrients relative to its calorie
content
Rationale: Nutrient density compares the nutritional value of a food with the energy it
supplies. Vegetables, fruits, whole grains, legumes, lean protein foods, and appropriate
dairy or fortified alternatives can provide vitamins, minerals, protein, fiber, or other
beneficial components without disproportionately high energy intake.
5. A nutrition claim is supported by one small observational study but contradicts
numerous well-designed controlled trials and systematic reviews. The strongest
scientific response is to:
A) accept the newest study automatically
B) evaluate the totality, quality, consistency, and limitations of the evidence
C) reject all nutrition research
D) accept whichever result is most popular online
Correct Answer: evaluate the totality, quality, consistency, and limitations of the evidence
Rationale: Scientific conclusions should not be based on a single study in isolation. Strong
evaluation considers study design, sample size, confounding, replication, consistency,
biological plausibility, and the broader evidence base. Systematic reviews and well-
conducted trials can provide stronger evidence for causal questions than isolated
observational findings.
6. Which characteristic most strongly suggests questionable nutrition information?
A) Discussion of uncertainty and limitations
B) Citation of peer-reviewed evidence
C) A guarantee that one product rapidly cures many unrelated diseases
D) Recommendations consistent with established evidence
Correct Answer: A guarantee that one product rapidly cures many unrelated diseases
Rationale: Claims of universal cures, guaranteed rapid results, secret remedies, or
products that supposedly solve many unrelated conditions are major misinformation
warning signs. Credible nutrition science acknowledges limitations and rarely supports
absolute guarantees.
7. A person consumes adequate calories but obtains most of them from foods with little
micronutrient value. Which conclusion is most appropriate?
A) Caloric adequacy does not guarantee nutrient adequacy
, B) Calories automatically prevent micronutrient deficiencies
C) Vitamins become unnecessary when energy intake is sufficient
D) Minerals are synthesized from excess calories
Correct Answer: Caloric adequacy does not guarantee nutrient adequacy
Rationale: Energy sufficiency and nutrient adequacy are different concepts. A diet can
supply adequate or excessive calories while remaining deficient in fiber, vitamins, minerals,
essential fatty acids, or other nutritional components. Dietary quality therefore matters
independently of total energy intake.
8. The primary site for absorption of most nutrients is the:
A) esophagus
B) stomach
C) small intestine
D) large intestine
Correct Answer: small intestine
Rationale: The small intestine is specialized for digestion and absorption through its
extensive surface area created by folds, villi, and microvilli. Although absorption occurs
elsewhere for certain substances, most macronutrient digestion products, vitamins, and
minerals are absorbed primarily in the small intestine.
9. Bile contributes to fat digestion principally by:
A) hydrolyzing peptide bonds
B) converting glucose to glycogen
C) emulsifying large fat droplets into smaller droplets
D) digesting starch into maltose
Correct Answer: emulsifying large fat droplets into smaller droplets
Rationale: Bile salts emulsify dietary fat, increasing the surface area available to pancreatic
lipase. Bile is not itself a digestive enzyme. Its physical action facilitates efficient enzymatic
digestion and subsequent formation of structures that assist lipid absorption.
10. A deficiency of pancreatic lipase would most directly impair digestion of:
A) minerals
B) triglycerides
C) amino acids
D) monosaccharides
Correct Answer: triglycerides
