BIOD 121 Essentials in Nutrition Module 1
Exam 2026/2027 (Portage Learning) | 100%
Verified Questions & Answers |
Comprehensive Study Guide, Practice Exam
& Nutrition Review
BIOD 121 ESSENTIALS IN NUTRITION MODULE 1 EXAM 2026/2027 (PORTAGE
LEARNING) 100% Verified Questions & Answers | Comprehensive Study Guide
DOCUMENT OVERVIEW
• This comprehensive study guide contains 200 practice examination questions
designed to test your mastery of foundational nutrition concepts, metabolic
processes, and dietary requirements across all Module 1 topics
• Use this material to identify knowledge gaps through active practice, reinforce key
concepts with detailed rationales, and build confidence for your actual exam
through repeated engagement with authentic question formats
1. Which of the following macronutrients provides the most energy per gram?
A) Carbohydrates
B) Proteins
C) Fats
D) Fiber
E) Water
CORRECT ANSWER: C) Fats
Fats provide 9 kilocalories per gram, which is more than double the energy
provided by carbohydrates and proteins, which each supply 4 kilocalories per gram.
Fiber and water provide no energy. Understanding caloric density is fundamental to
nutrition science and dietary planning, as fats are the most energy-dense
macronutrient available in the diet.
,2. The process by which food is broken down into smaller particles and
nutrients are released is called:
A) Absorption
B) Digestion
C) Metabolism
D) Excretion
E) Fermentation
CORRECT ANSWER: B) Digestion
Digestion is the mechanical and chemical breakdown of food into smaller particles
and absorbable nutrient components. This occurs throughout the gastrointestinal
tract, beginning in the mouth and continuing through the stomach and small
intestine. Absorption refers to the movement of nutrients into the bloodstream,
while metabolism involves the utilization of nutrients by the body's cells.
3. Which vitamin is synthesized by the body when skin is exposed to sunlight?
A) Vitamin A
B) Vitamin B12
C) Vitamin D
D) Vitamin E
E) Vitamin K
CORRECT ANSWER: C) Vitamin D
Vitamin D is synthesized in the skin when exposed to ultraviolet B (UVB) radiation
from sunlight. This endogenous synthesis is why vitamin D is classified as a
conditional nutrient—while it can be obtained from dietary sources and
supplements, the body can produce it independently. This is significant for bone
,health and calcium metabolism, as vitamin D is essential for calcium absorption in
the intestines.
4. The minimum level of a nutrient intake that meets the needs of 97-98% of
healthy individuals in a particular life stage and gender group is known as
the:
A) Adequate Intake (AI)
B) Recommended Dietary Allowance (RDA)
C) Estimated Average Requirement (EAR)
D) Tolerable Upper Intake Level (UL)
E) Daily Value (DV)
CORRECT ANSWER: B) Recommended Dietary Allowance (RDA)
The RDA is set at a level that meets the nutrient needs of 97-98% of healthy
individuals within a specific age and gender group. It is higher than the Estimated
Average Requirement (EAR) to account for individual variability. The RDA serves as
the standard recommendation for dietary nutrient intake and is used as the basis
for the Daily Value labeling on food packages in the United States.
5. Which organ is responsible for the majority of lipid digestion and
absorption?
A) Stomach
B) Liver
C) Small intestine
D) Pancreas
E) Mouth
CORRECT ANSWER: C) Small intestine
, The small intestine is the primary site of lipid digestion and absorption, with the
majority occurring in the jejunum and ileum. While the stomach secretes gastric
lipase and the pancreas secretes pancreatic lipase, the small intestine provides the
optimal environment for lipid digestion through the action of bile salts (from the
liver) and pancreatic lipase, along with the extensive mucosal surface for
absorption.
6. What is the primary function of carbohydrates in the human body?
A) Building and repairing tissues
B) Providing energy and regulating blood glucose
C) Insulating the body and storing long-term energy
D) Transporting fat-soluble vitamins
E) Forming the structure of cell membranes
CORRECT ANSWER: B) Providing energy and regulating blood glucose
Carbohydrates are the body's primary source of energy, as they are efficiently
converted to glucose, which fuels cellular respiration. Carbohydrates also play a
critical role in maintaining blood glucose homeostasis through glycemic regulation.
While proteins primarily build tissue, fats store long-term energy and provide
insulation, and specialized lipids form cell membranes, energy provision and blood
glucose regulation are the principal functions of carbohydrates.
7. The term "complete protein" refers to a protein source that contains:
A) All amino acids in equal proportions
B) All nine essential amino acids in adequate amounts
C) At least 20 grams of protein per serving
D) No plant-based protein sources
E) Protein that has not been processed or heated
Exam 2026/2027 (Portage Learning) | 100%
Verified Questions & Answers |
Comprehensive Study Guide, Practice Exam
& Nutrition Review
BIOD 121 ESSENTIALS IN NUTRITION MODULE 1 EXAM 2026/2027 (PORTAGE
LEARNING) 100% Verified Questions & Answers | Comprehensive Study Guide
DOCUMENT OVERVIEW
• This comprehensive study guide contains 200 practice examination questions
designed to test your mastery of foundational nutrition concepts, metabolic
processes, and dietary requirements across all Module 1 topics
• Use this material to identify knowledge gaps through active practice, reinforce key
concepts with detailed rationales, and build confidence for your actual exam
through repeated engagement with authentic question formats
1. Which of the following macronutrients provides the most energy per gram?
A) Carbohydrates
B) Proteins
C) Fats
D) Fiber
E) Water
CORRECT ANSWER: C) Fats
Fats provide 9 kilocalories per gram, which is more than double the energy
provided by carbohydrates and proteins, which each supply 4 kilocalories per gram.
Fiber and water provide no energy. Understanding caloric density is fundamental to
nutrition science and dietary planning, as fats are the most energy-dense
macronutrient available in the diet.
,2. The process by which food is broken down into smaller particles and
nutrients are released is called:
A) Absorption
B) Digestion
C) Metabolism
D) Excretion
E) Fermentation
CORRECT ANSWER: B) Digestion
Digestion is the mechanical and chemical breakdown of food into smaller particles
and absorbable nutrient components. This occurs throughout the gastrointestinal
tract, beginning in the mouth and continuing through the stomach and small
intestine. Absorption refers to the movement of nutrients into the bloodstream,
while metabolism involves the utilization of nutrients by the body's cells.
3. Which vitamin is synthesized by the body when skin is exposed to sunlight?
A) Vitamin A
B) Vitamin B12
C) Vitamin D
D) Vitamin E
E) Vitamin K
CORRECT ANSWER: C) Vitamin D
Vitamin D is synthesized in the skin when exposed to ultraviolet B (UVB) radiation
from sunlight. This endogenous synthesis is why vitamin D is classified as a
conditional nutrient—while it can be obtained from dietary sources and
supplements, the body can produce it independently. This is significant for bone
,health and calcium metabolism, as vitamin D is essential for calcium absorption in
the intestines.
4. The minimum level of a nutrient intake that meets the needs of 97-98% of
healthy individuals in a particular life stage and gender group is known as
the:
A) Adequate Intake (AI)
B) Recommended Dietary Allowance (RDA)
C) Estimated Average Requirement (EAR)
D) Tolerable Upper Intake Level (UL)
E) Daily Value (DV)
CORRECT ANSWER: B) Recommended Dietary Allowance (RDA)
The RDA is set at a level that meets the nutrient needs of 97-98% of healthy
individuals within a specific age and gender group. It is higher than the Estimated
Average Requirement (EAR) to account for individual variability. The RDA serves as
the standard recommendation for dietary nutrient intake and is used as the basis
for the Daily Value labeling on food packages in the United States.
5. Which organ is responsible for the majority of lipid digestion and
absorption?
A) Stomach
B) Liver
C) Small intestine
D) Pancreas
E) Mouth
CORRECT ANSWER: C) Small intestine
, The small intestine is the primary site of lipid digestion and absorption, with the
majority occurring in the jejunum and ileum. While the stomach secretes gastric
lipase and the pancreas secretes pancreatic lipase, the small intestine provides the
optimal environment for lipid digestion through the action of bile salts (from the
liver) and pancreatic lipase, along with the extensive mucosal surface for
absorption.
6. What is the primary function of carbohydrates in the human body?
A) Building and repairing tissues
B) Providing energy and regulating blood glucose
C) Insulating the body and storing long-term energy
D) Transporting fat-soluble vitamins
E) Forming the structure of cell membranes
CORRECT ANSWER: B) Providing energy and regulating blood glucose
Carbohydrates are the body's primary source of energy, as they are efficiently
converted to glucose, which fuels cellular respiration. Carbohydrates also play a
critical role in maintaining blood glucose homeostasis through glycemic regulation.
While proteins primarily build tissue, fats store long-term energy and provide
insulation, and specialized lipids form cell membranes, energy provision and blood
glucose regulation are the principal functions of carbohydrates.
7. The term "complete protein" refers to a protein source that contains:
A) All amino acids in equal proportions
B) All nine essential amino acids in adequate amounts
C) At least 20 grams of protein per serving
D) No plant-based protein sources
E) Protein that has not been processed or heated
