Portage Learning BIOD 101 Module 3 | Questions and Answers Rated A+ 2026/2027
OBJECTIVE ASSESSMENT - EXAM
Portage Learning BIOD 101 Module 3 | Questions and
Answers Rated A+ 2026/2027
50 100% 2026/2027
QUESTIONS VERIFIED ANSWERS EDITION
TOPICS COVERED
Biological Molecules Metabolism & Enzymes
Cell Structure & Function Biological Membranes
Cellular Respiration Cell Transport Mechanisms
COVER PAGE - 1
,SECTION 1 | Biological Molecules | Q1-Q10 | Portage Learning BIOD 101 Module 3 | Questions and Answers Rated A+
2026/2027 2026/2027
Q1 Question 1 of 50
Q1. A biochemistry student is analyzing the carbohydrate composition of an energy drink and
identifies a six-carbon sugar with the formula C6H12O6 that serves as the primary energy source for
cells. Which molecule is the student most likely examining?
A. Sucrose, a disaccharide composed of glucose and fructose
B. Lactose, a disaccharide composed of glucose and galactose
C. Glucose, a monosaccharide used directly in cellular respiration
D. Glycogen, a polysaccharide stored in the liver
Correct Answer: C
Rationale:
Glucose is a six-carbon monosaccharide with the formula C6H12O6 and is the primary substrate for cellular
respiration. Choices A and C are disaccharides, not monosaccharides. Choice D is a polysaccharide storage
form, not the direct energy source.
Q2 Question 2 of 50
Q2. A molecular biology researcher is studying protein synthesis in a cell-free system and observes
the formation of a covalent bond between the carboxyl group of one amino acid and the amino group
of another. Which type of bond is being formed?
A. Hydrogen bond
B. Peptide bond
C. Ionic bond
D. Phosphodiester bond
Correct Answer: B
Rationale:
A peptide bond is the covalent bond formed between the carboxyl group of one amino acid and the amino
group of another, with the release of water. Choice A is a weak bond between polar molecules. Choice B is
between ions. Choice D links nucleotides, not amino acids.
Portage Learning BIOD 101 Module 3 | Questions and Answers Rated A+ 2026/2027 - 2026/2027 | Passing Score: 80% | Page 2 of 27
, Q3 Question 3 of 50
Q3. A nutritionist is counseling a patient about dietary fats and explains that one class of lipids is
particularly important for hormone synthesis and membrane fluidity. Which type of lipid serves as a
precursor for steroid hormones such as testosterone and estrogen?
A. Cholesterol
B. Triglycerides
C. Phospholipids
D. Waxes
Correct Answer: A
Rationale:
Cholesterol is a sterol lipid that serves as the precursor for steroid hormones such as testosterone, estrogen,
and cortisol, and is also a component of cell membranes. Choice A is a membrane component but not a
hormone precursor. Choice B is for energy storage. Choice D is a protective lipid, not a hormone precursor.
Q4 Question 4 of 50
Q4. A patient with cardiovascular concerns is reviewing dietary fat intake with a registered dietitian.
The dietitian explains the structural difference between saturated and unsaturated fatty acids. Which
structural feature distinguishes an unsaturated fatty acid from a saturated one?
A. Presence of an amine group
B. Presence of a glycerol backbone
C. Absence of any carbon atoms
D. Presence of one or more carbon-carbon double bonds
Correct Answer: D
Rationale:
Unsaturated fatty acids contain one or more carbon-carbon double bonds, which create kinks in the chain
and lower the melting point, while saturated fatty acids have only single bonds. Choice B is common to both.
Choice C is incorrect because both contain carbon. Choice D is found in amino acids, not fatty acids.
Portage Learning BIOD 101 Module 3 | Questions and Answers Rated A+ 2026/2027 - 2026/2027 | Passing Score: 80% | Page 3 of 27
OBJECTIVE ASSESSMENT - EXAM
Portage Learning BIOD 101 Module 3 | Questions and
Answers Rated A+ 2026/2027
50 100% 2026/2027
QUESTIONS VERIFIED ANSWERS EDITION
TOPICS COVERED
Biological Molecules Metabolism & Enzymes
Cell Structure & Function Biological Membranes
Cellular Respiration Cell Transport Mechanisms
COVER PAGE - 1
,SECTION 1 | Biological Molecules | Q1-Q10 | Portage Learning BIOD 101 Module 3 | Questions and Answers Rated A+
2026/2027 2026/2027
Q1 Question 1 of 50
Q1. A biochemistry student is analyzing the carbohydrate composition of an energy drink and
identifies a six-carbon sugar with the formula C6H12O6 that serves as the primary energy source for
cells. Which molecule is the student most likely examining?
A. Sucrose, a disaccharide composed of glucose and fructose
B. Lactose, a disaccharide composed of glucose and galactose
C. Glucose, a monosaccharide used directly in cellular respiration
D. Glycogen, a polysaccharide stored in the liver
Correct Answer: C
Rationale:
Glucose is a six-carbon monosaccharide with the formula C6H12O6 and is the primary substrate for cellular
respiration. Choices A and C are disaccharides, not monosaccharides. Choice D is a polysaccharide storage
form, not the direct energy source.
Q2 Question 2 of 50
Q2. A molecular biology researcher is studying protein synthesis in a cell-free system and observes
the formation of a covalent bond between the carboxyl group of one amino acid and the amino group
of another. Which type of bond is being formed?
A. Hydrogen bond
B. Peptide bond
C. Ionic bond
D. Phosphodiester bond
Correct Answer: B
Rationale:
A peptide bond is the covalent bond formed between the carboxyl group of one amino acid and the amino
group of another, with the release of water. Choice A is a weak bond between polar molecules. Choice B is
between ions. Choice D links nucleotides, not amino acids.
Portage Learning BIOD 101 Module 3 | Questions and Answers Rated A+ 2026/2027 - 2026/2027 | Passing Score: 80% | Page 2 of 27
, Q3 Question 3 of 50
Q3. A nutritionist is counseling a patient about dietary fats and explains that one class of lipids is
particularly important for hormone synthesis and membrane fluidity. Which type of lipid serves as a
precursor for steroid hormones such as testosterone and estrogen?
A. Cholesterol
B. Triglycerides
C. Phospholipids
D. Waxes
Correct Answer: A
Rationale:
Cholesterol is a sterol lipid that serves as the precursor for steroid hormones such as testosterone, estrogen,
and cortisol, and is also a component of cell membranes. Choice A is a membrane component but not a
hormone precursor. Choice B is for energy storage. Choice D is a protective lipid, not a hormone precursor.
Q4 Question 4 of 50
Q4. A patient with cardiovascular concerns is reviewing dietary fat intake with a registered dietitian.
The dietitian explains the structural difference between saturated and unsaturated fatty acids. Which
structural feature distinguishes an unsaturated fatty acid from a saturated one?
A. Presence of an amine group
B. Presence of a glycerol backbone
C. Absence of any carbon atoms
D. Presence of one or more carbon-carbon double bonds
Correct Answer: D
Rationale:
Unsaturated fatty acids contain one or more carbon-carbon double bonds, which create kinks in the chain
and lower the melting point, while saturated fatty acids have only single bonds. Choice B is common to both.
Choice C is incorrect because both contain carbon. Choice D is found in amino acids, not fatty acids.
Portage Learning BIOD 101 Module 3 | Questions and Answers Rated A+ 2026/2027 - 2026/2027 | Passing Score: 80% | Page 3 of 27
