50
QS
P O R TA G E L E A R N I N G / G E N E VA C O L L E G E
CHEM 210
Biochemistry Module 4
A comprehensive examination covering carbohydrate
chemistry: structure, classification, monosaccharide
stereochemistry, cyclic sugar forms, glycosidic bonds,
polysaccharide structure-function relationships, and
integrated biochemical reasoning scenarios.
ACADEMIC YEAR
2026-2027
E X A M I N AT I O N C O N T E N T
Carbohydrate Chemistry: Structure, Function & Metabolism
F O R M AT
50 Multiple-Choice Questions with Detailed Rationales
CURRICULUM ALIGNED • A+ VERIFIED CONTENT •
C O M P R E H E N S I V E R AT I O N A L E S
,CHEM 210 Biochemistry | Module 4 Exam | 2026/2027 | Portage Learning / Geneva College
CHEM 210 Biochemistry
Module 4 Examination
Portage Learning / Geneva College | 2026-2027 Academic Year
Carbohydrate Chemistry: Structure, Function, and Metabolism
Total Questions: 50 (Multiple Choice) Cognitive Levels: 30% Recall / 50% Application / 20% Analysis
Time Allotted: 90 Minutes Question Style: 70% Scenario / 20% Direct / 10% Structural
EXAMINATION INSTRUCTIONS:
1. Select the single best answer (A, B, C, or D) for each question.
2. Each question is worth equal points; there is no penalty for guessing.
3. A detailed rationale accompanies each answer for study and review purposes.
4. This exam covers carbohydrate fundamentals, monosaccharide structure, cyclic sugar forms, glycosidic bonds, polysaccharides,
and integrated scenarios.
Section 1: Carbohydrate Fundamentals (Definitions, Functions, and Classification)
Questions 1-10 assess foundational knowledge of carbohydrate definitions, elemental composition, biological functions, classification
schemes, and the distinction between aldoses and ketoses.
Q1: Which of the following best describes the general molecular formula of a carbohydrate?
A. (CH2O)n, with a C:H:O ratio of 1:2:1 **[CORRECT]**
B. CnH2n+2On, with a C:H:O ratio of 1:3:1
C. CnHnOn, with a C:H:O ratio of 1:1:1
D. CnH2n-1On, with a C:H:O ratio of 2:1:1
Correct Answer: A
Rationale: Carbohydrates follow the empirical formula (CH2O)n, also expressed as CnH2nOn, which yields a
carbon-to-hydrogen-to-oxygen ratio of exactly 1:2:1. This ratio is the defining stoichiometric feature of carbohydrates.
Options B, C, and D present incorrect formulas or ratios that do not match the classical carbohydrate definition
established in biochemistry.
Page 1
, CHEM 210 Biochemistry | Module 4 Exam | 2026/2027 | Portage Learning / Geneva College
Q2: The term 'saccharide,' used to classify carbohydrates, is derived from a Greek word meaning what?
A. sweet
B. sugar **[CORRECT]**
C. energy
D. carbon chain
Correct Answer: B
Rationale: The word 'saccharide' comes from the Greek 'sakkharon,' which translates to 'sugar.' While many sugars do
taste sweet, the etymological root specifically means 'sugar,' not 'sweet.' This distinction is important because not all
saccharides are perceptibly sweet (e.g., cellulose and chitin are saccharides that lack sweetness), yet they are all classified
under the sugar family by their chemical structure.
Q3: What is the most common monosaccharide found in nature, and what alternative name is frequently used
for it?
A. Fructose, also called levulose
B. Galactose, also called cerebrose
C. Glucose, also called dextrose **[CORRECT]**
D. Ribose, also called pentose
Correct Answer: C
Rationale: Glucose is the most abundant monosaccharide in nature and serves as the primary metabolic fuel for cells. It is
commonly called 'dextrose' because the naturally occurring form is D-glucose, which exhibits dextrorotation (rotation of
plane-polarized light to the right). Fructose is known as levulose (left-rotating), and galactose and ribose have different
common names, making them incorrect choices.
Q4: Which set of elements is represented by the acronym CHOPS, denoting the most biologically important
elements in biomolecules?
A. Carbon, Hydrogen, Oxygen, Phosphorus, Sulfur **[CORRECT]**
B. Carbon, Hydrogen, Oxygen, Platinum, Silicon
C. Chlorine, Hydrogen, Oxygen, Phosphorus, Sulfur
D. Carbon, Helium, Oxygen, Phosphorus, Sodium
Correct Answer: A
Rationale: CHOPS stands for Carbon, Hydrogen, Oxygen, Phosphorus, and Sulfur. These five elements constitute the
backbone of virtually all biological macromolecules: C, H, and O form carbohydrates, lipids, and nucleic acid sugars; P is
essential for nucleic acid backbones (phosphodiester bonds) and ATP; and S is found in the amino acids cysteine and
methionine. The other options substitute incorrect elements such as platinum, helium, chlorine, or sodium.
Page 2
QS
P O R TA G E L E A R N I N G / G E N E VA C O L L E G E
CHEM 210
Biochemistry Module 4
A comprehensive examination covering carbohydrate
chemistry: structure, classification, monosaccharide
stereochemistry, cyclic sugar forms, glycosidic bonds,
polysaccharide structure-function relationships, and
integrated biochemical reasoning scenarios.
ACADEMIC YEAR
2026-2027
E X A M I N AT I O N C O N T E N T
Carbohydrate Chemistry: Structure, Function & Metabolism
F O R M AT
50 Multiple-Choice Questions with Detailed Rationales
CURRICULUM ALIGNED • A+ VERIFIED CONTENT •
C O M P R E H E N S I V E R AT I O N A L E S
,CHEM 210 Biochemistry | Module 4 Exam | 2026/2027 | Portage Learning / Geneva College
CHEM 210 Biochemistry
Module 4 Examination
Portage Learning / Geneva College | 2026-2027 Academic Year
Carbohydrate Chemistry: Structure, Function, and Metabolism
Total Questions: 50 (Multiple Choice) Cognitive Levels: 30% Recall / 50% Application / 20% Analysis
Time Allotted: 90 Minutes Question Style: 70% Scenario / 20% Direct / 10% Structural
EXAMINATION INSTRUCTIONS:
1. Select the single best answer (A, B, C, or D) for each question.
2. Each question is worth equal points; there is no penalty for guessing.
3. A detailed rationale accompanies each answer for study and review purposes.
4. This exam covers carbohydrate fundamentals, monosaccharide structure, cyclic sugar forms, glycosidic bonds, polysaccharides,
and integrated scenarios.
Section 1: Carbohydrate Fundamentals (Definitions, Functions, and Classification)
Questions 1-10 assess foundational knowledge of carbohydrate definitions, elemental composition, biological functions, classification
schemes, and the distinction between aldoses and ketoses.
Q1: Which of the following best describes the general molecular formula of a carbohydrate?
A. (CH2O)n, with a C:H:O ratio of 1:2:1 **[CORRECT]**
B. CnH2n+2On, with a C:H:O ratio of 1:3:1
C. CnHnOn, with a C:H:O ratio of 1:1:1
D. CnH2n-1On, with a C:H:O ratio of 2:1:1
Correct Answer: A
Rationale: Carbohydrates follow the empirical formula (CH2O)n, also expressed as CnH2nOn, which yields a
carbon-to-hydrogen-to-oxygen ratio of exactly 1:2:1. This ratio is the defining stoichiometric feature of carbohydrates.
Options B, C, and D present incorrect formulas or ratios that do not match the classical carbohydrate definition
established in biochemistry.
Page 1
, CHEM 210 Biochemistry | Module 4 Exam | 2026/2027 | Portage Learning / Geneva College
Q2: The term 'saccharide,' used to classify carbohydrates, is derived from a Greek word meaning what?
A. sweet
B. sugar **[CORRECT]**
C. energy
D. carbon chain
Correct Answer: B
Rationale: The word 'saccharide' comes from the Greek 'sakkharon,' which translates to 'sugar.' While many sugars do
taste sweet, the etymological root specifically means 'sugar,' not 'sweet.' This distinction is important because not all
saccharides are perceptibly sweet (e.g., cellulose and chitin are saccharides that lack sweetness), yet they are all classified
under the sugar family by their chemical structure.
Q3: What is the most common monosaccharide found in nature, and what alternative name is frequently used
for it?
A. Fructose, also called levulose
B. Galactose, also called cerebrose
C. Glucose, also called dextrose **[CORRECT]**
D. Ribose, also called pentose
Correct Answer: C
Rationale: Glucose is the most abundant monosaccharide in nature and serves as the primary metabolic fuel for cells. It is
commonly called 'dextrose' because the naturally occurring form is D-glucose, which exhibits dextrorotation (rotation of
plane-polarized light to the right). Fructose is known as levulose (left-rotating), and galactose and ribose have different
common names, making them incorrect choices.
Q4: Which set of elements is represented by the acronym CHOPS, denoting the most biologically important
elements in biomolecules?
A. Carbon, Hydrogen, Oxygen, Phosphorus, Sulfur **[CORRECT]**
B. Carbon, Hydrogen, Oxygen, Platinum, Silicon
C. Chlorine, Hydrogen, Oxygen, Phosphorus, Sulfur
D. Carbon, Helium, Oxygen, Phosphorus, Sodium
Correct Answer: A
Rationale: CHOPS stands for Carbon, Hydrogen, Oxygen, Phosphorus, and Sulfur. These five elements constitute the
backbone of virtually all biological macromolecules: C, H, and O form carbohydrates, lipids, and nucleic acid sugars; P is
essential for nucleic acid backbones (phosphodiester bonds) and ATP; and S is found in the amino acids cysteine and
methionine. The other options substitute incorrect elements such as platinum, helium, chlorine, or sodium.
Page 2
