Biochemistry Module 4 Exam | Portage Learning Questions and Verified Answers | 100% Guarantee Pass 2026/2027
OBJECTIVE ASSESSMENT - EXAM
Biochemistry Module 4 Exam | Portage Learning Questions
and Verified Answers | 100% Guarantee Pass 2026/2027
50 100%
QUESTIONS VERIFIED ANSWERS EDITION
TOPICS COVERED
Carbohydrate Metabolism Pentose Phosphate Pathway
Glycolysis & Gluconeogenesis Regulation of Carbohydrate Metabolism
Glycogen Metabolism Integration & Hormonal Control
COVER PAGE - 1
,SECTION 1 | CARBOHYDRATE METABOLISM OVERVIEW | Q1-Q10 | Biochemistry Module 4 Exam | Portage Learning Questions and Verified Answers | 100% Guarantee Pass 2026/2027 2026/2027
Q1 Question 1 of 50
A biochemistry student is asked to classify glucose based on the position of its carbonyl carbon and the
number of carbon atoms. Glucose has six carbons with an aldehyde group at C-1. Which classification
correctly describes glucose?
A. Aldohexose
B. Ketopentose
C. Ketohexose
D. Aldopentose
Correct Answer: A
Rationale:
Glucose has six carbon atoms and an aldehyde group at C-1, making it an aldohexose. The 'aldo' refers to
the aldehyde, and 'hexose' refers to the six carbons in the chain.
Q2 Question 2 of 50
A researcher examines the cyclic form of glucose in aqueous solution and finds that the hydroxyl group
on the anomeric carbon (C-1) points downward in the Haworth projection. Which designation describes
this stereoisomer?
A. Beta-D-glucose
B. L-glucose
C. Alpha-D-glucose
D. Open-chain glucose
Correct Answer: C
Rationale:
When the hydroxyl group on the anomeric carbon (C-1) is pointing downward in a Haworth projection of
D-glucose, it is the alpha anomer. In beta-D-glucose, the C-1 hydroxyl points upward.
Biochemistry Module 4 Exam | Portage Learning Questions and Verified Answers | 100% Guarantee Pass 2026/2027 - 2026/2027 | Passing Score: 80% | Page 2 of 23
, SECTION 1 | CARBOHYDRATE METABOLISM OVERVIEW | Q1-Q10 | Biochemistry Module 4 Exam | Portage Learning Questions and Verified Answers | 100% Guarantee Pass 2026/2027 2026/2027
Q3 Question 3 of 50
A laboratory technician tests for reducing sugars by adding Benedict reagent to a sample and observes
a brick-red precipitate after heating. Which structural feature of the sugar allows this reaction to occur?
A. Presence of a glycosidic bond between two sugars
B. A branched polymer of glucose units
C. A phosphate group attached at C-6
D. Free anomeric carbon capable of opening to an aldehyde
Correct Answer: D
Rationale:
Reducing sugars contain a free anomeric carbon that can open to expose an aldehyde group, which reduces
Benedict reagent to produce a colored precipitate. Nonreducing sugars have their anomeric carbons locked
in glycosidic bonds.
Q4 Question 4 of 50
A patient with lactose intolerance lacks the enzyme lactase in the small intestine. Which bond in lactose
is normally hydrolyzed by lactase, and what are the two monosaccharide products?
A. Alpha-1,4 glycosidic bond releasing glucose and glucose
B. Alpha-1,6 glycosidic bond releasing glucose and fructose
C. Beta-1,4 glycosidic bond releasing glucose and fructose
D. Beta-1,4 glycosidic bond releasing glucose and galactose
Correct Answer: D
Rationale:
Lactose is a disaccharide of glucose linked beta-1,4 to galactose. Lactase hydrolyzes this bond, releasing
the two monosaccharides for absorption. Without lactase, lactose ferments in the colon causing symptoms.
Biochemistry Module 4 Exam | Portage Learning Questions and Verified Answers | 100% Guarantee Pass 2026/2027 - 2026/2027 | Passing Score: 80% | Page 3 of 23
OBJECTIVE ASSESSMENT - EXAM
Biochemistry Module 4 Exam | Portage Learning Questions
and Verified Answers | 100% Guarantee Pass 2026/2027
50 100%
QUESTIONS VERIFIED ANSWERS EDITION
TOPICS COVERED
Carbohydrate Metabolism Pentose Phosphate Pathway
Glycolysis & Gluconeogenesis Regulation of Carbohydrate Metabolism
Glycogen Metabolism Integration & Hormonal Control
COVER PAGE - 1
,SECTION 1 | CARBOHYDRATE METABOLISM OVERVIEW | Q1-Q10 | Biochemistry Module 4 Exam | Portage Learning Questions and Verified Answers | 100% Guarantee Pass 2026/2027 2026/2027
Q1 Question 1 of 50
A biochemistry student is asked to classify glucose based on the position of its carbonyl carbon and the
number of carbon atoms. Glucose has six carbons with an aldehyde group at C-1. Which classification
correctly describes glucose?
A. Aldohexose
B. Ketopentose
C. Ketohexose
D. Aldopentose
Correct Answer: A
Rationale:
Glucose has six carbon atoms and an aldehyde group at C-1, making it an aldohexose. The 'aldo' refers to
the aldehyde, and 'hexose' refers to the six carbons in the chain.
Q2 Question 2 of 50
A researcher examines the cyclic form of glucose in aqueous solution and finds that the hydroxyl group
on the anomeric carbon (C-1) points downward in the Haworth projection. Which designation describes
this stereoisomer?
A. Beta-D-glucose
B. L-glucose
C. Alpha-D-glucose
D. Open-chain glucose
Correct Answer: C
Rationale:
When the hydroxyl group on the anomeric carbon (C-1) is pointing downward in a Haworth projection of
D-glucose, it is the alpha anomer. In beta-D-glucose, the C-1 hydroxyl points upward.
Biochemistry Module 4 Exam | Portage Learning Questions and Verified Answers | 100% Guarantee Pass 2026/2027 - 2026/2027 | Passing Score: 80% | Page 2 of 23
, SECTION 1 | CARBOHYDRATE METABOLISM OVERVIEW | Q1-Q10 | Biochemistry Module 4 Exam | Portage Learning Questions and Verified Answers | 100% Guarantee Pass 2026/2027 2026/2027
Q3 Question 3 of 50
A laboratory technician tests for reducing sugars by adding Benedict reagent to a sample and observes
a brick-red precipitate after heating. Which structural feature of the sugar allows this reaction to occur?
A. Presence of a glycosidic bond between two sugars
B. A branched polymer of glucose units
C. A phosphate group attached at C-6
D. Free anomeric carbon capable of opening to an aldehyde
Correct Answer: D
Rationale:
Reducing sugars contain a free anomeric carbon that can open to expose an aldehyde group, which reduces
Benedict reagent to produce a colored precipitate. Nonreducing sugars have their anomeric carbons locked
in glycosidic bonds.
Q4 Question 4 of 50
A patient with lactose intolerance lacks the enzyme lactase in the small intestine. Which bond in lactose
is normally hydrolyzed by lactase, and what are the two monosaccharide products?
A. Alpha-1,4 glycosidic bond releasing glucose and glucose
B. Alpha-1,6 glycosidic bond releasing glucose and fructose
C. Beta-1,4 glycosidic bond releasing glucose and fructose
D. Beta-1,4 glycosidic bond releasing glucose and galactose
Correct Answer: D
Rationale:
Lactose is a disaccharide of glucose linked beta-1,4 to galactose. Lactase hydrolyzes this bond, releasing
the two monosaccharides for absorption. Without lactase, lactose ferments in the colon causing symptoms.
Biochemistry Module 4 Exam | Portage Learning Questions and Verified Answers | 100% Guarantee Pass 2026/2027 - 2026/2027 | Passing Score: 80% | Page 3 of 23
