PORTAGE LEARNING
CHEM 210 – BIOCHEMISTRY
Module 4 Examination
(2026 Updated Version)
Questions with Verified, Fully Detailed Answers
Institution: Portage Learning
Course Code: CHEM 210
Course Title: Biochemistry
Module: Module 4
Assessment Type: Examination
Academic Year: 2026/2027
Edition: Updated Version
Student Name: _______________________________
Student ID: _________________________________
Instructor: _________________________________
Date: ______________________________________
Instructions to Candidates:
1. Answer all questions provided in this examination.
2. Read each question carefully before responding.
3. Show all relevant workings where applicable.
4. This document contains verified answers for academic study and revision.
5. Academic integrity is expected at all times.
Time Allowed: _____ Hours
Total Marks: _____
,Question 1.
Pts
Which Of The Following Monosaccharides Is Not An Aldose?
A. Erythrose
B. Dihydroxyacetone
C. Glucose
D. Glyceraldehyde
E. Ribose
ANS. B.
Aldoses Have An Aldehyde Group At The C1 Position.
Dihydroxyacetone Is A Ketose (Carbonyl Group At C2), So It Is Not An Aldose.
Question 2.
Pts
When Two Monosaccharides Are Epimers:
A. They Differ Only In The Configuration About The Penultimate Carbon
B. One Is An Aldose, The Other A Ketose
C. They Differ Only In The Configuration About One Carbon Atom
D. They Form O-Glycosidic Bonds
E. They Are Oligosaccharides
ANS. C.
Epimers Are Sugars That Differ Only At A Single Chiral Carbon (Not The Penultimate
Carbon Necessarily).
Example: D-Glucose And D-Mannose Differ Only At C2.
Question 3.
Pts
Which Pair Is Anomeric?
A. D-Glucose And D-Fructose
B. D-Glucose And L-Fructose
C. D-Glucose And L-Glucose
D. Α-D-Glucose And Β-D-Glucose
, E. Α-D-Glucose And Β-L-Glucose
ANS. D.
Anomers Are Isomers That Differ In Configuration At The Anomeric Carbon (C1 In
Glucose).
Α And Β Glucose Differ At The Orientation Of The Hydroxyl On C1.
Question 4.
Pts
Lactose Is Made From Linking Galactose And Glucose. When This Happens:
A. A Polysaccharide Is Formed
B. Gas Is Eliminated
C. An Epimer Is Formed
D. An Anomeric Carbon Is Formed On Carbon-1
E. Lactose Forms By A Condensation Reaction
ANS. D.
Lactose Is A Disaccharide Formed Via A Β-1→4 Glycosidic Bond.
The Linkage Involves The Anomeric Carbon Of Galactose (C1).
Question 5.
Pts
Chitin And Cellulose Are Both Polymers Of:
A. Α-D-Glucose
B. Galactose
C. Β-D-Glucose
D. Idose
E. Maltose
ANS. C.
Both Cellulose And Chitin Are Composed Of Β-1→4 Linked Glucose (Or N-
Acetylglucosamine In Chitin).
CHEM 210 – BIOCHEMISTRY
Module 4 Examination
(2026 Updated Version)
Questions with Verified, Fully Detailed Answers
Institution: Portage Learning
Course Code: CHEM 210
Course Title: Biochemistry
Module: Module 4
Assessment Type: Examination
Academic Year: 2026/2027
Edition: Updated Version
Student Name: _______________________________
Student ID: _________________________________
Instructor: _________________________________
Date: ______________________________________
Instructions to Candidates:
1. Answer all questions provided in this examination.
2. Read each question carefully before responding.
3. Show all relevant workings where applicable.
4. This document contains verified answers for academic study and revision.
5. Academic integrity is expected at all times.
Time Allowed: _____ Hours
Total Marks: _____
,Question 1.
Pts
Which Of The Following Monosaccharides Is Not An Aldose?
A. Erythrose
B. Dihydroxyacetone
C. Glucose
D. Glyceraldehyde
E. Ribose
ANS. B.
Aldoses Have An Aldehyde Group At The C1 Position.
Dihydroxyacetone Is A Ketose (Carbonyl Group At C2), So It Is Not An Aldose.
Question 2.
Pts
When Two Monosaccharides Are Epimers:
A. They Differ Only In The Configuration About The Penultimate Carbon
B. One Is An Aldose, The Other A Ketose
C. They Differ Only In The Configuration About One Carbon Atom
D. They Form O-Glycosidic Bonds
E. They Are Oligosaccharides
ANS. C.
Epimers Are Sugars That Differ Only At A Single Chiral Carbon (Not The Penultimate
Carbon Necessarily).
Example: D-Glucose And D-Mannose Differ Only At C2.
Question 3.
Pts
Which Pair Is Anomeric?
A. D-Glucose And D-Fructose
B. D-Glucose And L-Fructose
C. D-Glucose And L-Glucose
D. Α-D-Glucose And Β-D-Glucose
, E. Α-D-Glucose And Β-L-Glucose
ANS. D.
Anomers Are Isomers That Differ In Configuration At The Anomeric Carbon (C1 In
Glucose).
Α And Β Glucose Differ At The Orientation Of The Hydroxyl On C1.
Question 4.
Pts
Lactose Is Made From Linking Galactose And Glucose. When This Happens:
A. A Polysaccharide Is Formed
B. Gas Is Eliminated
C. An Epimer Is Formed
D. An Anomeric Carbon Is Formed On Carbon-1
E. Lactose Forms By A Condensation Reaction
ANS. D.
Lactose Is A Disaccharide Formed Via A Β-1→4 Glycosidic Bond.
The Linkage Involves The Anomeric Carbon Of Galactose (C1).
Question 5.
Pts
Chitin And Cellulose Are Both Polymers Of:
A. Α-D-Glucose
B. Galactose
C. Β-D-Glucose
D. Idose
E. Maltose
ANS. C.
Both Cellulose And Chitin Are Composed Of Β-1→4 Linked Glucose (Or N-
Acetylglucosamine In Chitin).
