PORTAGE LEARNING
CHEM 210 – BIOCHEMISTRY
Module 6 Examination
(2026 Updated Version)
Questions with Verified, Fully Detailed Answers
Institution: Portage Learning
Course Code: CHEM 210
Course Title: Biochemistry
Module: Module 6
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
In DNA, Adenine Always Pairs With .
A. Thymine
B. Guanine
C. Uracil
D. Cytosine
E. Both A And B
ANS. A.
In DNA, Base Pairing Follows Chargaff’s Rules. Adenine (A) Forms Two Hydrogen
Bonds Specifically With Thymine (T). Adenine Does Not Pair With Guanine Or
Cytosine, And Uracil Is Found Only In RNA, Not DNA.
Question: 2
Pts
DNA Is Built From Which Of The Following?
A. Nucleosides
B. Genes
C. Purines
D. Nucleotides
E. Codons
ANS. D.
, DNA Is A Polymer Made Of Nucleotides, Each Consisting Of A Nitrogenous Base, A
Pentose Sugar, And A Phosphate Group. Purines Are Only One Component, And
Genes/Codons Are Functional Units, Not Building Blocks.
Question: 3
Pts
The Double Helix Of DNA Is Stabilized Mainly By .
A. Ionic Bonds
B. Covalent Bonds
C. Ion-Dipole Bonds
D. Hydrogen Bonds
E. Hydrogen Covalent Bonds
ANS. D.
The Two Strands Of DNA Are Held Together Primarily By Hydrogen Bonds Between
Complementary Base Pairs (A–T And G–C). Covalent Bonds Form The Backbone, But
Hydrogen Bonds Stabilize The Double Helix Structure.
Question: 4
Pts
Which Of The Following Pentose Sugars Is A Constituent Of DNA?
A. Xylose
B. Ribitol
C. 2-Deoxyribose
D. Arabinose
E. Ribose
CHEM 210 – BIOCHEMISTRY
Module 6 Examination
(2026 Updated Version)
Questions with Verified, Fully Detailed Answers
Institution: Portage Learning
Course Code: CHEM 210
Course Title: Biochemistry
Module: Module 6
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
In DNA, Adenine Always Pairs With .
A. Thymine
B. Guanine
C. Uracil
D. Cytosine
E. Both A And B
ANS. A.
In DNA, Base Pairing Follows Chargaff’s Rules. Adenine (A) Forms Two Hydrogen
Bonds Specifically With Thymine (T). Adenine Does Not Pair With Guanine Or
Cytosine, And Uracil Is Found Only In RNA, Not DNA.
Question: 2
Pts
DNA Is Built From Which Of The Following?
A. Nucleosides
B. Genes
C. Purines
D. Nucleotides
E. Codons
ANS. D.
, DNA Is A Polymer Made Of Nucleotides, Each Consisting Of A Nitrogenous Base, A
Pentose Sugar, And A Phosphate Group. Purines Are Only One Component, And
Genes/Codons Are Functional Units, Not Building Blocks.
Question: 3
Pts
The Double Helix Of DNA Is Stabilized Mainly By .
A. Ionic Bonds
B. Covalent Bonds
C. Ion-Dipole Bonds
D. Hydrogen Bonds
E. Hydrogen Covalent Bonds
ANS. D.
The Two Strands Of DNA Are Held Together Primarily By Hydrogen Bonds Between
Complementary Base Pairs (A–T And G–C). Covalent Bonds Form The Backbone, But
Hydrogen Bonds Stabilize The Double Helix Structure.
Question: 4
Pts
Which Of The Following Pentose Sugars Is A Constituent Of DNA?
A. Xylose
B. Ribitol
C. 2-Deoxyribose
D. Arabinose
E. Ribose
