PORTAGE CHEM 210 BIOCHEMISTRY MODULE 1 EXAM QUESTIONS & ANSWERS 2026-2027 | COMPLETE ST… EXAM
P R O F E S S I O N A L P R A C T I C E M AT E R I A L S
Portage CHEM 210 Biochemistry
Module 1 Exam Questions & Answers
2026-2027 | Complete Study Guide |
Verified Practice Test (Rationales)
Verified Answers Exam Ready With Rationales
88 QUESTIONS
DOCUMENT OVERVIEW
This document provides 88 verified exam questions with correct answers and detailed rationales focused on
biochemistry concepts. It serves as a comprehensive study guide for understanding the chemistry of life
and the molecular basis of biological processes. Students can utilize this resource for effective exam
preparation, thorough review, and certification readiness.
CONTENTS
01 Introduction to Biochemistry Q1–Q11
02 Elements and Compounds Q12–Q22
03 Water and Molecular Shapes Q23–Q32
04 Organic Chemistry Basics Q33–Q45
05 Biomolecules and Macromolecules Q46–Q55
06 Cell Structure and Function Q56–Q67
07 Eukaryotic Organelles Q68–Q81
08 Phylogeny in Biochemistry Q82–Q88
Page 1
, E XA M Q U EST I O N S
Q1 QUESTION 1 OF 88
Definition of biochemistry
CORRECT ANSWER
chemistry of life; how properties of organisms relate to their molecules
RATIONALE
Biochemistry explores the molecular mechanisms that underlie biological processes, illustrating how the structure and function of biomolecules, such as
proteins and nucleic acids, are integral to the properties and behaviors of living organisms. This interdisciplinary field bridges biology and chemistry,
providing insights into metabolic pathways and cellular functions essential for life.
Q2 QUESTION 2 OF 88
What are the 3 things biochemists study?
CORRECT ANSWER
1. The relationship between structure and function of biomolecules
2. Chemical reactions of organisms (metabolism)
3. Communication within and among organisms
RATIONALE
Biochemists explore how the molecular structure of biomolecules influences their functionality, the metabolic pathways that drive biochemical reactions,
and the signaling mechanisms that facilitate intercellular communication. This integrated understanding is fundamental to elucidating life processes at a
molecular level.
Q3 QUESTION 3 OF 88
What's another word for a firefly?
CORRECT ANSWER
Lightning bug
RATIONALE
Both "firefly" and "lightning bug" refer to the same bioluminescent insects belonging to the family Lampyridae, known for their ability to produce light
through a chemical reaction. Regional vernacular often influences the common names of species, highlighting the importance of understanding local
terminology in biological classification.
Q4 QUESTION 4 OF 88
Page 2
, How many naturally occurring elements exist? How many are found in living organisms and what kind of elements?
CORRECT ANSWER
90 naturally occurring elements, less than 30 elements are found in living organisms.
Most of these 30 elements are smaller non-metals.
RATIONALE
Ninety naturally occurring elements are established in the periodic table, but only about 30 are essential for life, primarily consisting of smaller non-
metals such as carbon, oxygen, and nitrogen, which are critical for forming biological molecules. This highlights the selective nature of elemental
composition in biological systems, emphasizing the significance of specific elements in metabolic processes.
Q5 QUESTION 5 OF 88
Why are smaller elements favored for living organisms?
CORRECT ANSWER
They can form stable, covalent bonds
RATIONALE
Smaller elements, such as carbon, nitrogen, and oxygen, possess the ability to form stable, covalent bonds due to their suitable atomic structure and
electronegativity, enabling complex organic molecules essential for biological functions. This molecular versatility is foundational for the diversity of life
and the biochemical processes that sustain it.
Q6 QUESTION 6 OF 88
What is the shape and bond angle of water? Explain its bond angle
CORRECT ANSWER
Water is shown in a BENT structure with 104.5 degree bond angle due to the repulsion of electrons in chemical bonds.
RATIONALE
5 degrees. This molecular geometry is a consequence of the VSEPR theory, which predicts that electron pair repulsion determines the spatial arrangement
of atoms.
Q7 QUESTION 7 OF 88
What is organic chemistry?
CORRECT ANSWER
focuses on chemical and physical properties of carbon compounds
RATIONALE
Organic chemistry centers on the study of carbon-containing compounds, emphasizing their structural, chemical, and physical properties, which are
foundational to understanding biochemical processes and material synthesis. This discipline plays a pivotal role in various scientific fields, including
pharmaceuticals, agriculture, and environmental science.
Page 3
P R O F E S S I O N A L P R A C T I C E M AT E R I A L S
Portage CHEM 210 Biochemistry
Module 1 Exam Questions & Answers
2026-2027 | Complete Study Guide |
Verified Practice Test (Rationales)
Verified Answers Exam Ready With Rationales
88 QUESTIONS
DOCUMENT OVERVIEW
This document provides 88 verified exam questions with correct answers and detailed rationales focused on
biochemistry concepts. It serves as a comprehensive study guide for understanding the chemistry of life
and the molecular basis of biological processes. Students can utilize this resource for effective exam
preparation, thorough review, and certification readiness.
CONTENTS
01 Introduction to Biochemistry Q1–Q11
02 Elements and Compounds Q12–Q22
03 Water and Molecular Shapes Q23–Q32
04 Organic Chemistry Basics Q33–Q45
05 Biomolecules and Macromolecules Q46–Q55
06 Cell Structure and Function Q56–Q67
07 Eukaryotic Organelles Q68–Q81
08 Phylogeny in Biochemistry Q82–Q88
Page 1
, E XA M Q U EST I O N S
Q1 QUESTION 1 OF 88
Definition of biochemistry
CORRECT ANSWER
chemistry of life; how properties of organisms relate to their molecules
RATIONALE
Biochemistry explores the molecular mechanisms that underlie biological processes, illustrating how the structure and function of biomolecules, such as
proteins and nucleic acids, are integral to the properties and behaviors of living organisms. This interdisciplinary field bridges biology and chemistry,
providing insights into metabolic pathways and cellular functions essential for life.
Q2 QUESTION 2 OF 88
What are the 3 things biochemists study?
CORRECT ANSWER
1. The relationship between structure and function of biomolecules
2. Chemical reactions of organisms (metabolism)
3. Communication within and among organisms
RATIONALE
Biochemists explore how the molecular structure of biomolecules influences their functionality, the metabolic pathways that drive biochemical reactions,
and the signaling mechanisms that facilitate intercellular communication. This integrated understanding is fundamental to elucidating life processes at a
molecular level.
Q3 QUESTION 3 OF 88
What's another word for a firefly?
CORRECT ANSWER
Lightning bug
RATIONALE
Both "firefly" and "lightning bug" refer to the same bioluminescent insects belonging to the family Lampyridae, known for their ability to produce light
through a chemical reaction. Regional vernacular often influences the common names of species, highlighting the importance of understanding local
terminology in biological classification.
Q4 QUESTION 4 OF 88
Page 2
, How many naturally occurring elements exist? How many are found in living organisms and what kind of elements?
CORRECT ANSWER
90 naturally occurring elements, less than 30 elements are found in living organisms.
Most of these 30 elements are smaller non-metals.
RATIONALE
Ninety naturally occurring elements are established in the periodic table, but only about 30 are essential for life, primarily consisting of smaller non-
metals such as carbon, oxygen, and nitrogen, which are critical for forming biological molecules. This highlights the selective nature of elemental
composition in biological systems, emphasizing the significance of specific elements in metabolic processes.
Q5 QUESTION 5 OF 88
Why are smaller elements favored for living organisms?
CORRECT ANSWER
They can form stable, covalent bonds
RATIONALE
Smaller elements, such as carbon, nitrogen, and oxygen, possess the ability to form stable, covalent bonds due to their suitable atomic structure and
electronegativity, enabling complex organic molecules essential for biological functions. This molecular versatility is foundational for the diversity of life
and the biochemical processes that sustain it.
Q6 QUESTION 6 OF 88
What is the shape and bond angle of water? Explain its bond angle
CORRECT ANSWER
Water is shown in a BENT structure with 104.5 degree bond angle due to the repulsion of electrons in chemical bonds.
RATIONALE
5 degrees. This molecular geometry is a consequence of the VSEPR theory, which predicts that electron pair repulsion determines the spatial arrangement
of atoms.
Q7 QUESTION 7 OF 88
What is organic chemistry?
CORRECT ANSWER
focuses on chemical and physical properties of carbon compounds
RATIONALE
Organic chemistry centers on the study of carbon-containing compounds, emphasizing their structural, chemical, and physical properties, which are
foundational to understanding biochemical processes and material synthesis. This discipline plays a pivotal role in various scientific fields, including
pharmaceuticals, agriculture, and environmental science.
Page 3
