BIOD 171 Comprehensive Final Exam 2026 | Portage Learning |Modules 1–8 High-Yield 200 Verified Q&As & Review Questions
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Exam Coverage Summary
The BIOD 171 (Essential Microbiology) final exam comprehensively assesses foundational
microbiology concepts across eight modules. Key content areas include: microbial cell structure
and function (prokaryotic vs. eukaryotic cells, organelles, cell walls, membranes);
macromolecules (proteins, lipids, nucleic acids, carbohydrates); microscopy and staining
techniques (brightfield, phase-contrast, fluorescence, electron microscopy; Gram staining, acid-
fast staining, simple staining); metabolism (catabolism, anabolism, glycolysis, Krebs cycle,
oxidative phosphorylation, fermentation, photosynthesis); microbial growth and nutrition
(culture media, environmental requirements, bacterial growth curve); microbial genetics (DNA
replication, transcription, translation, gene regulation, mutations, horizontal gene transfer);
virology (viral structure, replication cycles, bacteriophages, viral diseases); immunology (innate
and adaptive immunity, antibodies, antigens, hypersensitivity, vaccines); pathogenic
microbiology (bacterial, viral, fungal, and parasitic pathogens, mechanisms of disease,
transmission); epidemiology and infection control; laboratory techniques (aseptic technique,
culturing, identification, antimicrobial susceptibility testing); and applied microbiology
(biotechnology, environmental microbiology, food microbiology). The exam consists of
approximately 50–70 multiple-choice, true/false, fill-in-the-blank, and short-answer questions
covering the complete Body of Knowledge for Essential Microbiology.
1|Page
,MODULE 1: INTRODUCTION TO MICROBIOLOGY & CELL STRUCTURE (Questions 1–30)
Question 1
Microbiology is the study of what?
A) Only bacteria and their biological processes
B) Microbes (microorganisms and viruses) and their biological processes
C) Only viruses and their replication cycles
D) Only eukaryotic organisms and their cellular processes
Answer: B
Microbiology is the study of microbes (microorganisms and viruses) and their biological processes. This includes
bacteria, archaea, fungi, protozoa, algae, and viruses. Microbiology encompasses their structure, function,
genetics, metabolism, ecology, and interactions with other organisms.
Question 2
What is the smallest biological unit of life?
A) The atom
B) The molecule
C) The cell
D) The tissue
Answer: C
The cell is the smallest biological unit of life. Cells are the fundamental structural and functional units of all living
organisms. They contain genetic material, have a plasma membrane, and carry out metabolic processes necessary
for life.
Question 3
Which of the following is NOT a characteristic of all living cells?
A) Ability to reproduce independently
2|Page
,B) Presence of a nucleus
C) Plasma membrane
D) Genetic material (DNA or RNA)
Answer: B
Not all living cells contain a nucleus. Prokaryotic cells (bacteria and archaea) lack a membrane-bound nucleus,
while eukaryotic cells have a nucleus containing genetic information. All cells have a plasma membrane, genetic
material, and the ability to reproduce.
Question 4
What are the four main types of macromolecules found in cells?
A) Proteins, Lipids, Nucleic Acids, Carbohydrates
B) Proteins, Fats, Sugars, Minerals
C) Amino Acids, Fatty Acids, Nucleotides, Monosaccharides
D) Enzymes, Hormones, Vitamins, Minerals
Answer: A
The four main types of macromolecules found in cells are proteins, lipids, nucleic acids, and carbohydrates.
Proteins are composed of amino acids; lipids include fats and phospholipids; nucleic acids include DNA and RNA;
carbohydrates include sugars and polysaccharides.
Question 5
A virus is considered a microorganism. True or False?
A) True
B) False
Answer: B
False. Viruses are not considered living microorganisms. They are acellular entities that cannot reproduce
independently and lack cellular structures such as a plasma membrane, cytoplasm, and ribosomes. They require a
host cell for replication.
3|Page
, Question 6
What are the two major types of nucleic acids and what are their primary roles?
A) DNA and RNA; DNA stores genetic information, RNA deciphers DNA and synthesizes proteins
B) DNA and RNA; both store genetic information equally
C) DNA only; RNA is not a true nucleic acid
D) RNA and Proteins; proteins carry genetic information
Answer: A
The two major types of nucleic acids are DNA (deoxyribonucleic acid) and RNA (ribonucleic acid). DNA is
responsible for storing and transmitting hereditary information. RNA is responsible for deciphering DNA and
synthesizing proteins.
Question 7
Which of the following cellular components is responsible for protein synthesis?
A) Nucleus
B) Ribosome
C) Golgi apparatus
D) Lysosome
Answer: B
Ribosomes are the cellular organelles responsible for protein synthesis. They can be found free in the cytoplasm or
attached to the rough endoplasmic reticulum. Ribosomes translate messenger RNA (mRNA) into polypeptide
chains.
Question 8
Define an essential amino acid.
A) An amino acid that is produced by the human body in large quantities
B) An amino acid that cannot be produced by the human body and must be obtained from the diet
C) An amino acid that is only found in plant proteins
4|Page
Plus Rationales| 100% GUARANTEED PASS!!!
Exam Coverage Summary
The BIOD 171 (Essential Microbiology) final exam comprehensively assesses foundational
microbiology concepts across eight modules. Key content areas include: microbial cell structure
and function (prokaryotic vs. eukaryotic cells, organelles, cell walls, membranes);
macromolecules (proteins, lipids, nucleic acids, carbohydrates); microscopy and staining
techniques (brightfield, phase-contrast, fluorescence, electron microscopy; Gram staining, acid-
fast staining, simple staining); metabolism (catabolism, anabolism, glycolysis, Krebs cycle,
oxidative phosphorylation, fermentation, photosynthesis); microbial growth and nutrition
(culture media, environmental requirements, bacterial growth curve); microbial genetics (DNA
replication, transcription, translation, gene regulation, mutations, horizontal gene transfer);
virology (viral structure, replication cycles, bacteriophages, viral diseases); immunology (innate
and adaptive immunity, antibodies, antigens, hypersensitivity, vaccines); pathogenic
microbiology (bacterial, viral, fungal, and parasitic pathogens, mechanisms of disease,
transmission); epidemiology and infection control; laboratory techniques (aseptic technique,
culturing, identification, antimicrobial susceptibility testing); and applied microbiology
(biotechnology, environmental microbiology, food microbiology). The exam consists of
approximately 50–70 multiple-choice, true/false, fill-in-the-blank, and short-answer questions
covering the complete Body of Knowledge for Essential Microbiology.
1|Page
,MODULE 1: INTRODUCTION TO MICROBIOLOGY & CELL STRUCTURE (Questions 1–30)
Question 1
Microbiology is the study of what?
A) Only bacteria and their biological processes
B) Microbes (microorganisms and viruses) and their biological processes
C) Only viruses and their replication cycles
D) Only eukaryotic organisms and their cellular processes
Answer: B
Microbiology is the study of microbes (microorganisms and viruses) and their biological processes. This includes
bacteria, archaea, fungi, protozoa, algae, and viruses. Microbiology encompasses their structure, function,
genetics, metabolism, ecology, and interactions with other organisms.
Question 2
What is the smallest biological unit of life?
A) The atom
B) The molecule
C) The cell
D) The tissue
Answer: C
The cell is the smallest biological unit of life. Cells are the fundamental structural and functional units of all living
organisms. They contain genetic material, have a plasma membrane, and carry out metabolic processes necessary
for life.
Question 3
Which of the following is NOT a characteristic of all living cells?
A) Ability to reproduce independently
2|Page
,B) Presence of a nucleus
C) Plasma membrane
D) Genetic material (DNA or RNA)
Answer: B
Not all living cells contain a nucleus. Prokaryotic cells (bacteria and archaea) lack a membrane-bound nucleus,
while eukaryotic cells have a nucleus containing genetic information. All cells have a plasma membrane, genetic
material, and the ability to reproduce.
Question 4
What are the four main types of macromolecules found in cells?
A) Proteins, Lipids, Nucleic Acids, Carbohydrates
B) Proteins, Fats, Sugars, Minerals
C) Amino Acids, Fatty Acids, Nucleotides, Monosaccharides
D) Enzymes, Hormones, Vitamins, Minerals
Answer: A
The four main types of macromolecules found in cells are proteins, lipids, nucleic acids, and carbohydrates.
Proteins are composed of amino acids; lipids include fats and phospholipids; nucleic acids include DNA and RNA;
carbohydrates include sugars and polysaccharides.
Question 5
A virus is considered a microorganism. True or False?
A) True
B) False
Answer: B
False. Viruses are not considered living microorganisms. They are acellular entities that cannot reproduce
independently and lack cellular structures such as a plasma membrane, cytoplasm, and ribosomes. They require a
host cell for replication.
3|Page
, Question 6
What are the two major types of nucleic acids and what are their primary roles?
A) DNA and RNA; DNA stores genetic information, RNA deciphers DNA and synthesizes proteins
B) DNA and RNA; both store genetic information equally
C) DNA only; RNA is not a true nucleic acid
D) RNA and Proteins; proteins carry genetic information
Answer: A
The two major types of nucleic acids are DNA (deoxyribonucleic acid) and RNA (ribonucleic acid). DNA is
responsible for storing and transmitting hereditary information. RNA is responsible for deciphering DNA and
synthesizing proteins.
Question 7
Which of the following cellular components is responsible for protein synthesis?
A) Nucleus
B) Ribosome
C) Golgi apparatus
D) Lysosome
Answer: B
Ribosomes are the cellular organelles responsible for protein synthesis. They can be found free in the cytoplasm or
attached to the rough endoplasmic reticulum. Ribosomes translate messenger RNA (mRNA) into polypeptide
chains.
Question 8
Define an essential amino acid.
A) An amino acid that is produced by the human body in large quantities
B) An amino acid that cannot be produced by the human body and must be obtained from the diet
C) An amino acid that is only found in plant proteins
4|Page
