MICROBIOLOGY EXAM 1 (PEARSON)
QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS ALREADY
PASSED!!!
Question 1: True or False: Biofilms provide microbial pathogens with an
adhesion mechanism and aid in resistance to antimicrobial agents.
A. False
B. True
✔✔ Correct Answer: B (The extracellular polymeric substance matrix acts as a
physical barrier against host immune cells and antibiotics).
Question 2: Which statement best describes the primary role of
microorganisms on planet Earth?
A. Causing infectious disease in animals and humans
B. Supporting life-sustaining ecological processes such as decomposition and
nutrient recycling
C. Exclusively functioning as laboratory models for genetic research
D. Generating atmospheric carbon dioxide as their sole environmental contribution
✔✔ Correct Answer: B (Less than 1% of microbes are pathogenic; their primary
role is foundational to global biogeochemical cycles).
Question 3: Which of the following sets of products represents common
commercial and industrial benefits derived from microorganisms?
A. Cholesterol, starch, and hemoglobin
B. Riboflavin, acetone, and insulin
C. Cellulose, collagen, and thyroxine
D. Epinephrine, albumin, and keratin
,✔✔ Correct Answer: B (Microbes are widely utilized in biotechnology and
industrial fermentation to synthesize vitamins, organic solvents, and therapeutic
proteins).
The term used to describe a disease-causing microorganism is -
ANSWER✔✔Pathogen
Each of the following organisms would be considered a microbe except:
bacterium, protozoan, yeast, virus, or mushroom -ANSWER✔✔Mushroom
Microorganisms are involved in each of the following processes except: smog
production, O2 production, food production, decomposition of organic material,
infection -ANSWER✔✔Smog production
All cells possess a cell wall
T/F -ANSWER✔✔False
A student has obtained a sample of pond water for study. Using the high-power
lens, he observes several cells with nuclei. He can conclude that the cells are not
bacteria
T/F -ANSWER✔✔True
Single-celled and multi-cellular organisms, with a defined nucleus and a variety of
nutritional sources -ANSWER✔✔Eukarya
Archaea differ from bacteria in that archaea
-lack nuclei
-have diverse cell wall compositions
, -reproduce by binary fission
-are prokaryotic
-use organic compounds for food -ANSWER✔✔Have diverse cell wall
compositions
Classification of organisms into three domains is based on -ANSWER✔✔Cellular
organization
The infectious agent that causes AIDS is a _______ -ANSWER✔✔Virus
Protozoan motility structures include ______________ -ANSWER✔✔cilia,
flagella, and pseudopods
Viruses are not considered living organisms because they
-are structurally very simple
-cannot reproduce by themselves
-are typically associated with disease
-can only be visualized using an electron microscope
-are ubiquitous in nature -ANSWER✔✔Cannot reproduce by themselves
A prokaryotic cell may possess each of the following cellular components except
-ribosomes
-flagella
-a nucleus
-a cell membrane
-a cell wall -ANSWER✔✔A nuclues
QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS ALREADY
PASSED!!!
Question 1: True or False: Biofilms provide microbial pathogens with an
adhesion mechanism and aid in resistance to antimicrobial agents.
A. False
B. True
✔✔ Correct Answer: B (The extracellular polymeric substance matrix acts as a
physical barrier against host immune cells and antibiotics).
Question 2: Which statement best describes the primary role of
microorganisms on planet Earth?
A. Causing infectious disease in animals and humans
B. Supporting life-sustaining ecological processes such as decomposition and
nutrient recycling
C. Exclusively functioning as laboratory models for genetic research
D. Generating atmospheric carbon dioxide as their sole environmental contribution
✔✔ Correct Answer: B (Less than 1% of microbes are pathogenic; their primary
role is foundational to global biogeochemical cycles).
Question 3: Which of the following sets of products represents common
commercial and industrial benefits derived from microorganisms?
A. Cholesterol, starch, and hemoglobin
B. Riboflavin, acetone, and insulin
C. Cellulose, collagen, and thyroxine
D. Epinephrine, albumin, and keratin
,✔✔ Correct Answer: B (Microbes are widely utilized in biotechnology and
industrial fermentation to synthesize vitamins, organic solvents, and therapeutic
proteins).
The term used to describe a disease-causing microorganism is -
ANSWER✔✔Pathogen
Each of the following organisms would be considered a microbe except:
bacterium, protozoan, yeast, virus, or mushroom -ANSWER✔✔Mushroom
Microorganisms are involved in each of the following processes except: smog
production, O2 production, food production, decomposition of organic material,
infection -ANSWER✔✔Smog production
All cells possess a cell wall
T/F -ANSWER✔✔False
A student has obtained a sample of pond water for study. Using the high-power
lens, he observes several cells with nuclei. He can conclude that the cells are not
bacteria
T/F -ANSWER✔✔True
Single-celled and multi-cellular organisms, with a defined nucleus and a variety of
nutritional sources -ANSWER✔✔Eukarya
Archaea differ from bacteria in that archaea
-lack nuclei
-have diverse cell wall compositions
, -reproduce by binary fission
-are prokaryotic
-use organic compounds for food -ANSWER✔✔Have diverse cell wall
compositions
Classification of organisms into three domains is based on -ANSWER✔✔Cellular
organization
The infectious agent that causes AIDS is a _______ -ANSWER✔✔Virus
Protozoan motility structures include ______________ -ANSWER✔✔cilia,
flagella, and pseudopods
Viruses are not considered living organisms because they
-are structurally very simple
-cannot reproduce by themselves
-are typically associated with disease
-can only be visualized using an electron microscope
-are ubiquitous in nature -ANSWER✔✔Cannot reproduce by themselves
A prokaryotic cell may possess each of the following cellular components except
-ribosomes
-flagella
-a nucleus
-a cell membrane
-a cell wall -ANSWER✔✔A nuclues
