PORTAGE LEARNING
May 24, 2026 — 11:17 AM
Module 1 Exam - Requires Respondus LockDown Browser + Webcam
Due No due date Points 100 Questions 27 Time Limit 120 Minutes Requires Respondus LockDown Browser
Instructions
Please read the following before beginning the exam:
You must TYPE your work for calculations or give an explanation for short answer questions in order to receive credit.
You may only use the methods and explanations provided by this course for your answers. The use of a method or
explanation that was not taught in this course is a violation of the Academic Integrity Policy.
You MUST only use the exam resource bank that is provided within the exam.
The use of printed versions of the exam resource bank will be considered a violation of the Academic Integrity Policy.
Any equation or constant used on an exam that is not from the exam resource bank and is different from the method taught
in this course will be considered an outside source and a violation of the Academic Integrity Policy.
During module exams you may not use any outside source of information such as the module, problem sets, notes, Internet,
tutor, etc.
The only items you are allowed to have in front of you are your computer, 1-2 pieces of blank scratch paper, a calculator
(non-cell phone), and a pen/pencil.
Your desk should be free of all other items and clutter.
Attempt History
Attempt Time Score
LATEST REDACTED REDACTED REDACTED
Question 1 pts
Resource Bank
Scientific Calculator
A bacterium that exhibits a "cluster" arrangement of spherical cells is best classified as:
a) Streptococcus
b) Staphylococcus
c) Diplococcus
d) Sarcina
Correct!
,Question 2 pts
Resource Bank
Scientific Calculator
In a diagram of a bacterial cell, which structure would be labeled as the primary site of oxidative
phosphorylation?
a) Cytoplasm
b) Nucleoid
c) Plasma membrane
d) Ribosome
Correct!
Question 3 pts
Resource Bank
Scientific Calculator
True or False: The endosymbiotic theory provides a robust explanation for the presence of double
membranes in mitochondria and chloroplasts.
True False
Correct!
Question 4 pts
Resource Bank
Scientific Calculator
The bacterial cell wall is primarily composed of .
Answer: Peptidoglycan
Correct!
Question 5 pts
Resource Bank
Scientific Calculator
Which of the following is an exclusive feature of eukaryotic cells?
, a) 70S ribosomes
b) Nucleus
c) Peptidoglycan
d) Binary fission
Correct!
Question 6 pts
Resource Bank
Scientific Calculator
A 34-year-old patient presents with a rapidly spreading skin infection. Culture reveals Gram-positive cocci in
clusters that are catalase-positive.
a) Identify the most likely genus and explain your reasoning. (2 pts)
b) In your own words, describe the structural feature of this organism's cell wall that causes it to retain crystal
violet during Gram staining. Include the role of teichoic acids. (3 pts)
c) The physician prescribes a β-lactam antibiotic. Explain the specific molecular target of this drug class and
why it is effective against this organism but not against Mycobacterium tuberculosis. (3 pts)
a) Staphylococcus — clusters (staphylo-), catalase-positive.
b) Thick peptidoglycan layer with embedded teichoic acids; teichoic acids anchor the wall, regulate cations,
contribute to negative charge, and are antigenic. The crystal violet-iodine complex gets trapped in this thick mesh.
c) β-lactams inhibit transpeptidases (penicillin-binding proteins) that cross-link peptidoglycan. Mycobacterium has
a mycolic acid-arabinogalactan-peptidoglycan complex; its outer waxy layer blocks drug access, and its
peptidoglycan has different cross-linking.
Correct!
Question 7 pts
Resource Bank
Scientific Calculator
Match the term to its function:
Term Function
1. Pilus b) Transfer of antibiotic resistance genes
2. Fimbriae a) Attachment to host epithelial cells
3. Capsule c) Evasion of phagocytosis
4. Slime layer d) Formation of biofilm on medical devices
May 24, 2026 — 11:17 AM
Module 1 Exam - Requires Respondus LockDown Browser + Webcam
Due No due date Points 100 Questions 27 Time Limit 120 Minutes Requires Respondus LockDown Browser
Instructions
Please read the following before beginning the exam:
You must TYPE your work for calculations or give an explanation for short answer questions in order to receive credit.
You may only use the methods and explanations provided by this course for your answers. The use of a method or
explanation that was not taught in this course is a violation of the Academic Integrity Policy.
You MUST only use the exam resource bank that is provided within the exam.
The use of printed versions of the exam resource bank will be considered a violation of the Academic Integrity Policy.
Any equation or constant used on an exam that is not from the exam resource bank and is different from the method taught
in this course will be considered an outside source and a violation of the Academic Integrity Policy.
During module exams you may not use any outside source of information such as the module, problem sets, notes, Internet,
tutor, etc.
The only items you are allowed to have in front of you are your computer, 1-2 pieces of blank scratch paper, a calculator
(non-cell phone), and a pen/pencil.
Your desk should be free of all other items and clutter.
Attempt History
Attempt Time Score
LATEST REDACTED REDACTED REDACTED
Question 1 pts
Resource Bank
Scientific Calculator
A bacterium that exhibits a "cluster" arrangement of spherical cells is best classified as:
a) Streptococcus
b) Staphylococcus
c) Diplococcus
d) Sarcina
Correct!
,Question 2 pts
Resource Bank
Scientific Calculator
In a diagram of a bacterial cell, which structure would be labeled as the primary site of oxidative
phosphorylation?
a) Cytoplasm
b) Nucleoid
c) Plasma membrane
d) Ribosome
Correct!
Question 3 pts
Resource Bank
Scientific Calculator
True or False: The endosymbiotic theory provides a robust explanation for the presence of double
membranes in mitochondria and chloroplasts.
True False
Correct!
Question 4 pts
Resource Bank
Scientific Calculator
The bacterial cell wall is primarily composed of .
Answer: Peptidoglycan
Correct!
Question 5 pts
Resource Bank
Scientific Calculator
Which of the following is an exclusive feature of eukaryotic cells?
, a) 70S ribosomes
b) Nucleus
c) Peptidoglycan
d) Binary fission
Correct!
Question 6 pts
Resource Bank
Scientific Calculator
A 34-year-old patient presents with a rapidly spreading skin infection. Culture reveals Gram-positive cocci in
clusters that are catalase-positive.
a) Identify the most likely genus and explain your reasoning. (2 pts)
b) In your own words, describe the structural feature of this organism's cell wall that causes it to retain crystal
violet during Gram staining. Include the role of teichoic acids. (3 pts)
c) The physician prescribes a β-lactam antibiotic. Explain the specific molecular target of this drug class and
why it is effective against this organism but not against Mycobacterium tuberculosis. (3 pts)
a) Staphylococcus — clusters (staphylo-), catalase-positive.
b) Thick peptidoglycan layer with embedded teichoic acids; teichoic acids anchor the wall, regulate cations,
contribute to negative charge, and are antigenic. The crystal violet-iodine complex gets trapped in this thick mesh.
c) β-lactams inhibit transpeptidases (penicillin-binding proteins) that cross-link peptidoglycan. Mycobacterium has
a mycolic acid-arabinogalactan-peptidoglycan complex; its outer waxy layer blocks drug access, and its
peptidoglycan has different cross-linking.
Correct!
Question 7 pts
Resource Bank
Scientific Calculator
Match the term to its function:
Term Function
1. Pilus b) Transfer of antibiotic resistance genes
2. Fimbriae a) Attachment to host epithelial cells
3. Capsule c) Evasion of phagocytosis
4. Slime layer d) Formation of biofilm on medical devices
