Portage Learning| BIOL 271 Microbiology w/ Lab Module 6
Exams, All Versions; Latest Question With Verified Answers
Institution: Portage Learning
Course Code: BIOL 271
Course Title: Microbiology w/ Lab
Exam: Module 6 Exams
Topic: Virus Characterization, Morphology And Pathogenic Causative Agents
Edition: Updated Version
Student Name: _______________________________
Student Id: _________________________________
Instructor: _________________________________
Instructions:
Answer All Questions.
Choose The Correct Answer
QUESTIONS TYPE:
➢ Multiple Choice:
➢ True Or False:
➢ Explain/Describe/ Identification
➢ Fill In The Blank
➢ Short Answer
All The Best!!
,Virus Characterization, Morphology And Pathogenic Causative Agents
Question 1.
Because The Genome Is Contained Within An Enclosed Space, (Much Like The Nucleus
Of A Cell) Viruses Are Classified As Eukaryotic. True Or False?
A. True
B. False
ANS. B.
Explanation: Viruses Are Neither Eukaryotic Nor Prokaryotic Because They Are Not
Cellular Organisms.
Question 2.
Although Viruses May Contain Their Genome Within An Enclosed Space (Much Like
The Nucleus Of A Cell), It Is Considered Neither Eukaryotic Nor Prokaryotic. True Or
False?
A. True
B. False
ANS. A.
Explanation: Viruses Fall Outside The Standard Cellular Classification Scheme And Are
Obligate Intracellular Parasites.
Question 3.
Describe The Two Basic Components Of A Virus.
ANS.
Has Genomic Material That Is Made Up Of DNA Or RNA
Has A Membrane Enclosed Structure (Capsid) That Holds The Genetic Material
Explanation: A Virus Contains Genetic Material And A Capsid That Encloses And
Protects The Genetic Material.
,Question 4.
Identify The Following Components Of A Bacteriophage: Image Provided
A. A. Capsid (Head); B. Sheath; C. Nucleic Acid (DNA); D. Collar; E. Tail Fibers; F.
Baseplate; G. Spikes
B. A. Capsid (Head); B. Nucleic Acid (DNA); C. Collar; D. Sheath; E. Baseplate; F.
Spikes; G. Tail Fibers
C. A. Sheath; B. Capsid (Head); C. Baseplate; D. Nucleic Acid (DNA); E. Collar; F. Tail
Fibers; G. Spikes
D. A. Nucleic Acid (DNA); B. Capsid (Head); C. Sheath; D. Tail Fibers; E. Spikes; F.
Collar; G. Baseplate
ANS. B.
Explanation: The Bacteriophage Structures Are Correctly Identified As
A---Capsid (Head)
B---Nucleic Acid (DNA)
C---Collar
D---Sheath
E---Baseplate
F---Spikes
G---Tail Fibers
Question 5.
,Describe The Main Differences Between Lytic And Temperate Phages.
ANS.
Lytic Bacteriophages Replicate Within Host Bacteria Until The Cell Ruptures While
Temperate Phages Remain Non-Replicative In The Bacteria And Doesn't Kill The Cell.
Explanation: Lytic Phages Reproduce And Cause Host-Cell Rupture, Whereas
Temperate Phages Remain Non-Replicative Without Immediately Killing The Cell.
Question 6.
Based On The Following Image, Would You Expect The Viral Titer To Be High Or
Low? Why?
ANS.
I Would Expect The Viral Titer To Be Low Due To The Cloudiness Of The
Sample. The Cloudiness Is A Giveaway That There Are Many Intact
Bacteria Within The Sample. As The Lytic Cycle Continues, The Sample Will
Because Clearer.
Explanation: A Cloudy Sample Indicates Many Intact Bacteria, Suggesting That
Extensive Lysis Has Not Yet Occurred And The Viral Titer Is Low.
Question 7.
The Envelope Surrounds The __________ Of Some Viruses.
A. Capsid
B. Tail
,C. Genome
D. Base Plate
ANS. A.
Explanation: The Envelope Is An Outer Structure That Surrounds The Capsid In
Enveloped Viruses.
Question 8.
The ___________ Surrounds The Capsid Of Some Viruses.
A. Tail
B. Envelope
C. Collar
D. Base Plate
ANS. B.
Explanation: The Envelope Is The Outer Membrane-Like Structure Surrounding The
Capsid Of Some Viruses.
Question 9.
What Virus Is In Below Image? ~30nm (Non-Enveloped And Only ~30 Nm In Diameter)
A. Smallpox Virus
B. Poliovirus
C. Paramyxovirus
D. Influenza Virus
, ANS. B.
Explanation: Poliovirus Is A Small, Non-Enveloped Virus That Is Approximately 30 Nm
In Diameter.
Question 10..
What Virus Is In Below Image? ~200nm (An Enveloped, ~ 200 Nm Long And Has A
Distinct Dumbbell Shaped Viral Capsid)
A. Poliovirus
B. Paramyxovirus
C. Smallpox
D. Adenovirus
ANS. C.
Explanation: Smallpox Virus Is An Enveloped Virus Approximately 200 Nm In Length
With A Characteristic Dumbbell-Shaped Viral Capsid.
Question 11.
What Virus Is In Below Image? 100-150nm
Exams, All Versions; Latest Question With Verified Answers
Institution: Portage Learning
Course Code: BIOL 271
Course Title: Microbiology w/ Lab
Exam: Module 6 Exams
Topic: Virus Characterization, Morphology And Pathogenic Causative Agents
Edition: Updated Version
Student Name: _______________________________
Student Id: _________________________________
Instructor: _________________________________
Instructions:
Answer All Questions.
Choose The Correct Answer
QUESTIONS TYPE:
➢ Multiple Choice:
➢ True Or False:
➢ Explain/Describe/ Identification
➢ Fill In The Blank
➢ Short Answer
All The Best!!
,Virus Characterization, Morphology And Pathogenic Causative Agents
Question 1.
Because The Genome Is Contained Within An Enclosed Space, (Much Like The Nucleus
Of A Cell) Viruses Are Classified As Eukaryotic. True Or False?
A. True
B. False
ANS. B.
Explanation: Viruses Are Neither Eukaryotic Nor Prokaryotic Because They Are Not
Cellular Organisms.
Question 2.
Although Viruses May Contain Their Genome Within An Enclosed Space (Much Like
The Nucleus Of A Cell), It Is Considered Neither Eukaryotic Nor Prokaryotic. True Or
False?
A. True
B. False
ANS. A.
Explanation: Viruses Fall Outside The Standard Cellular Classification Scheme And Are
Obligate Intracellular Parasites.
Question 3.
Describe The Two Basic Components Of A Virus.
ANS.
Has Genomic Material That Is Made Up Of DNA Or RNA
Has A Membrane Enclosed Structure (Capsid) That Holds The Genetic Material
Explanation: A Virus Contains Genetic Material And A Capsid That Encloses And
Protects The Genetic Material.
,Question 4.
Identify The Following Components Of A Bacteriophage: Image Provided
A. A. Capsid (Head); B. Sheath; C. Nucleic Acid (DNA); D. Collar; E. Tail Fibers; F.
Baseplate; G. Spikes
B. A. Capsid (Head); B. Nucleic Acid (DNA); C. Collar; D. Sheath; E. Baseplate; F.
Spikes; G. Tail Fibers
C. A. Sheath; B. Capsid (Head); C. Baseplate; D. Nucleic Acid (DNA); E. Collar; F. Tail
Fibers; G. Spikes
D. A. Nucleic Acid (DNA); B. Capsid (Head); C. Sheath; D. Tail Fibers; E. Spikes; F.
Collar; G. Baseplate
ANS. B.
Explanation: The Bacteriophage Structures Are Correctly Identified As
A---Capsid (Head)
B---Nucleic Acid (DNA)
C---Collar
D---Sheath
E---Baseplate
F---Spikes
G---Tail Fibers
Question 5.
,Describe The Main Differences Between Lytic And Temperate Phages.
ANS.
Lytic Bacteriophages Replicate Within Host Bacteria Until The Cell Ruptures While
Temperate Phages Remain Non-Replicative In The Bacteria And Doesn't Kill The Cell.
Explanation: Lytic Phages Reproduce And Cause Host-Cell Rupture, Whereas
Temperate Phages Remain Non-Replicative Without Immediately Killing The Cell.
Question 6.
Based On The Following Image, Would You Expect The Viral Titer To Be High Or
Low? Why?
ANS.
I Would Expect The Viral Titer To Be Low Due To The Cloudiness Of The
Sample. The Cloudiness Is A Giveaway That There Are Many Intact
Bacteria Within The Sample. As The Lytic Cycle Continues, The Sample Will
Because Clearer.
Explanation: A Cloudy Sample Indicates Many Intact Bacteria, Suggesting That
Extensive Lysis Has Not Yet Occurred And The Viral Titer Is Low.
Question 7.
The Envelope Surrounds The __________ Of Some Viruses.
A. Capsid
B. Tail
,C. Genome
D. Base Plate
ANS. A.
Explanation: The Envelope Is An Outer Structure That Surrounds The Capsid In
Enveloped Viruses.
Question 8.
The ___________ Surrounds The Capsid Of Some Viruses.
A. Tail
B. Envelope
C. Collar
D. Base Plate
ANS. B.
Explanation: The Envelope Is The Outer Membrane-Like Structure Surrounding The
Capsid Of Some Viruses.
Question 9.
What Virus Is In Below Image? ~30nm (Non-Enveloped And Only ~30 Nm In Diameter)
A. Smallpox Virus
B. Poliovirus
C. Paramyxovirus
D. Influenza Virus
, ANS. B.
Explanation: Poliovirus Is A Small, Non-Enveloped Virus That Is Approximately 30 Nm
In Diameter.
Question 10..
What Virus Is In Below Image? ~200nm (An Enveloped, ~ 200 Nm Long And Has A
Distinct Dumbbell Shaped Viral Capsid)
A. Poliovirus
B. Paramyxovirus
C. Smallpox
D. Adenovirus
ANS. C.
Explanation: Smallpox Virus Is An Enveloped Virus Approximately 200 Nm In Length
With A Characteristic Dumbbell-Shaped Viral Capsid.
Question 11.
What Virus Is In Below Image? 100-150nm
