Portage Learning| BIOL 271 Microbiology w/ Lab Module 5 Exams All Versions; Latest Questions With Verified Answers

Portage Learning| BIOL 271 Microbiology w/ Lab Module 5
Exams All Versions; Latest Questions With Verified Answers


Institution: Portage Learning
Course Code: BIOL 271
Course Title: Microbiology w/ Lab
Exam: Module 5 Exams
Topic: Personal Protective Equipment And Pathogenic Microbes
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!!

, Personal Protective Equipment And Pathogenic Microbes

Question 1.
Define The Concept Of Universal Precautions.
ANS. Universal Precautions Means Any And All Samples, Whether Known Or
Unknown, Are To Be Treated As Potentially Hazardous (Or Pathogenic) Materials.
Explanation: Universal Precautions Require All Samples To Be Handled As Potentially
Hazardous, Regardless Of Whether The Sample Is Known To Contain A Pathogen.


Question 2.
List At Least 3 Observations A Researcher Would Be Sure To Note While Assessing An
Unknown Microbial Sample.
ANS.
1. Size And Shape
2. Any Observable Motility
3. Gram Status (Positive Or Negative)
4. The Presence Of Any Chemical Reactions
5. Changes In Color Localized To The Organism Or The Surrounding Media
6. Capture (Or Draw) Images Of Any Of The Characteristics Described Above
Explanation: All These Are Observations That Can Be Made When Assessing An
Unknown Microbial Sample.


Question 3.
Identify The Following Disease In Below Image:

,A. Tetanus
B. Frost Bite
C. Anthrax
D. Gas Gangrene
ANS. C.
Explanation: Bacillus Anthracis Is Gram-Positive And Causes Anthrax. A Large,
Painless Boil With A Distinct Black Center At The Site Of Infection Is A Hallmark Of
Anthrax Infection.


Question 4.
While Observing An Unknown Sample Of Limited Amounts, A Researcher Must
Determine The Following Observations: (1) The Presence Of Any Motility And (2) Its
Gram Status Using The Same Sample—The Liquid Sample Cannot Be Divided. Which
Would You Determine First And Why?
ANS. You Must Determine Motility Before Determining The Gram Status. Motility
Requires A Wet Mount, While Gram Staining Requires Heat Fixing The Sample. If One
Were To Begin With The Gram Stain The Heat Fixation Process Would Kill The
Organism, Making Any Observations Regarding Motility Impossible. The Correct
Approach Would Be To Place The Liquid Culture On A Glass Slide And Determine Its
Motility Status. Next, The Same Liquid Culture Can Be Heat Fixed And Gram Stained.
Explanation: Motility Must Be Determined First Because The Wet Mount Preserves The
Organism's Ability To Move, Whereas Heat Fixation During Gram Staining Kills The
Organism.


Question 5.
A Facultative Anaerobe Is A Microorganism Capable Of Growth Under What
Conditions?
A. Only Aerobic (With Oxygen) Conditions
B. Only Anaerobic (Without Oxygen) Conditions
C. Aerobic (With Oxygen) And Anaerobic (Without Oxygen) Conditions
D. Only Conditions With Low Oxygen Levels

,ANS. C.
Explanation: A Facultative Anaerobe Is Capable Of Growth Under Both Aerobic (With
Oxygen) And Anaerobic (Without Oxygen) Conditions.


Question 6.
Identify The Following Disease In Below Image:




A. Tetanus
B. Streptococcal Pharyngitis (Strep Throat)
C. Rheumatic Fever
D. Streptococcal Septicemia (Blood Poisoning)
ANS. B.
Explanation: Streptococcal Pharyngitis, Commonly Called Strep Throat, Is An Infection
Of The Throat Caused By Streptococcus Bacteria. Streptococcus Is A Gram-Positive,
Round Bacterium That Tends To Link To Other Bacteria In Chain-Like Structures.
The Infection Commonly Affects The Throat And Can Cause Symptoms Such As A Sore
Throat, Difficulty Swallowing, Fever, And Swollen Lymph Nodes. Untreated
Streptococcal Pharyngitis Can Lead To Complications Such As Rheumatic Fever.


Question 7.
The Lancefield Groups Are Used To Subdivide Antigenic Groups Of Gamma-Hemolytic
Streptococcus.
A. True
B. False
ANS. B.

,Explanation: Lancefield Groups Are Used To Subdivide Antigenic Groups Of Beta-
Hemolytic Streptococcus, Not Gamma-Hemolytic Streptococcus.


Question 8.
The Lancefield Groups Are Used To Subdivide Antigenic Groups Of Alpha-Hemolytic
Streptococcus?
A. True
B. False
ANS. B.
Explanation: Lancefield Groups Subdivide Beta-Hemolytic Streptococcus, Not Alpha-
Hemolytic.


Question 9.
The Lancefield Groupings Are Used To Subdivide Beta-Hemolytic Strep. ?
A. True
B. False
C. Both True And False
D. Neither True Nor False
ANS. A.
Explanation: Lancefield Grouping (A–V) Is Based On The Carbohydrate Composition
Of Cell-Wall Antigens In Beta-Hemolytic Streptococci.


Question 10.
Identify The Following Disease In Below Image:

, A. Streptococcal Pharyngitis (Strep Throat)
B. Rheumatic Fever
C. Anthrax
D. Streptococcal Septicemia (Blood Poisoning)
ANS. B.
Explanation: Rheumatic Fever Is An Inflammatory Complication That Can Occur After
An Untreated Streptococcal Pharyngitis (Strep Throat) Infection. It Can Develop When
The Body's Immune Response To The Streptococcus Infection Causes Inflammation In
Other Tissues. Rheumatic Fever Is Associated With Beta-Hemolytic Streptococcus And
Can Affect The Heart, Joints, Skin, And Nervous System. It May Occur In
Approximately 3% Of Untreated Cases.


Question 11.
The Distinctions For Lancefield Subgroupings Lie In Its: (Select All That Apply)
A. Catalase Activity
B. Carbohydrate Composition Of Antigens
C. Hemolytic Activity
D. All Of The Above
ANS. B.
Explanation: Lancefield Groups Are Defined By The Carbohydrate Composition Of
Cell-Wall Antigens.


Question 12.
Rheumatic Fever Displays __ Hemolytic Activity And Occurs When __ Is Left
Untreated.
A. Beta; Strep. Pharyngitis
B. Gamma; Strep. Septicemia
C. Beta; Rheumatic Fever
D. Alpha; Strep. Pharyngitis
ANS. A.