Portage Learning| BIOL 271 Microbiology Lab 5 Exams
All Versions; Latest Questions With Verified Answers
Institution: Portage Learning
Course Code: BIOL 271
Course Title: Microbiology w/ Lab
Exam: Lab 5 Exams
Topic: Antibiotic Sensitivity Testing
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!!
, Antibiotic Sensitivity Testing
Question 1.
After Observing The Results Of The Disk Diffusion Test On E. Coli In Experiment 1,
Which Antibiotic Is The Most Effective In Blocking Growth Of The Bacteria?
A. Penicillin
B. Gentamicin
C. Erythromycin
D. Tetracycline
ANS. B.
Explanation: Gentamicin Produced The Greatest Inhibition Of E. Coli Growth In The
Disk Diffusion Test.
Question 2.
After Observing The Results Of The Disk Diffusion Test On S. Aureus In Experiment 2,
Which Antibiotic Is The Most Effective In Blocking Growth Of The Bacteria
A. Erythromycin
B. Tetracycline
C. Penicillin
D. Gentamicin
ANS. C.
Explanation: Penicillin Was The Most Effective Antibiotic Against S. Aureus Based On
The Observed Disk Diffusion Results.
Question 3.
Which Antibiotic Is Most Effective In Blocking The Growth Of MRSA
A. Erythromycin
B. Sulfamethoxazole
,C. Penicillin
D. Tetracycline
ANS. B.
Explanation: Sulfamethoxazole Is The Antibiotic Identified As Most Effective Against
MRSA.
Question 4.
Which Antibiotic Could Be Used To Treat An Infection Of Either S. Aureus Or MRSA
A. Erythromycin
B. Penicillin
C. Tetracycline
D. Gentamicin
ANS. C.
Explanation: Tetracycline Is Identified As Effective For Treating Infections Caused By
Either S. Aureus Or MRSA.
Question 5.
The Antibiotic That Is Ineffective Or Only Slightly Effective Against Treating Infections
Of These Three Bacteria Is Erythromycin
A. True
B. False
C. Both A And B
D. Neither A Nor B
ANS. A.
Explanation: The Statement Identifies Erythromycin As Ineffective Or Only Slightly
Effective Against The Three Bacteria.
Question 6.
The Most Effective Antibiotic For Treating Infections Of These Three Bacteria Is
Penicillin
,A. True
B. False
C. Both A And B
D. Neither A Nor B
ANS. A.
Explanation: The Statement Identifies Penicillin As The Most Effective Antibiotic For
Treating Infections Of These Three Bacteria.
Question 7.
An Infectious Skin Rash Has Broken Out Among Some Members Of A Local Gym. The
Bacteria, Called Sr For Skin Rash, Have Been Cultured And Tested For Sensitivity To
Five Common Antibiotics. Evaluate The Relative Potency Of Each Antibiotic: Very
Potent, Moderately Potent, Or Not Potent
A. Very Potent; Moderately Potent; Not Potent; Very Potent; Not Potent
B. Moderately Potent; Very Potent; Not Potent; Moderately Potent; Very Potent
C. Not Potent; Moderately Potent; Very Potent; Not Potent; Moderately Potent
D. Very Potent; Not Potent; Moderately Potent; Very Potent; Moderately Potent
ANS. A.
Explanation: The Relative Potency Of The Five Antibiotics Is Identified In The Given
Order.
Question 8.
When An Antibiotic Disk Is Placed On The Surface Of Inoculated Agar, The Antibiotic
Diffuses Into The Agar, Potentially Producing ____ Around The Disk. By The End Of
The Incubation Period, The Concentration Of Antibiotic In The Agar Is ___
A. A Zone Where Bacterial Growth Is Inhibited; Highest Near The Disk And
Progressively Lower Further From The Disk
B. Bacterial Growth; Lowest Near The Disk And Progressively Higher Further From The
Disk
C. A Zone Of Bacterial Growth; Highest Near The Disk And Progressively Lower
,Further From The Disk
D. No Zone; Equal Throughout The Agar
ANS. A.
Explanation: Antibiotic Concentration Is Highest Near The Disk And Decreases With
Distance, Producing A Zone Where Susceptible Bacterial Growth Is Inhibited.
Question 9.
Based On Her Data, Which Bacterial Types Might Potentially Be Susceptible To
Pathocycline If The Antibiotic Was Used To Treat An Infected Person?
A. Type A; Type C
B. Type B; Type C
C. Type A; Type B
D. Type A; Type B; Type C
ANS. A.
Explanation: Based On Her Data, Type A And Type C Might Potentially Be Susceptible
To Pathocycline.
Question 10.
Based On Her Data, Which Type Of Bacteria Can Be Kept From Reproducing With The
Least Amount Of Pathocycline?
A. Type A
B. Type B
C. Either Type A Or Type B
D. Type C
ANS. C.
Explanation: Either Type A Or Type B Can Be Kept From Reproducing With The Least
Amount Of Pathocycline.
Question 11.
Antibiotics
,A. Produced By Microorganisms; Natural Substances
B. Produced By Animals; Synthetic Substances
C. Produced By Microorganisms; Synthetic Substances
D. Produced By Plants; Natural Substances
ANS. A.
Explanation: Antibiotics Are Natural Substances Produced By Microorganisms.
Question 12.
Antimicrobials
A. Encompass Only Synthetic Treatments
B. Encompass Natural As Well As Synthetic Treatments
C. Encompass Only Natural Treatments
D. Encompass Treatments That Target Viruses Only
ANS. B.
Explanation: Antimicrobials Include Both Naturally Occurring And Synthetic
Treatments.
Question 13.
Antibiotic Sensitivity Testing
A. Used To Identify The Shape Of Bacterial Cells
B. Used To Measure The Effectiveness Of Antimicrobials Against Pathogenic Organisms
C. Used To Determine The Nutritional Requirements Of Bacteria
D. Used To Measure Bacterial Cell Size
ANS. B.
Explanation: Antibiotic Sensitivity Testing Determines How Effective Antimicrobials
Are Against Pathogenic Organisms.
Question 14.
Identify The Test Shown In The Image.
, A. Gram Stain
B. Kirby-Bauer Test
C. Endospore Stain
D. Acid-Fast Stain
ANS. B.
Explanation:
Also Known As The Disk Diffusion Test
Antibiotic Impregnated Disks Placed Onto Plates With Bacterial Lawn Growth
Plates Incubated To Allow For Diffusion Of Antimicrobial As Well As Growth Of
Bacteria
Clear Zone Will Show Up Around The Disk If Organism Is Susceptible To The
Antimicrobial
Question 15.
Identify The Clear Area Surrounding An Antibiotic Disk In The Image.
All Versions; Latest Questions With Verified Answers
Institution: Portage Learning
Course Code: BIOL 271
Course Title: Microbiology w/ Lab
Exam: Lab 5 Exams
Topic: Antibiotic Sensitivity Testing
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!!
, Antibiotic Sensitivity Testing
Question 1.
After Observing The Results Of The Disk Diffusion Test On E. Coli In Experiment 1,
Which Antibiotic Is The Most Effective In Blocking Growth Of The Bacteria?
A. Penicillin
B. Gentamicin
C. Erythromycin
D. Tetracycline
ANS. B.
Explanation: Gentamicin Produced The Greatest Inhibition Of E. Coli Growth In The
Disk Diffusion Test.
Question 2.
After Observing The Results Of The Disk Diffusion Test On S. Aureus In Experiment 2,
Which Antibiotic Is The Most Effective In Blocking Growth Of The Bacteria
A. Erythromycin
B. Tetracycline
C. Penicillin
D. Gentamicin
ANS. C.
Explanation: Penicillin Was The Most Effective Antibiotic Against S. Aureus Based On
The Observed Disk Diffusion Results.
Question 3.
Which Antibiotic Is Most Effective In Blocking The Growth Of MRSA
A. Erythromycin
B. Sulfamethoxazole
,C. Penicillin
D. Tetracycline
ANS. B.
Explanation: Sulfamethoxazole Is The Antibiotic Identified As Most Effective Against
MRSA.
Question 4.
Which Antibiotic Could Be Used To Treat An Infection Of Either S. Aureus Or MRSA
A. Erythromycin
B. Penicillin
C. Tetracycline
D. Gentamicin
ANS. C.
Explanation: Tetracycline Is Identified As Effective For Treating Infections Caused By
Either S. Aureus Or MRSA.
Question 5.
The Antibiotic That Is Ineffective Or Only Slightly Effective Against Treating Infections
Of These Three Bacteria Is Erythromycin
A. True
B. False
C. Both A And B
D. Neither A Nor B
ANS. A.
Explanation: The Statement Identifies Erythromycin As Ineffective Or Only Slightly
Effective Against The Three Bacteria.
Question 6.
The Most Effective Antibiotic For Treating Infections Of These Three Bacteria Is
Penicillin
,A. True
B. False
C. Both A And B
D. Neither A Nor B
ANS. A.
Explanation: The Statement Identifies Penicillin As The Most Effective Antibiotic For
Treating Infections Of These Three Bacteria.
Question 7.
An Infectious Skin Rash Has Broken Out Among Some Members Of A Local Gym. The
Bacteria, Called Sr For Skin Rash, Have Been Cultured And Tested For Sensitivity To
Five Common Antibiotics. Evaluate The Relative Potency Of Each Antibiotic: Very
Potent, Moderately Potent, Or Not Potent
A. Very Potent; Moderately Potent; Not Potent; Very Potent; Not Potent
B. Moderately Potent; Very Potent; Not Potent; Moderately Potent; Very Potent
C. Not Potent; Moderately Potent; Very Potent; Not Potent; Moderately Potent
D. Very Potent; Not Potent; Moderately Potent; Very Potent; Moderately Potent
ANS. A.
Explanation: The Relative Potency Of The Five Antibiotics Is Identified In The Given
Order.
Question 8.
When An Antibiotic Disk Is Placed On The Surface Of Inoculated Agar, The Antibiotic
Diffuses Into The Agar, Potentially Producing ____ Around The Disk. By The End Of
The Incubation Period, The Concentration Of Antibiotic In The Agar Is ___
A. A Zone Where Bacterial Growth Is Inhibited; Highest Near The Disk And
Progressively Lower Further From The Disk
B. Bacterial Growth; Lowest Near The Disk And Progressively Higher Further From The
Disk
C. A Zone Of Bacterial Growth; Highest Near The Disk And Progressively Lower
,Further From The Disk
D. No Zone; Equal Throughout The Agar
ANS. A.
Explanation: Antibiotic Concentration Is Highest Near The Disk And Decreases With
Distance, Producing A Zone Where Susceptible Bacterial Growth Is Inhibited.
Question 9.
Based On Her Data, Which Bacterial Types Might Potentially Be Susceptible To
Pathocycline If The Antibiotic Was Used To Treat An Infected Person?
A. Type A; Type C
B. Type B; Type C
C. Type A; Type B
D. Type A; Type B; Type C
ANS. A.
Explanation: Based On Her Data, Type A And Type C Might Potentially Be Susceptible
To Pathocycline.
Question 10.
Based On Her Data, Which Type Of Bacteria Can Be Kept From Reproducing With The
Least Amount Of Pathocycline?
A. Type A
B. Type B
C. Either Type A Or Type B
D. Type C
ANS. C.
Explanation: Either Type A Or Type B Can Be Kept From Reproducing With The Least
Amount Of Pathocycline.
Question 11.
Antibiotics
,A. Produced By Microorganisms; Natural Substances
B. Produced By Animals; Synthetic Substances
C. Produced By Microorganisms; Synthetic Substances
D. Produced By Plants; Natural Substances
ANS. A.
Explanation: Antibiotics Are Natural Substances Produced By Microorganisms.
Question 12.
Antimicrobials
A. Encompass Only Synthetic Treatments
B. Encompass Natural As Well As Synthetic Treatments
C. Encompass Only Natural Treatments
D. Encompass Treatments That Target Viruses Only
ANS. B.
Explanation: Antimicrobials Include Both Naturally Occurring And Synthetic
Treatments.
Question 13.
Antibiotic Sensitivity Testing
A. Used To Identify The Shape Of Bacterial Cells
B. Used To Measure The Effectiveness Of Antimicrobials Against Pathogenic Organisms
C. Used To Determine The Nutritional Requirements Of Bacteria
D. Used To Measure Bacterial Cell Size
ANS. B.
Explanation: Antibiotic Sensitivity Testing Determines How Effective Antimicrobials
Are Against Pathogenic Organisms.
Question 14.
Identify The Test Shown In The Image.
, A. Gram Stain
B. Kirby-Bauer Test
C. Endospore Stain
D. Acid-Fast Stain
ANS. B.
Explanation:
Also Known As The Disk Diffusion Test
Antibiotic Impregnated Disks Placed Onto Plates With Bacterial Lawn Growth
Plates Incubated To Allow For Diffusion Of Antimicrobial As Well As Growth Of
Bacteria
Clear Zone Will Show Up Around The Disk If Organism Is Susceptible To The
Antimicrobial
Question 15.
Identify The Clear Area Surrounding An Antibiotic Disk In The Image.
