Table of contents

1. Introduction to Microbiology3h 22m
2. Disproving Spontaneous Generation1h 18m
3. Chemical Principles of Microbiology3h 38m
4. Water1h 28m
5. Molecules of Microbiology2h 23m
6. Cell Membrane & Transport3h 28m
7. Prokaryotic Cell Structures & Functions5h 52m
8. Eukaryotic Cell Structures & Functions2h 18m
9. Microscopes2h 46m
10. Dynamics of Microbial Growth4h 36m
11. Controlling Microbial Growth4h 10m
12. Microbial Metabolism5h 16m
13. Photosynthesis2h 31m
14. DNA Replication2h 25m
15. Central Dogma & Gene Regulation7h 14m
16. Microbial Genetics4h 44m
17. Biotechnology3h 0m
18. Viruses, Viroids, & Prions4h 56m
19. Innate Immunity7h 15m
20. Adaptive Immunity7h 14m
21. Principles of Disease6h 57m

10. Dynamics of Microbial Growth

Differential Media

Microbiology

10. Dynamics of Microbial Growth

Differential Media

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Multiple Choice

Streptococcus pneumoniae is an alpha-hemolytic bacterial species. If Streptococcus pneumoniae is grown on a blood agar plate, what characteristics will the zone of clearance for this species have?

The zone of clearance will be large and bright yellow in color.

The zone of clearance will be small and a greenish color.

This bacterial species will show no zone of clearance on a blood agar plate.

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Verified step by step guidance

Understand the concept of hemolysis: Hemolysis refers to the breakdown of red blood cells, and different bacteria exhibit different types of hemolysis on blood agar plates.

Identify the type of hemolysis: Streptococcus pneumoniae is known to be alpha-hemolytic. Alpha-hemolysis is characterized by partial hemolysis of red blood cells.

Recognize the appearance of alpha-hemolysis: On a blood agar plate, alpha-hemolysis results in a greenish discoloration around the bacterial colonies due to the partial breakdown of hemoglobin.

Compare with other types of hemolysis: Beta-hemolysis results in a clear, colorless zone due to complete lysis of red blood cells, while gamma-hemolysis shows no change in the blood agar.

Conclude the characteristics of the zone of clearance: For Streptococcus pneumoniae, the zone of clearance will be small and greenish in color, indicating partial hemolysis typical of alpha-hemolytic bacteria.