Which of the O Microbe C O Microbe D O Microbe E

Human Anatomy & Physiology (11th Edition)
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Chapter1: The Human Body: An Orientation
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**Question:**

Which of the letter labeled microbes is exhibiting Beta-hemolysis?

**Options:**

- ○ Microbe C
- ○ Microbe D
- ○ Microbe B
- ○ Microbe A
- ○ Both Microbes A and B

**Explanation:**
This question is designed to assess your understanding of beta-hemolysis, which is the complete lysis of red blood cells surrounding a colony on an agar plate. Beta-hemolysis is typically identified by a clear zone around the microbial colonies due to this process.
Transcribed Image Text:**Question:** Which of the letter labeled microbes is exhibiting Beta-hemolysis? **Options:** - ○ Microbe C - ○ Microbe D - ○ Microbe B - ○ Microbe A - ○ Both Microbes A and B **Explanation:** This question is designed to assess your understanding of beta-hemolysis, which is the complete lysis of red blood cells surrounding a colony on an agar plate. Beta-hemolysis is typically identified by a clear zone around the microbial colonies due to this process.
The image displays four panels labeled A, B, C, and D, featuring bacterial colonies on agar plates.

**Panel A:** Displays large, white colonies on a red agar medium. The colonies are closely packed and spherical, indicating a smooth and well-defined growth.

**Panel B:** Shows smaller white colonies on a different medium. There's an inset in the upper right corner zooming in on the colonies, which appear slightly raised but are consistently distributed.

**Panel C:** Features less distinct, translucent colonies on a red agar. The colonies are smaller and less pronounced, with subtle visibility against the background.

**Panel D:** Demonstrates more varied colony sizes on a red agar plate. Colonies show different growth patterns, with some areas having overlapping colonies and a noticeable halo effect around some of the growths, possibly indicating metabolite diffusion or interaction with the medium.

These images are likely used to demonstrate different bacterial growth patterns under varying conditions or on different media types, useful for educational purposes in microbiology.
Transcribed Image Text:The image displays four panels labeled A, B, C, and D, featuring bacterial colonies on agar plates. **Panel A:** Displays large, white colonies on a red agar medium. The colonies are closely packed and spherical, indicating a smooth and well-defined growth. **Panel B:** Shows smaller white colonies on a different medium. There's an inset in the upper right corner zooming in on the colonies, which appear slightly raised but are consistently distributed. **Panel C:** Features less distinct, translucent colonies on a red agar. The colonies are smaller and less pronounced, with subtle visibility against the background. **Panel D:** Demonstrates more varied colony sizes on a red agar plate. Colonies show different growth patterns, with some areas having overlapping colonies and a noticeable halo effect around some of the growths, possibly indicating metabolite diffusion or interaction with the medium. These images are likely used to demonstrate different bacterial growth patterns under varying conditions or on different media types, useful for educational purposes in microbiology.
Expert Solution
Step 1

Beta-hemolysis:- Is a Complete lysis of red blood cells in the media around and under the colonies the area appears lightened and transperent.Streptolysin and  an exotoxin is the enzyme produced by the bacteria which cause the complete lysis of red blood cells.

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