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A SAB agar plate is exposed to air for 30 minutes and then incubated. The 10 colonies which grew on SAB plate are most likely both yeast and mold colonies O yeast colonies only O bacterial colonies only fungal, bacterial, and protozoal colonies

A SAB agar plate is exposed to air for 30 minutes and then incubated. The 10 colonies which grew on SAB plate are most likely both yeast and mold colonies O yeast colonies only O bacterial colonies only fungal, bacterial, and protozoal colonies

Biochemistry
Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
Section: Chapter Questions
Problem 1P
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**Transcription and Explanation for Educational Website** **Introduction to Environmental Sampling Using SAB Agar Plates** SAB agar plates are commonly used to culture fungi, including yeasts and molds, from environmental samples. This method helps in identifying and studying various microbial colonies present in the air. **Image Overview:** The image shows a SAB agar plate after it has been exposed to air for 30 minutes and then incubated. The agar plate displays several distinct microbial colonies. **Explanation of the Agar Plate:** - **Visible Colonies:** The plate contains different colonies, which vary in size, shape, and color. These characteristics can help differentiate between types of microorganisms. - **Likely Organisms:** - **Yeast Colonies:** Typically appear as smooth, creamy colonies. - **Mold Colonies:** Often have a fuzzy or filamentous appearance, with varied coloration. - **Bacterial Colonies:** Generally smaller, smoother, and more uniform in appearance compared to molds. **Question and Answer Section:** *The 10 colonies which grew on the SAB plate are most likely*: - O both yeast and mold colonies - O yeast colonies only - O bacterial colonies only - O fungal, bacterial, and protozoal colonies In this context, the correct identification is crucial for understanding the types of microorganisms present in the air sample. Typically, SAB agar is selective for fungi, so the most probable answer is "both yeast and mold colonies." This exercise illustrates the significance of using selective media for microbial isolation and characterization in various environments.
Transcribed Image Text:**Transcription and Explanation for Educational Website** **Introduction to Environmental Sampling Using SAB Agar Plates** SAB agar plates are commonly used to culture fungi, including yeasts and molds, from environmental samples. This method helps in identifying and studying various microbial colonies present in the air. **Image Overview:** The image shows a SAB agar plate after it has been exposed to air for 30 minutes and then incubated. The agar plate displays several distinct microbial colonies. **Explanation of the Agar Plate:** - **Visible Colonies:** The plate contains different colonies, which vary in size, shape, and color. These characteristics can help differentiate between types of microorganisms. - **Likely Organisms:** - **Yeast Colonies:** Typically appear as smooth, creamy colonies. - **Mold Colonies:** Often have a fuzzy or filamentous appearance, with varied coloration. - **Bacterial Colonies:** Generally smaller, smoother, and more uniform in appearance compared to molds. **Question and Answer Section:** *The 10 colonies which grew on the SAB plate are most likely*: - O both yeast and mold colonies - O yeast colonies only - O bacterial colonies only - O fungal, bacterial, and protozoal colonies In this context, the correct identification is crucial for understanding the types of microorganisms present in the air sample. Typically, SAB agar is selective for fungi, so the most probable answer is "both yeast and mold colonies." This exercise illustrates the significance of using selective media for microbial isolation and characterization in various environments.
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