Question 9 (1 point) Listen Bacillus stearothermophilus is a useful as an indicator of sterility. What would be the reason? It forms cysts which resist a wide range of disinfectant methods. It has a cell wall containing a waxy compound which protects it from drying and aqueous disinfectants. It is a very common contaminant. It forms endospores, among the hardest to kill through chemical and physical methods. Only incineration will destroy it. Previous Page Next Page
Added by Jennifer S.
Close
Step 1
This is because it forms endospores, which are highly resistant to heat, radiation, and chemicals. Show more…
Show all steps
Your feedback will help us improve your experience
Adi S and 58 other Biology educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Multiple Choice Endospores are highly resistant to heat and chemicals and can survive unsuitable conditions for long periods of time. Select below another fact about endospores: A The genera Clostridium and Bacillus are known to have species that form endospores. B they appear pink after staining C endospores can never regrow D endospores are a method of reproduction
Adi S.
The next day, after a good night's sleep, you perform the Gram stain correctly, and confirm your original result of the isolate itself, with both controls staining correctly. Whew! You now decide to proceed to the endospore stain. What advantages do endospores confer for the bacteria that are able to form them? Check all that apply. They confer resistance to heat, low nutrients, and desiccation They are critical for dispersal via wind to colonize new habitats They aid in attachment of the bacterium to surfaces They assist in reproduction, reducing replication time necessary for vegetative cells They create a thicker cell wall, leading to a more protective outer membrane They enhance pathogenicity by preventing attack by white blood cells, such as phagocytes
Why are microbes, such as Bacillus stearothermophilus, used as biological indicators? to determine Staphylococcus aureus toxin food poisoning to eliminate fungal spores to test for protozoan cysts to tell whether Escherichia coli can survive to ensure that autoclave sterilization was successful
Madhur L.
Recommended Textbooks
Biology for AP Courses
Objective Biology for NEET
Introduction to General, Organic and Biochemistry
Transcript
Watch the video solution with this free unlock.
EMAIL
PASSWORD