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Aerobic and Anaerobic Organisms Quiz

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Questions and Answers

What type of bacteria are destroyed by oxygen?

Microaerophiles
Facultative anaerobes
Obligate aerobes
Obligate anaerobes (correct)

Which type of bacteria have the ability to neutralize toxic by-products of oxygen metabolism?

Microaerophiles
Obligate anaerobes
Obligate aerobes
Facultative anaerobes (correct)

In the presence of oxygen, which type of bacteria partially neutralizes toxic by-products?

Obligate aerobes
Facultative anaerobes
Microaerophiles (correct)
Obligate anaerobes

What is the characteristic of obligate aerobes regarding the breakdown of toxic by-products of oxygen metabolism?

They fully neutralize all toxic by-products (B) Signup and view all the answers

Which type of bacteria is most vulnerable to the toxic effects of oxygen?

Obligate anaerobes (A) Signup and view all the answers

Why are obligate anaerobes destroyed by oxygen?

Due to the absence of enzymes to neutralize toxic by-products of oxygen metabolism (A) Signup and view all the answers

What distinguishes facultative anaerobes from aerobes?

Facultative anaerobes can survive in both anaerobic and aerobic conditions (C) Signup and view all the answers

What enzyme is essential for aerotolerant anaerobes to partially neutralize toxic by-products of oxygen metabolism?

Catalase (C) Signup and view all the answers

What characteristic helps microaerophiles thrive in low oxygen conditions?

Possession of superoxide dismutase (SOD) enzymes (A) Signup and view all the answers

Why are aerobes and facultative anaerobes less vulnerable to oxygen toxicity compared to obligate anaerobes?

They possess both superoxide dismutase (SOD) and catalase or peroxidase enzymes (C) Signup and view all the answers

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