Question

Microaerophilic bacteria are those which require
A.21 % oxygen for growth
B. low levels of oxygen for growth (lesser than O2 present in atmosphere)
C. oxygen for activation of enzymes
D. none of the above

Answer 1

I think the correct answer is option C.
Microaerophilic bacteria needs oxygen for activation of enzymes.
Hope it helps!

Answer 2

Answer:

Microaerophilic bacteria require low oxygen levels for growth (lesser than O2 present in atmosphere).

Explanation:

• Microorganisms that need conditions with lower concentrations of dioxygen than those found in the atmosphere (i.e. 21 percent O2; normally 2-10 percent O2) are known as microaerophiles.
• According to a more stringent interpretation, the microorganism must be obliged to comply with this criterion.
• Many microaerophiles are also capnophiles, necessitating a high carbon dioxide content (e.g. 10 percent CO2 in the case of Campylobacter species).
• When compared to other categories, the original definition of a microaerophile has been challenged for being both excessively narrow and insufficiently accurate. Microbes that can breathe oxygen "under microoxic conditions by employing high-affinity terminal oxidase" have been given the more general label "microaerobe."

Option (B) is correct.

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