The Sulfolobus Species Maintains an Internal PH ________ That of Its

Question

The Sulfolobus species maintains an internal pH ________ that of its habitat.
A) equivalent to
B) higher than
C) lower than
D) variable enough that it cannot be measured against
E) not determined to be different to

Accepted Answer

The Sulfolobus species is an example of acidophilic microorganisms which thrive in acidic conditions. The pH of their natural habitats like hot springs or geysers is usually low, around pH 2 to 4. Sulfolobus has evolved to maintain its internal pH higher than the surrounding environment to prevent the harmful effects of proton influx. Therefore, the internal pH of Sulfolobus is higher than that of its habitat.