Lactobacillus Grows Optimally at __________ PH

Question

Lactobacillus grows optimally at __________ pH.
A)slightly acidic
B)neutral
C)slightly alkaline
D)very acidic

Accepted Answer

Lactobacillus is classified as an acidophile, which means it grows optimally at a slightly acidic pH range of 5.5-6.5. This is because Lactobacillus produce lactic acid by fermenting sugars, lowering the pH of the environment. A neutral or alkaline pH range would be unfavorable for the growth of Lactobacillus. A very acidic pH range may inhibit the growth of Lactobacillus, depending on the specific strain.