Describe the litmus milk reactions that may occur when proteins are metabolized as an energy source?

Answer 1

The inability of some microorganizms to obtain their energy by way of lactose fermentation means they must use other nutritional sources such as proteins for this purpose. By means of proteolytic enzymes, these organisms hydrolyze the milk proteins, primarily casein, into their basic building blocks, namely amino acids. this digestion of proteins is accompanied by the evolution of large quantities of ammonia, resulting in an alkaline pH in the medium. The litmus turns deep purple in the upper portion of the tube, while the medium begins to lose body and produces a translucent, brown, wheylike appearance as the protein is hydrolyzed to amino acids.

Answer 2

This occurs in proteolysis where microorganisms hydrolyze the milk proteins, primarily casein, into their basic building blocks (amino acids). This digestion of proteins is accompanied by the evolution of large quantities of ammonia, resulting in an alkaline pH in the medium.