Answer:
The correct answer is - amino acid.
Explanation:
If some organism can not utilize lactose or other carbohydrates, have to solely depend on proteins, an amino acid in a media. Pseudomonas aeruginosa, a non-fermenter is a perfect example of such an organism.
P. aeruginosa is not able to use carbohydrates therefore they use amino acid which causes turbidity in the experiment and deamination leads to form a weak base NH3 that makes medium alkaline.
