Question

which of the following media contain(s) protein as a substrate for an exoenzyme?
t - soy agar
starch agar
skim milk agar
spirit blue

Explanation:

• T - soy agar: Contains soy proteins which can act as a substrate for exoenzymes (like proteases).
• Starch agar: Contains starch (a carbohydrate), not protein.
• Skim milk agar: Skim milk has casein (a protein). Casein can be a substrate for proteolytic exoenzymes.
• Spirit Blue: Is used for lipid hydrolysis detection (lipids are the substrate, not proteins).

Answer:

T - soy agar, Skim milk agar