LPT-0078
QUESTION
Proteins in milk are present in one of the following forms?
OPTIONS
(A) Soluble
(B) Colloidal
(C) Emulsion
(D) Suspension
ANSWER
(B) Colloidal
EXPLANATION
Milk proteins, especially casein, occur mainly as a colloidal dispersion in the aqueous phase; casein micelles are classic colloidal particles. Fat, by contrast, is present as an emulsion. Thus, soluble, emulsion, and suspension do not best describe the principal physical state of milk proteins, making option (B) correct.
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