Test for the Components of Milk A. Test for Casein PROCEDURE: In two separate test tubes, place pinch of dried precipitate (casein). To the first test tube perform Biuret’s test and to the second test tube, perform Millon’s test. Observe and record the change in color.   QUESTION:  WHAT IS THE CONFIRMATORY TEST FOR EACH TUBE AND COLOR OF THEIR POSITIVE RESULT?

Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
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Test for the Components of Milk

A. Test for Casein

PROCEDURE:

In two separate test tubes, place pinch of
dried precipitate (casein). To the first test tube
perform Biuret’s test and to the second test
tube, perform Millon’s test. Observe and
record the change in color.

 

QUESTION: 

WHAT IS THE CONFIRMATORY TEST FOR EACH TUBE AND COLOR OF THEIR POSITIVE RESULT?

Expert Solution
Step 1

Casein is the major protein which is found in milk. It is present 80% by mass in the milk along with whey protein, fat, and minerals.

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