Health Safety And Nutrition F/Young Child
9th Edition
ISBN: 9781305144767
Author: MAROTZ
Publisher: Cengage
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List the five food groups shown in MyPlate. How is theimportance of eating fruits and vegetables indicated inMyPlate?
What is the protein in milk? Why is this protein precipitated when milk sours?
SPECIFY THE FUNCTIONS AND ENZYMES USED FOR PROTEIN DIGESTION
Procedure:
Peptic digestion
Prepare 4 test tubes as follows:
Tube 1 - 3 ml pepsin
Tube 2 - 3 ml of 0.4% HCl
Tube 3 - 3 ml pepsin + 1.5 ml of 0.4% HCl
Tube 4 - 3 ml pepsin + 1.5 ml of 1% Na2CO3
Add equal slices of hard-boiled egg white to each tube.
Cover and incubate at 40oC for 2 hours.
Add 4 drops of toluene and store till the next lab period.
Determine the extent of digestion by visually noting the size of the hard-boiled egg white in each tube.
Withdraw 1 ml of the supernatant liquid from each tube and place in 4 separate test tubes labelled tube 1a. 2a, 3a, 4a.
Neutralize tubes 2a& 3a with solid sodium carbonate.
To each supernatant liquid, add 1 ml of 10% NaOH and 2 drops of 1% CuSO4. Compare the colors obtained in the 4 tubes.
Place 1 ml of 0.5% peptone in a test tube and add 1 ml of 10% NaOH and 2 drops of 1% CuSO4. Compare the result of these…
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