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PROTEINS: ISOLATION AND QUALITATIVE COLOR REACTION

Total questions: 10

Worksheet time: 4mins

Name
Class
Date
1.

A naturally occuring, unbranched polymer in which the monomer units are amino acids?

a)

Carbohydrates

b)

Proteins

c)

Lipids

d)

Nucleic Acids

2.

Defatted milk

a)

Skimmed

b)

condensed

c)

Whole

d)

Evaporated

3.

The main protein in milk

a)

Ovalbumin

b)

Casein

c)

Albumin

d)

Myoglobin

4.

pH at which charges of amino acids in proteins are neutral

a)

isoelectric point

b)

Salting out

c)

salting in

d)

neutral pH

5.

casein is a/an

a)

Sulphur containing

b)

Aminoprotein

c)

Phosphoprotein

d)

Albumin

6.

The proteins found in egg

a)

ovalbumin

b)

lactalbumin

c)

serum albumin

d)

casein

7.

Ammonium sulfate are used in high concentration for protein isolation causing precipitation, this phenomenon is known as

a)

salting in

b)

salting out

8.

Protein in wheat flour

a)

gluten

b)

whey

c)

albumin

d)

myoglobin

9.

When the washing is treated with iodine, this is an indication that gluten is not yet isolated

a)

Blue-violet to black color

b)

Retained iodine color

c)

brown color

d)

light yellow-orange color

10.

The monomer protein isolated in meat

a)

Hemoglobin

b)

Myoglobin

c)

Gluten

d)

Casein