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Proteins Lab Quiz

Total questions: 35

Worksheet time: 16mins

Name
Class
Date
1.

Protein found in milk

a)

Casein

b)

Bean protein

c)

Myoglobin

d)

Gluten

2.

Protein found in egg

a)

Gluten

b)

Albumin

c)

Bean protein

d)

Casein

3.

Protein found in flour

a)

Albumin

b)

Myoglobin

c)

Gluten

d)

Casein

4.

The hydrophilic portion of casein

a)

Alpha casein

b)

Beta casein

c)

Kappa casein

d)

Omega casein

5.

It is the pH at which an amino acid solution has no net charge because an equal number of positive and negative charges are present

a)

Isoelectric point

b)

Dielectric constant

c)

Acidic pH

d)

Basic pH

6.

Gluten is a mixture of two proteins, _______ and gliadin

a)

Glutein

b)

Glutenin

c)

Gluten

d)

Glutin

7.

Test used to check the removal of starch

a)

Protein test

b)

Iodine test

c)

Sodium test

d)

Phosphorous test

8.

This test gives red positive reaction, indicating the presence of arginine.

a)

Biuret test

b)

Lieberman test

c)

Millon's test

d)

Sakaguchi test

9.

This test gives red color, indicating the presence of cysteine.

a)

Xanthoproteic test

b)

Sodium nitroprusside

c)

Hopkin's cole

d)

Ninhydrin test

10.

This test gives flesh to red or brick red complex with mercurous nitrate in HNO3, indicating the presence of AA with phenol group and Tyrosine

a)

Lead acetate test

b)

Sakaguchi test

c)

Millon's test

d)

Pauly diazo test

11.

This test gives black precipitate, indicating the presence of methionine, cysteine, cystine

a)

Sullivan test

b)

Biuret test

c)

Lead acetate test

d)

Sakaguchi test

12.

This test gives deep blue color to violet or purple, indicating the presence of free amino group.

a)

Millon's test

b)

Biuret test

c)

Follin's reaction test

d)

Ninhydrin test

13.

This type of protein hydrolysis is used to determine the presence of tryptophan

a)

Acid hydrolysis

b)

Alkaline hydrolysis

c)

Enzymatic hydrolysis

14.

This type of protein hydrolysis is used to determine the presence of glutamine and asparagine.

a)

Acid hydrolysis

b)

Alkaline hydrolysis

c)

Enzymatic hydrolysis

15.

This type of protein hydrolysis is used to determine the presence of cystine, cysteine, methionine, and tyrosine.

a)

Acid hydrolysis

b)

Alkaline hydrolysis

c)

Enzymatic hydrolysis

16.

It is the matted mass of heated flocculated protein

a)

Flocculation

b)

Coagulation

17.

The following are denaturing agents of proteins, EXCEPT

a)

Heat

b)

Ultraviolet radiation

c)

Reducing agents

d)

Water

18.

The following describes tannic acid, EXCEPT

a)

used as an oral medicine for leukorrhea

b)

has astrigent effects

c)

used as flavoring agents

d)

orally and topically used for bleeding, chronic diarrhea, dysentery, bloody urine, painful joints, persistent coughs, and cancer.

19.

The best concentration of alcohol in order to have a greater germicidal effect

a)

50%

b)

40%

c)

70%

d)

95%

20.

Product formed by catalase - H202 reaction

a)

Water + oxygen bubbles

b)

Water + catalase

c)

catalase + oxygen bubbles

d)

oxygen bubbles + hydrogen peroxide

21.

The region of an enzyme where substrate molecules bind and undergo a chemical reaction.

a)

Energetic site

b)

Active Site

c)

Construction site

d)

Substrate site

22.

Indicator used in amylase test

a)

Amylase solution

b)

Iodine solution

c)

NaCl solution

d)

Starch solution

23.

Enzyme responsible for hydrolyzing starch

a)

Amylase

b)

Catalase

c)

Bromelain

d)

Papain

24.

Optimum temperature for the enzymes.

a)

37 degrees celsius

b)

42 degrees celsius

c)

15 degrees celsius

d)

39 degrees celsius

25.

Chemical formula for Hydrogen peroxide

a)

H2O2

b)

H20

c)

CO2

d)

COOH

26.

Used of starch in the amylase test

a)

Enzyme

b)

Activator

c)

Indicator

d)

Substrate

27.

Meaning of TCA

a)

Tricarbonic Acid

b)

Take Care Always

c)

Trichloroacetic acid

d)

Tricarboxylic acid

28.

Observable result when hydrogen peroxide was added to the liver extract

a)

Formation of bubbles

b)

Formation of cake

c)

Formation of balloons

d)

Formation of liver

29.

The following are the uses of papain except:

a)

For parasitic worms

b)

For Inflammation

c)

Meat tenderizers

d)

None of the choices

30.

Salivary amylase works best at

a)

6.7 - 7.0

b)

5.3 - 5.5

c)

7.7 - 8.0

d)

7.4 - 7.7

31.

Iodine color if there is presence of glucose

a)

Blue Black complex

b)

Yellow red

c)

Green

d)

Pink

32.

Percent of starch used in amylase test

a)

5%

b)

1%

c)

6%

d)

3%

33.

An increase in temperature results in :

a)

Increase in speed of enzyme activity

b)

Increase in concentration of enzyme for enzymatic activity

c)

Decrease in the velocity of the reaction

d)

Inhibition of enzyme substrate interaction

e)

All of the choices

34.

Enzyme used for destruction of agua oxigenada

a)

Catalase

b)

Amylase

c)

Bromelain

d)

Papain

35.

Buffer solutions were maintained at what temperature?

a)

37 degrees celsius

b)

38 degrees celsius

c)

37 degrees fahrenheit

d)

38 degrees fahrenheit