Proteins lab

Question 1

Water-soluble proteins

Answer 1

Albumin

Question 2

substances that contain albumin

Answer 2

albuminoids

Question 3

2 substances in gluten

Answer 3

glutenin and gliadin

Question 4

What color ppt indicats the presence of starch in the isolation of gluten?

Answer 4

blue

Question 5

what color ppt indicates the removal of starch in the isolation of gluten?

Answer 5

yellow

Question 6

test that detects peptide bonds, it measures the amount of proteins present

Answer 6

Biuret test

Question 7

Diotrowski’s test

Answer 7

Biuret test

Question 8

What color ppt indicates a presence of peptide bonds in the biuret test?

Answer 8

blue to pink

Question 9

test used to detect amino acids or proteins, specific test for arginine

Answer 9

Sagakuchi

Question 10

What is the positive color ppt of Sakaguchi’s test

Answer 10

red colored complex

Question 11

what reagent is used in the isolation of bean protein

Answer 11

acetic acid

Question 12

test used for the detection of tyrosine or phenol-containing compound

Answer 12

millon’s test

Question 13

what is the positive color ppt of millon’s test

Answer 13

red or pink ppt

Question 14

used to detect the presence of indole ring containing amino acid

Answer 14

hopkins-cole test

Question 15

positive ppt of hopkins-cole test

Answer 15

purple ring

Question 16

a biochemical test for the detection of amino acids, known as lead sulfide test

Answer 16

lead acetate test

Question 17

test used for the detection of amino acids containing phenolic or indolic groups )aromatic-amino acids)

Answer 17

Xanthoproteic test

Question 18

positive color ppt of xanthoproteic test

Answer 18

dark yellow or orange color