EXP #3 | Proteins

Question 1

Are comprised of amino and carboxylic acids functional groups

Answer 1

Amino Acids

Question 2

The (1) __________ and (2) __________ comprise the functional groups in a class of biologically important compounds, amino acids

Answer 2

(1) amino
(2) carboxylic acid groups

Question 3

Are polymers composed of amino acids that are linked together by a peptide bond

Answer 3

Proteins

Question 4

Proteins are (1) __________ composed of amino acids that are linked together by a (2) __________

Answer 4

(1) polymers
(2) peptide bond (amide bond)

Question 5

The complete (1) __________ of proteins yields the component (2) __________

Answer 5

(1) hydrolysis
(2) amino acids

Question 6

The (1) __________ present in amino acids and proteins react with a variety of reagents to form (2) __________

Answer 6

(1) functional groups
(2) colored products

Question 7

The color reactions have been used as basis for the __________ of proteins and amino acids.

Answer 7

quantitative estimation

Question 8

The structures of proteins are so much more __________ compared to those of carbohydrates and lipids

Answer 8

complex

Question 9

The structure of proteins are described in four different ways:

(1) __________
(2) __________
(3) __________
(4) __________

Answer 9

(1) Primary
(2) Secondary
(3) Tertiary
(4) Quaternary

Question 10

Different types of __________ between the R groups and the peptide backbone maintain protein structures

Answer 10

intermolecular forces of attraction

Question 11

Different types of intermolecular forces of attraction between the __________ and the __________ maintain protein structures

Answer 11

R groups; peptide backbone

Question 12

The biological activity of a protein depends on its __________ and __________

Answer 12

secondary and tertiary structures

Question 13

A process called (1) __________ is associated with the alteration of these structures which results in changes in (2) __________ (precipitation or coagulation) and __________

Answer 13

(1) protein denaturation
(2) physical properties; loss of biological activity

Question 14

Denaturation may be caused by the action of _______, _______, and _______

Answer 14

heat; light; chemical reagents

Question 15

The Ninhydrin test is a test for __________

Answer 15

amino groups

Question 16

The presence of a __________ is the positive result for the Ninhydrin test

Answer 16

blue or violet-colored solution

Question 17

The Biuret test is a test for __________

Answer 17

proteins

Question 18

The presence of a __________ is the positive result for the Biuret test

Answer 18

blue-violet solution

Question 19

The Sakaguchi test is a test for __________

Answer 19

arginine

Question 20

The presence of a __________ is the positive result for the Sakaguchi test

Answer 20

red-colored solution

Question 21

The Hopkins-Cole test is a test for __________

Answer 21

tryptophan

Question 22

The presence of a __________ is the positive result for the Hopkins-Cole test

Answer 22

Deep violet or purple ring

Question 23

The Heat Coagulation test is a test for __________

Answer 23

proteins (albumin & globulin)

Question 24

The presence of __________ is the positive result for the Heat Coagulation test

Answer 24

dense coagulum

Question 25

Waste generated from the following test should be disposed in metal-containing waste: (1) __________ (2) __________ (3) __________

Answer 25

(1) Biuret test (2) Hopkins-Cole test (3) Lead Sulfide test

Question 26

Waste generated from the following test should be disposed in non-halogenated waste: (1) __________ (2) __________

Answer 26

(1) Ninhydrin test (2) Heat Coagulation test

Question 27

Waste generated from the following test should be disposed in halogenated organic waste: (1) __________

Answer 27

(1) Sakaguchi test