Proteins

Question 0

What does primary structure determine?

Answer 0

1 identity of protein
2 molecular structure
3 functions performed
4 molecular binding

Question 1

Analytic processes used in the laboratory

Answer 1

Chromatography
Electrophoresis
Dye binding
Light absorbance

Question 2

Properties of secondary structure

Answer 2

Strength

Flexibility

Question 3

3 structures of secondary structure

Answer 3

a-helix
B-pleated sheet
Bend conformations or turns

Question 4

It refers to overall shape or conformation of the protein molecule (known as the fold)

Answer 4

Tertiary structure

Question 5

Results from interaction of side chains

Answer 5

Tertiary structure

Question 6

What does tertiary structure determine?

Answer 6

Function

Physical and chemical properties of protein

Question 7

What stabilizes tertiary structure?

Answer 7

Hydrophobic effect
Ionic attraction
Hydrogen bonds
Disulfide

Question 8

Shape from interaction of more than one protein molecule

Answer 8

Quaternary structure

Question 9

Forces that hold together quaternary structure

Answer 9

Non-covalent (H bonds, electrostatic interaction)

Question 10

Lost of the native or naturally occurring folded structure

Answer 10

Denaturation

Question 11

Denaturation can be accomplished by action of

Answer 11

Heat
Acid
Alkali
Enzymes

Question 12

Contain peptide chains composed of only amino acids

Answer 12

Simple proteins

Question 13

Functions of globular proteins

Answer 13

Transporters
Enzymes
Messengers

Question 14

Characteristics of globular proteins

Answer 14

Symmetrical and soluble in water

Question 15

Characteristics of fibrous proteins

Answer 15

Asymmetrical
Inert
With hydrophobic R groups

Question 16

Examples of globular protein

Answer 16

Albumin
Hemoglobin
Immunoglobulin

Question 17

Examples of fibrous protein

Answer 17

Troponin

Collagen

Question 18

What are conjugated proteins?

Answer 18

Proteins that consist of a protein and prosthetic group

Question 19

It defines the characteristics of the protein (conjugated protein)

Answer 19

Prosthetic group

Question 20

Examples of conjugated proteins

Answer 20

Metalloprotein
Lipoprotein
Glycoprotein
Nucleoprotein

Question 21

Examples of metalloproteins

Answer 21

Ferritin (iron)
Cerruloplasmin (copper)
Hemoglobin
Flavoprotein

Question 22

Examples of lipoprotein

Answer 22

HDL

LDL

Question 23

Examples of glycoprotein

Answer 23

Haptoglobin

a-antitrypsin

Question 24

Example of nucleoprotein

Answer 24

Chromatin

Question 25

What is the N content of serum proteins?

Answer 25

16%

Question 26

Other term for prealbumin

Answer 26

Transthyretin

Question 27

Characteristics and properties of protein

Answer 27

1 contain nitrogen atoms 2 can be positively or negatively charged 3 isoelectric point: number of positive = number of negative groups 4 (-) : pH>pI solution and (+) : pH

Question 28

Control protein synthesis

Answer 28

Thyroxine GH Insulin Testosterone

Question 29

Control protein catabolism

Answer 29

Glucagon | Cortisol

Question 30

Degrades extracellular and intracellular proteins

Answer 30

Lysosomal pathway

Question 31

Degrades extracellular proteins

Answer 31

Cytosolic pathway

Question 32

Remove nitrogens from AA

Answer 32

Transaminations

Question 33

Products of transamination

Answer 33

Ammonia | Ketoacids

Question 34

Oxidized and converted to glucose or fat

Answer 34

Ketoacids

Question 35

Converted to urea in hepatocytes and excreted in urine

Answer 35

Ammonia