Swe chem 02 - Protein

Question 1

Amino acid formula

Answer 1

H. R. O..
N. C. C.
H. H. OH.

Question 2

Amount of amino acids

Answer 2

20

Question 3

What amino acid isn’t an optical isomer

Answer 3

Glycine

Question 4

Optical isomer

Answer 4

Chiral

Question 5

Essential amino acids

Answer 5

9 st

Valine, leucine, lysine

Question 6

R groups can be…

Answer 6

Non-polar
polar
neg. Charged
Pos. Charged

Question 7

Peptide bonds

Answer 7

H from the amino group, OH from the carboxyl group => HOH

Question 8

Zwitterion

Answer 8

Amino group is ionic, carboxyl group is ionic. Molecule is neutral

Question 9

Primary structure

Answer 9

Order of amino acids

Question 10

Secondary structure

Answer 10

Folds

Alfa helix or beta pleated

Question 11

Alpha helix

Answer 11

Tends to have small R groups

Hydrogen bonds

Question 12

Beta pleated

Answer 12

Tends to have larger R groups

Hydrogen bonds

Question 13

Tertiary structure

Answer 13

3D shape - Interaction of R groups

Hydrophobic inwards
Hydrophilic outwards

Question 14

Forces determining the tertiary structure

Answer 14

Electrostatic charges

Hydrogen bonds

Disulfic bonds (smells bad)

Question 15

Quaternary structure

Answer 15

Several chains making up one protein

Can include non- protein groups such as iron in hemoglobin (4 strands)

Question 16

General classification of shape

Answer 16

Fibrous or globular

Question 17

Fibrous

Answer 17

Strands

Question 18

Globular

Answer 18

Ball, järn, tangle

Question 19

Denaturation

Answer 19

Breakage of intermolecular bonds

Temperature
PH
Chemical interference

Question 20

Roles of protein

Answer 20

Transportation - hemoglobin…
Structure - collagen, keratin
Movement - myosin filament, muscle
Metabolism - Enzymes
Defence - antibodies
Communication - membrane ports
Hormone control - peptide (single)
Storage - Albumin