Proteins 1

Question 1

nonpolar amino acids

Answer 1

G
A
V
L
I
M
W
F
P

Question 2

polar amino acids

Answer 2

S
T
C
Y
N
Q

Question 3

acidic amino acids

Answer 3

E
D

Question 4

basic amino acids

Answer 4

K
R
H

Question 5

which amino acid has different hydrophobicity properties based on its charge

Answer 5

Histidine

Question 6

pKa values of the acids

Answer 6

4.4

Question 7

pKa value of Histidine

Answer 7

6

Question 8

pKa value of cysteine

Answer 8

8.5

Question 9

pKa value of tyrosine and lysine

Answer 9

10

Question 10

pKa value of arginine

Answer 10

12

Question 11

the higher the pKa value

Answer 11

the harder it is to remove a proton

Question 12

pKa values are heavily affected by their

Answer 12

environment

Question 13

conformations of proteins can change based on

Answer 13

pH and metals added

Question 14

antibodies can only bind at

Answer 14

neutral pH

Question 15

plant viruses are stable at

Answer 15

low pH

Question 16

at neutral pH plant viruses

Answer 16

fall apart and release RNA into the cell

Question 17

amino acids are connected to each other via

Answer 17

peptide bonds

Question 18

the peptide bond cannot rotate and therefore

Answer 18

holds 6 atoms in a plane

Question 19

the side chains will limit the rotations about

Answer 19

psi and phi

Question 20

limitations of backbone rotations can be shown in

Answer 20

Ramachandran plots

Question 21

glycine is known as

Answer 21

a helix breaker

Question 22

proline is known as a

Answer 22

conformation breaker

Question 23

5 types of interactions that hold proteins together

Answer 23

hydrogen bonds
hydrophobic interactions
van der waals
disulfide bridges
ionic bonds

Question 24

hydrophobic interactions occur when

Answer 24

nonpolar (hydrophobic) amino acids associate with each other and cluster together to hide from water

Question 25

van der waals forces are

Answer 25

weak attractions between atoms due to oppositely polarized electron clouds.

Question 26

proteins are made up of

Answer 26

portions with increasing organization

Question 27

primary structure

Answer 27

amino acid sequence

Question 28

secondary structure

Answer 28

angels and structure dictated by the amino acid composition

Question 29

motif

Answer 29

portion of a protein that is repeated in other proteins

Question 30

domain

Answer 30

portion of a protein that is physically separate and often has a particular function

Question 31

quaternary/tertiary structure

Answer 31

domains and subunits come together to make the full structure