Day 6

Question 1

does size of peptide impact importance

Answer 1

no

Question 2

contain permanently associated chemical components

Answer 2

conjugated proteins

Question 3

non amino acid part of conjugated protein

Answer 3

prosthetic group

Question 4

proteins containing lipids

Answer 4

lipoproteins

Question 5

proteins containing sugars

Answer 5

glycoproteins

Question 6

proteins containing specific metals

Answer 6

metalloproteins

Question 7

covalent bonds linking amino acid residues in a polypeptide chain

Answer 7

primary structure

Question 8

recurring structural patterns

Answer 8

secondary structure

Question 9

3D folding of polypeptide

Answer 9

tertiary structure

Question 10

2+ polypeptide subunits

Answer 10

quaternary structure

Question 11

describes spatial arrangement of the main chain atoms in a segment of a polypeptide chain

Answer 11

secondary structure

Question 12

common types of secondary structure

Answer 12

alpha helix, beta conformation, beta turn, random coils

Question 13

how many atoms of the peptide group lie in a single plane

Answer 13

6

Question 14

what prevents rotation

Answer 14

partial double bond character of c-n peptide bond

Question 15

simplist arrangement, max number of hydrogen bonds

Answer 15

alpha helix

Question 16

backbone wound around an imaginary longitudinal axis

Answer 16

alpha helix

Question 17

r groups protrude in or out of the backbone in an alpha helix

Answer 17

out of

Question 18

r groups protruding away from helical backbone

Answer 18

right handedness

Question 19

most common handedness of alpha helix

Answer 19

right handed

Question 20

less stable, not observed in proteins

Answer 20

left handedness

Question 21

gives significant stability in amino terminus

Answer 21

intrahelical hydrogen bonds

Question 22

what affects the stability of alpha helix

Answer 22

amino acid sequene

Question 23

what can destabilize the alpha helix

Answer 23

charge, size, and shape of r groups

Question 24

what can stabilize alpha helix

Answer 24

formation of ion pairs and hydrophobic effect

Question 25

small electric dipoles in each peptide bond align thru what

Answer 25

hydrogen bonds

Question 26

negatively charged amino acids often found where

Answer 26

near the NH3+ terminus

Question 27

positively charged amino acids often found near where

Answer 27

near the COO- terminus

Question 28

introduces destabilizing kink in helix

Answer 28

proline

Question 29

what part of proline is part of rigid rign

Answer 29

nitrogen

Question 30

high conformational flexibility, take up coiled strucutes

Answer 30

glycine

Question 31

backbone extends into a zigzag, what conformation

Answer 31

beta conformation

Question 32

single protein segment

Answer 32

beta strand

Question 33

several stands in beta conformation side by side

Answer 33

beta sheet

Question 34

adjacent polypeptide chains in a beta sheet can be what

Answer 34

antiparallel or parallel

Question 35

opposite orientation

Answer 35

antiparallel

Question 36

which occurs more freq, parallel or anitparallel

Answer 36

antiparallel

Question 37

same orientation

Answer 37

parallel

Question 38

connect ends of two adjacent segments of an antiparallel beta sheet

Answer 38

beta turn

Question 39

how many residues involved in beta turn

Answer 39

4

Question 40

hydrogen bond forms between what in a beta turn

Answer 40

first and fourth residue

Question 41

which two amino acids ovten occur in beta turns

Answer 41

glycine and proline