Amino acids and proteins

Question 1

main source of protein

Answer 1

muscles

Question 2

proteins in ear

Answer 2

hair cells containing myosin and actin which contracts

Question 3

protein in eyes

Answer 3

with in retinas which have cells containing opsin

Question 4

opsin

Answer 4

have tubes formed across membrane

answer to different waves of light

Question 5

opsin dependents

Answer 5

how narrow or wide pores are in cross sections

Question 6

B -blue wavelength

Answer 6

420nm

Question 7

G - green wavelength

Answer 7

530nm

Question 8

R - red wavelength

Answer 8

560nm

Question 9

protanopes

Answer 9

does not have the protein to show R

Question 10

deuteranopes

Answer 10

does not have to protein to show G

Question 11

protanomalous

Answer 11

R wavelength shifts more towards G

Question 12

deuteranomalous

Answer 12

G wavelength shifts towards R

Question 13

Protein classes

Answer 13

fibrous and globular

Question 14

fibrous uses

Answer 14

insoluble for structure, strength/protective layers
silk web
coating - secreting granules/ seeds/viruses
intracellular cytoskeleton, extracellular matrix

Question 15

globular

Answer 15

soluble - dynamic function

Question 16

dynamic functions of globular

Answer 16

enzymes
transport protein
hormones
defence - antibodies
toxins
in membrane

Question 17

diversity of proteins

Answer 17

one repeating subunit

20 different subunits

Question 18

one repeating subunit

Answer 18

unreactive and boring

such as polyethylene

Question 19

20 different subunit

Answer 19

has many different combination

Question 20

amino acids contains

Answer 20

amine
carboxylic acid
R group
central alpha carbon

Question 21

zwitterionic for

Answer 21

protonation and deprotonation

Question 22

protonation

Answer 22

amine group becomes NH3+

Question 23

deprotonation

Answer 23

carboxyl becomes COO-

Question 24

chirality

Answer 24

isomers arranged in 2 different ways

Question 25

L isomer

Answer 25

life isomer

Question 26

D isomer

Answer 26

optical/stereoisomer - less common

Question 27

example of chirality - alanine

Answer 27

L-Alanine and D-Alanine

Question 28

R groups

Answer 28

20 different side chain

Question 29

non polar - hydrophobic simplest

Answer 29

cysteine - Cys - C

methionine - Met - M

Question 30

non polar - aliphatic (branched)

Answer 30

valine - Val - V
leucine - Leu - L
isoleucine - Ile - I
cyclic - Proline - Pro - P

Question 31

other non polar

Answer 31

alanine - Ala - A
glycine - Gly - G
phenylalanine - Phe - F
Tryptophan - Trp - W

Question 32

uncharged polar -hydrophilic - OH

Answer 32

Serine - Ser - S
Threonine - Thr - T
Tyrosine - Tyr - Y

Question 33

uncharged polar - C=O NH2

Answer 33

Asparagine - Gln - Q

Glutamine - Asn - N

Question 34

-ve charged acidic

Answer 34

Aspartic acid - Asp - D

Glutamic acid - Glu - E

Question 35

+ve polar caused by N+

Answer 35

Lysine - Lys - K
Arginine - Arg - R
Histidine - His - H

Question 36

Cysteine

Answer 36

sometimes polar

weak acid

Question 37

peptide bond

Answer 37

join carboxyl group and amine group by condensation reaction

Question 38

during translation of mRNA

Answer 38

ribosomes provides site for reaction

Question 39

breaking peptide bond

Answer 39

using protease or extreme condition

Question 40

polypeptide

Answer 40

sequence of residue

Question 41

how sequence is described as

Answer 41

N to C

Question 42

estimate molecular mass

Answer 42

no. residue * 110

Question 43

structure name - primary

Answer 43

sequence

Question 44

structure name - secondary

Answer 44

local

Question 45

structure name - tertiary

Answer 45

whole proteins

Question 46

structure name - quaternary

Answer 46

different proteins