Amino Acids

Question 1

Zwitterions

Answer 1

molecules that have both a positive and negative charge, the overall charge is neutral

Question 2

Amino Acid Titration Curve

Answer 2

shows pH dependance of the charge of an amino acid,
pH on x axis
net charge on y axis

Question 3

pI (isoelectric point)

Answer 3

the pH at which an amino acid or protein has not net charge,

Question 4

calculating pI value

Answer 4

average the pka values of the carboxyl and amino groups,

Question 5

ionizable amino acids

Answer 5

aspartic acid (Asp), glutamic acid (Glu), lysine (Lys), arginine (Arg), histidine (His), cystine (Cys),

Question 6

Peptide Bond Formation

Answer 6

condensation reaction between carboxyl group of one amino acid and amino group of another amino acid, with the release of a water molecule,

Question 7

Reverse of Peptide Bond formation

Answer 7

hydrolysis reaction through the addition of a water molecule, releases individual amino acids,

Question 8

N-terminus

Answer 8

end of the chain with a free amino group, peptide chain numbering starts there, affects molecule polarity,

Question 9

C-terminus

Answer 9

end of the chain that has a free carboxyl group, affects molecule polarity,

Question 10

Amino Acids

Answer 10

building blocks of polypeptides, 9 essential amino acids,

Question 11

Amino Acid 1

Answer 11

Valine
val
V
essential
non-polar

Question 11

AA general structure

Answer 11

carboxylic acid + amino group with an R group, the R group classifies the amino acid

Question 12

Amino Acid 2

Answer 12

Alanine
ala
A
dispensable
non-polar

Question 13

Amino Acid 3

Answer 13

Isoleucine
ile
I
essential
non-polar

Question 14

Amino Acid 4

Answer 14

Arginine
arg
R
conditional
+charged

Question 15

Amino Acid 5

Answer 15

Serine
set
S
dispensable
polar

Question 16

Amino Acid 6

Answer 16

Histidine
his
H
essential
+charged

Question 17

Amino Acid 7

Answer 17

Proline
pro
P
conditional
non-polar

Question 18

Amino Acid 8

Answer 18

Glycine
gly
G
conditional
non-polar

Question 19

Amino Acid 9

Answer 19

Methionine
met
M
essential
non-polar

Question 20

Amino Acid 10

Answer 20

Lysine
lys
K
essential
+charged

Question 21

Amino Acid 11

Answer 21

Leucine
leu
L
essential
non-polar

Question 22

Amino Acid 12

Answer 22

Glutamine
gln
Q
conditional
polar

Question 23

Amino Acid 13

Answer 23

Glutamate
glu
E
dispensable
-charged

Question 24

Amino Acid 14

Answer 24

Cysteine cys C conditional polar

Question 25

Amino Acid 15

Answer 25

Threonine the T essential polar

Question 26

Amino Acid 16

Answer 26

Aspartate asp D dispensable -charged

Question 27

Amino Acid 17

Answer 27

Asparagine asn N dispensable polar

Question 28

Amino Acid 18

Answer 28

Tryptophan trp W essential non-polar

Question 29

Amino Acid 19

Answer 29

Tyrosine tyr Y conditional polar

Question 30

Amino Acid 20

Answer 30

Phenylalanine phe F essential non-polar

Question 31

Acidic Amino Acids

Answer 31

aspartate (D) and Glutamate (E)

Question 32

Basic Amino Acids

Answer 32

Lysine (K), Arginine (R), Histidine (H)

Question 33

Nonpolar Amino Acids

Answer 33

Glycine, Alanine, Valine, Leucine, Isoleucine, Proline, Methionine, hydrophobic,

Question 34

Polar Amino Acids

Answer 34

Threonine, Tyrosine, Serine Cystine, Asparagine, Glutamine, hydrophilic,

Question 35

Aromatic Amino Acids

Answer 35

tryptophan (W), tyrosine (Y), Phenylalanine (F), histidine (H), transmembrane proteins

Question 36

Side Chain pka ASP

Answer 36

3.5

Question 37

Side Chain pka GLU

Answer 37

4

Question 38

Side Chain pka LYS

Answer 38

10.5

Question 39

Side Chain pka ARG

Answer 39

12.5

Question 40

pH>pI

Answer 40

negative charge

Question 41

Side Chain pka HIS

Answer 41

6

Question 42

pH

Answer 42

positive charge

Question 43

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Answer 43

Glutamate (acid) Aspartate (acid) Cysteine (sulfur) Methionine (sulfur) Tryptophan (aromatic) Tyrosine (aromatic) Phenylalanine (aromatic) Lysine (basic) Arginine (basic) Histidine (basic) Glutamine (polar) Asparagine (polar) Serine (polar) Threonine (polar) Glycine (non-polar) Alanine (non-polar) Valine (non-polar) Isoleucine (non-polar) Leucine (non-polar) Proline (non-polar)

Question 44

Glutamine Q mnemonic

Answer 44

glutamine call is Q tamine