Amino Acids

Question 1

Natural Occurring Amino Acids

Answer 1

L- Amino acid

Question 2

Amino Acids made up of

Answer 2

1. Amine functional group
2. Carboxylic functional group
3. Side chain
   -Nonpolar (hydrocarbons)
   -Polar (Alcohols, amides, thiols)
   -Acidic/Basic (carboxylic acids, amines)

Question 3

D- Amino Acid

Answer 3

Amine group is on:
Right side (Fischer projection)
or
Dash on bond-angle depiction

Question 4

L- Amino Acid

Answer 4

Amine group is on:
Left side (Fischer projection)
or
Wedge on bond-angle depiction

Question 5

Termini

Answer 5

N-terminus: beginning amine functional group

C-terminus: ending carboxylic acid functional group

Question 6

Type of Linkage in Peptides

Answer 6

Peptide bond (amide bond)

Question 7

Cyclic Peptide (# of Residues)

Answer 7

Number of residues/amino acids is equal to # peptide bonds (amide bond)

Question 8

Acyclic Peptide (# of residues)

Answer 8

Number of residues/amino acids is equal to # peptide bonds (amide bond) + 1

Question 9

Primary Structure

Answer 9

Sequence of amino acids

Question 10

Secondary Structure

Answer 10

Fixed arrangement of polypeptide backbone
(stabilized by hydrogen bonding)

-Alpha helix
-Beta sheet

Question 11

Tertiary Structure

Answer 11

Unique 3-D shape

Question 12

Quaternary Structure

Answer 12

Arrangement of multiple tertiary structures(subunits)