Chapter 3: Amino Acids and Peptides

Question 1

AMINO ACIDS ARE THREE-DIMENSIONAL

Include an amino group and a carboxyl group, both of which are bonded to the a-carbon

Answer 1

Amino Acid

Question 2

AMINO ACIDS ARE THREE-DIMENSIONAL

NH2 functonal group

Answer 2

Amino Group

Question 3

AMINO ACIDS ARE THREE-DIMENSIONAL

–COOH functional group that disassociates to give carboxylate anion, —COO-, and a hydrogen ion

Answer 3

Carboxyl Group

Question 4

AMINO ACIDS ARE THREE-DIMENSIONAL

Amino acids are __ structures

Answer 4

Tetrahedral

Question 5

AMINO ACIDS ARE THREE-DIMENSIONAL

Bonded to a hydrogen and to the side chain group, R

Answer 5

α-carbon

Question 6

AMINO ACIDS ARE THREE-DIMENSIONAL

Side Chain group: Portion of an amino acid that determines it identity

Answer 6

Side Chain group

Question 7

AMINO ACIDS ARE THREE-DIMENSIONAL

Two stereoisomers of amino acids are designated as ____________ (common in carbohydrates) based on similarity to glyceraldehyde

Answer 7

L- and D- amino acids

Question 8

AMINO ACIDS ARE THREE-DIMENSIONAL

Molecules that differ from each other only in their configuration

Answer 8

Stereoisomers

Question 9

With exception of ________, all amino acids have at least one chiral center (the a-carbon) and **chiral center **(stereoisomers)

Answer 9

Glycerine

Question 10

A carbon attached to 4 different groups

Answer 10

Chiral Center

Question 11

Vast majority of ____________ have the L confguraton at the a-carbon

Answer 11

a-amino acids

Question 12

Proline is usually in the ________ form

Answer 12

L Form

Question 13

A group of amino acids that has nonpolar side chains

Answer 13

Nonpolar Amino Acids

Question 15

NONPOLAR AMINO ACIDS:
GAVLI ProMethTry

Answer 15

Glycine, Alanine, Valine, Leucine, Isoleucine,
Proline, Phenylalanine, Tryptophan, and methionine

Question 16

Alanine, Valine, Leucine, Isoleucine contains ____________________ group

Answer 16

Aliphatic Hydrocarbon Group

Question 17

it has an aliphatc cyclic structure

Answer 17

Proline

Question 18

In phenylalanine, the hydrocarbon group is __________

Answer 18

Aromatic