Amino acids, amines, amides, chirality

Question 1

Amino acid general structure

Answer 1

C bonded to:
NH2
R group
COOH

Question 2

Amide general structure

Answer 2

C bonded to:
double bond oxygen
NH2
alkyl group

Question 3

Name the property that describes an amino acid as being both an acid and a base

Answer 3

Amphoteric

Question 4

What is an isoelectric point

Answer 4

A point where the charge of each molecule is perfectly balanced and there is no overall charge

Question 5

Amine general structure

Answer 5

N bonded to:
hydrogen
alkyl group

Question 6

Optical isomers

Answer 6

Compounds that are non-superimposable mirror images of each other.

Question 7

What is a chiral centre?

Answer 7

A carbon atom attached to 4 different groups

Question 8

Enantiomers

Answer 8

Property of optical isomers as they can not be realigned

Question 9

Significance of enantiomers

Answer 9

Same chemical properties, similar physical properties, drastically different biological properties (eg: thalidomide)

Question 10

What is a racemic mixture?

Answer 10

A mixture in which there is 50% of one optical isomer and 50% of the other optical isomer