27.2 Amino Acids, Amides and Chirality

Question 1

What is an alpha amino acid?

Answer 1

Amine group is attached to the alpha carbon atom - second carbon atom next to the carboxyl group

Question 2

What is the beta carbon atom?

Answer 2

Third carbon atom

Question 3

What is the gamma carbon atom?

Answer 3

Fourth carbon atom

Question 4

Reaction of the amine group

Answer 4

Reacts with acids to make salts

Question 5

Reaction of the carboxylic acid

Answer 5

React with aqueous alkalis to form salt and water
Esterification with alcohols

Question 6

Zwitterion

Answer 6

When the basic amine group can accept a proton from the carboxylic acid to form an ion with both a positive and negative charge

Question 7

Isoelectric point

Answer 7

pH at which zwitterion is formed

Question 8

How are amides formed?

Answer 8

Product of reaction between acyl chlorides and ammonia/amines

Question 9

Optical isomerism

Answer 9

Isomers that are non super imposable mirror image structures

Question 10

Chiral centre

Answer 10

Carbon atom attached to four different groups of atoms or groups of atoms

Question 11

How are optical isomers drawn?

Answer 11

As mirror images to each other