Stereoisomers

Question 1

Define stereoisomers

Answer 1

Question 2

The number of possible stereoisomers of a carbohydrate is determined by what?

Answer 2

By the formula of the number of asymmetric carbon atoms

Question 3

What are the types of isomerism

Answer 3

D and L isomerism
Optical isomers
Epimers
Diastereoisomers
Aldo-keto isomers
Anomers

Question 4

Define D and L isomerism

Answer 4

The D and L forms of sugar are mirror images of each other, with reversed configurations at the penultimate carbon

Question 5

What will be the OH position for the D and L isomerism

Answer 5

Question 6

D sugars are what?

Answer 6

Naturally occurring sugars and the body can metabolize only D sugars

Question 7

Explain optical isomers

Answer 7

Question 8

Explain epimers

Answer 8

Two sugars that differ from one another only in configuration around a single Carbon atom

Question 9

Give examples of epimers

Answer 9

Glucose and galactose - C4
Glucose and mannose - C2

Question 10

Explain diastereoisomers

Answer 10

Question 11

What’s the difference between diastereomers and enantiomers ?

Answer 11

Diastereomers have different physical properties, like melting and boiling point, solubility, and they do not rotate plane-polarized light in equal but opposite directions

Question 12

Explain the Aldo - keto isomers

Answer 12

Question 13

Explain Anomers

Answer 13

Question 14

D glucose is what

Answer 14

Dextrorotatory

Question 15

D fructose is what

Answer 15

Levorotatory