Ring Structure

Question 1

What is the type of bond within the ring structure of aldose monosaccharides?

Answer 1

Hemiacetal bond

Question 2

What is the type of bond within the ring structure of ketose monosaccharides?

Answer 2

hemiketal bond

Question 3

What is the name of a 6 member ring?

Answer 3

Pyranose

Question 4

What sugars form a 6 member ring?

Answer 4

Glucose
Galactose
Mannose

Question 5

What is the name of a 5 member ring?

Answer 5

Furanose

Question 6

What sugars form a 5 member ring?

Answer 6

Ribose
Fructose

Question 7

Define anomeric carbon

Answer 7

The carbon in hemiacetal or hemiketal bond

Question 8

If the OH is up on the anomeric carbon it is labeled ____

Answer 8

Beta

Question 9

If the OH is down on the anomeric carbon it is labelled ____

Answer 9

Alpha

Question 10

Define reducing sugar

Answer 10

The presence of an anomeric carbon allows the sugar to ‘reduce’ Benedict’s solution and turn it from blue to red

Question 11

What does a reducing sugar indicate?

Answer 11

The presence of an un-bonded anomeric carbon

Question 12

Draw the structure of B-D-Ribofuranose
Identify the anomeric carbon

Question 13

Draw the ring structure for D-Glucose
Identify the anomeric Carbon
Alpha or beta

Answer 13

Alpha

Question 14

Draw the ring structure for D-Mannose
Identify the anomeric Carbon
Alpha or beta

Answer 14

Alpha

Question 15

Draw the ring structure for D-Galactose
Identify the anomeric Carbon
Alpha or beta

Answer 15

Alpha

Question 16

Draw the ring structure for fructose
Identify the anomeric Carbon
Alpha or beta

Answer 16

Beta