Topic 1C - Diet and Health

Question 1

Name the type of chemical reaction that joins monosaccharides together to form an amylose molecule.

Answer 1

condensation

Question 2

Name the chemical bond that is formed between the monosaccharides in an amylose molecule.

Answer 2

1-4 glycosidic bond

Question 3

Describe one structural difference between amylose and glycogen

Answer 3

amylose is coiled while glycogen is not

Question 4

EQ. Explain two ways in which the structures of amylose and glycogen make them suitable for energy storage. (2 marks)

Answer 4

• they are compact so they can store a large amount of glucose molecules in a small volume
• they are insoluble so they wll not be affected by osmosis

Question 5

EQ. Describe the structure of starch. (5 marks)

Answer 5

• made up of alpha glucose
• consists of amylose and amylopectin
• amylose has 1-4 glycosidic bonds and amylopectin has 1-4 and 1-6 glycosidic bonds
• amylose is coiled
• amylopectin is branched