Cellulose and starch

What is cellulose composed of?

• alpha glucose linked by 1-4 glycosidic bonds

• beta glucose linked by 1-6 glycosidic bonds

• β-glucose linked by 1-4 glycosidic bonds

• neither

Main role of starch polymer is

By which reaction are glycosidic bonds broken?

• condensation reaction

• neither

• both

• hydrolysis reaction

What is the shape of the amylose polymer?

• networked

• straight chain

• helical

• branched

What is the same in starch and cellulose?

• same building blocks (monomers)

• helical shape

• same properties

• same role in nature

What is another purpose/role of starch in nature?

• structural support in plant cells

• storage of water

• seed germination

• internal support in plant cells

What is amylopectin composed of?

• alpha glucose linked by 1-4 glycosidic bonds

• beta glucose linked by 1-6 glycosidic bonds

• alpha glucose linked by 1-4 and branched by 1-6 glycosidic bonds

• alpha glucose linked by 1-6 glycosidic bonds

How many molecules are branched in amylopectin?

• 1 in 15

• 1 in 20

• 1 in 25

• 1 in 30

The shape of cellulose is

Main difference between alpha glucose and beta glucose molecule is in

• size

• shape

• arrangement on -OH groups on C1 and C4 atoms

• arrangement on -OH groups on C1 and C6 atoms