Starch

Question 1

Starch is the

Answer 1

-main storage of glucose for plants

Question 2

starch is made from

Answer 2

alpha glucose molecules bonded in 2 ways to give the polymers: amylose and amylopectin

Question 3

Amylose is a

Answer 3

-linear unbranched molecule, 1-4 glycosidic bond repeated to form a chain that coils into a helix

Question 4

Amylopectin

Answer 4

• chains of glucose monomers joined by a 1-4 glycosidic bond cross linked with a 1-6 bond and fit inside the amylose

Question 5

Testing for the presence of starch

Answer 5

-iodine solution(dissolved in aqueous potassium iodide) mixed with starch
-colour change from orange-brown to blue-black
-depending on how dark the colour is after the tests depends on how the conc of starch present