carbohydrates

Question 1

Describe a biochemical test to show that raffinose solution contains a
non-reducing sugar.

Answer 1

-add HCL, heat and neutralise
- add Benedict’s and heat
-should form red precipitate

Question 2

A student carried out the Benedict’s test. Suggest a method, other than
using a colorimeter, that this student could use to measure the quantity of
reducing sugar in a solution.

Answer 2

filter and dry precipitate weigh mass

Question 3

uncertainty percentage

Answer 3

uncertainty/ value

Question 4

2 advantages of starch

Answer 4

branched making it compact
insoluble so it doesn’t affect water potential

Question 5

Describe the structure of glycogen.

Answer 5

polysaccharide joined by glycosidic bonds