biochemical tests

Question 1

describe biochemical test for starch

Answer 1

• add iodine
• positive result = orange to blue/ black

Question 2

describe biochemical test for reducing sugar

Answer 2

• add benedicts reagent and heat
• positive test= turns from blue to green/yellow/orange/brick red
• (more red= higher concentration of reducing sugar)

Question 3

why does colour change occur at the top of solution first