REQ.PRAC, Carboydrates, Lipids, Proteins

Question 1

Method

Answer 1

1) sugars=ass Benedict’s reagent and heat in water bath for 2 mins, will turn red
2) starch= add IODINE SOLUTION, will turn blue-black
3) protein= add biuret reagent, will turn purple

Question 2

Considerations mistakes and errors

Answer 2

• DONT boil for too long because any starch present might break down into sugar and test positive
• purple might be hard to see so hold test tube in front of a sheet of white paper