Biology Food Lab Application Questions [Macromolecules]

7) A drop of iodine accidently falls on a piece of paper. Predict the colour change, if any, and provide an explanation of your prediction.

8) A student heats a test tube containing a large amount of proteins and biuret reagent. She notices a colour change from violet to blue. Explain why heating causes a colour change.

7) black because iodine tests for starches, and i believe that paper is made out of cellulose which is a a type of starch?

8) heating causes change because of chemical reactions?