Samples taken from a combination of biological molecules were tested. After iodine in potassium iodide solution had been added to one sample, the mixture changed to black. The biuret test was then done on a different sample, and the mixture became purple. Which biological molecules were present in the mixture?
- Aamylase and starch
- Bcellulose and starch
- Cphospholipid and cellulose
- Dstarch and phospholipid