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