A test to determine whether photosynthesis has taken place or not has been developed. This test involves destarching the plant, providing the plant with all of its requirements and finally, testing the plant to see whether it has produced starch. In the following test, starch was tested for. As a result, foods that contain starch such corn starch, bread and potato were used. As a control, foods that definitely do not contain starch, such as boiled egg white and white chalk. In addition, unknown foods, such as pasta, and apple, were tested. In order to carry out the test, a solution of half a spatula of the different foods were made in a test tube of water. In order to taste for starch, iodine solution, which is brown in colour, is used. When foods that contain starch are tested using the iodine solution, they turn blue-black or purple. However, when the presence of starch is not detected, the foods tested for take on the colour of the iodine solution. What colour would the pasta become?