Question

geranium leaves will be prepared by paper clipping either black paper, or colored filters to the leaves. the leaves will then be boiled and tested with iki. if starch has been produced by the leaf, what will we see? a) the portion of the leaf where starch has been produced will turn red. b) the portion of the leaf where starch has been produced will turn black. c) the portion of the leaf where starch has been produced will turn amber. d) the portion of the leaf where starch has been produced will turn green.

Explanation:

Iodine - potassium iodide (IKI) solution is used to test for starch. Starch reacts with IKI to form a deep - blue or black color complex. This is a well - known biochemical test result in plant physiology experiments related to photosynthesis and starch production.

Answer:

B. The portion of the leaf where starch has been produced will turn black.