Do Plants Need Sunlight To Make Sugar?Photosynthesis is the cellular process by which light energy isconverted into chemical energy. Starch is a form of stored cel-lular energy in plants which is consumed during respiration.ObjectiveUse an iodine solution to detect starch production in greenleaves.Materials—a coleus plant—black construction paper—paper clips—scissors—tweezers—a hot plate —a small pot for boiling water —rubber gloves—iodine solution, diluted 20 parts water to one part iodine—100 ml of ethyl alcohol —beakers—a Petri dishSafety Notice:All applicable laboratory safety rules must be followed. Students shouldnot perform any experimental activity without the teacher’s supervision and express permission. Students must follow safety guidelines and wear appropriate protective gear.Procedure 1. Select a coleus leaf for study and make a sketch of it in thebox below, labeling which parts are colored green andwhich show only the pink pigments.
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