In this lab, a test was conducted to determine how the relative redox activity of chloroplasts from spinach leaves, which were performing photosynthesis, would change when in the presence or absence of light. To observe these changes in redox activity, the chloroplasts were exposed to DCPIP, a chemical that changes color according to such activity. By determining the redox activity of the chloroplasts, it could then be inferred which chloroplasts were photosynthesizing more actively than others. Redox activity, otherwise known as oxidation-reduction reactions, is the loss or gain of electrons. These two reactions, where electrons are lost through oxidation and gained as a result of reduction, are always coupled together.…