In the 1930s, Researchers Worked with Green Algae to Experimentally

question 62

Multiple Choice

In the 1930s, researchers worked with green algae to experimentally determine the minimum light exposure in a single flash that produced the maximal oxygen output.When the researchers calculated the amount of chlorophyll present, they found that there were 300 times more chlorophyll molecules present than would be needed to produce this amount of oxygen with a single light flash.How are these observations consistent with the way that scientists today describe the light-harvesting complex in chloroplasts?

• A) The observations explain why most chlorophyll molecules are static and not reactive inside the light-harvesting complex.
• B) The observations explain why water is the source of oxygen that is produced during the reaction taking place inside one light-harvesting complex.
• C) The observations explain how energy is transferred from the light-harvesting complex to the Calvin cycle.
• D) The observations explain how most chlorophyll molecules act as antennae to absorb photons and then redirect this energy to a single chlorophyll molecule at the center of the complex.
• E) The observations explain how light energy is ultimately converted to chemical energy within the light-harvesting complex.