To identify the molecule that accepts CO2, Calvin and Benson manipulated the carbon-fixation cycle by either cutting off CO2 or cutting off light from cultures of photosynthetic algae. They then measured the concentrations of various metabolites immediately following the manipulation. How would these experiments help identify the CO2 acceptor?   Select one: a. The CO2 acceptor concentration would decrease when the CO2 is cut off, but increase when the light is cut off. b. The CO2 acceptor concentration would increase when the CO2 is cut off, but decrease when the light is cut off. c. The CO2 acceptor concentration would decrease when either the CO2 or light are cut off. d. The CO2 acceptor concentration would increase when either the CO2 or light are cut off.

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Photosynthesis

Plants have a capacity that we humans can only imagine— the ability to produce food from sunlight. Sure, we can prepare some dishes that we can savor on, but it become possible because of the plants (as they serve as a producers of all the raw materials required). Photosynthesis is the method of assembling carbohydrates with the aid of sunlight.