Question

To identify the molecule that accepts CO₂ , Calvin and Benson manipulated the carbonfixation 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? a. The CO₂ acceptor concentration would decrease when either the CO₂ or light are cut off. b. The CO₂ acceptor concentration would increase when either the CO₂ or light are cut off. c. The CO₂ acceptor concentration would decrease when the CO₂ is cut off, but increase when the light is cut off. d. The CO 2 acceptor concentration would increase when the CO₂ is cut off, but decrease when the light is cut off.

Answer 1

To identify the molecule that accepts $CO_{2}$, Calvin and Benson manipulated the carbon-fixation cycle by either cutting off $CO_{2}$ or cutting off light from cultures of photosynthetic algae. They then measured the concentrations of various metabolites immediately following the manipulation. The $CO_{2}$ acceptor concentration would increase when the $CO_{2}$ is cut off, but decrease when the light is cut off.

The correct option is d.

The process through which living things absorb inorganic carbon from the atmosphere and transform it into organic molecules is known as carbon fixation. These substances are employed as chemical energy storage. For life to continue, it is a necessary process.

Calvin and Benson disrupted the carbon-fixation cycle by either removing $CO_{2}$ or removing light from cultures of photosynthetic algae in order to find the molecule that takes $CO_{2}$. Following the alteration, they evaluated the concentrations of several metabolites.

To learn more about Calvin and Benson, refer from

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