Why carbon-dioxide is a restrictive factor of photosynthesis

Question

Why is the carbon-dioxide concentration a restrictive factor of the photosynthesis method? Whenever the carbon-dioxide concentration is raised indefinitely is photosynthesis as well raised indefinitely?

Answer 1

The availability of carbon-dioxide is a restrictive factor for the photosynthesis method since this gas is a reagent of the reaction. As enzymes catalyze the building of organic molecules with carbon atoms from carbon-dioxide photosynthesis stops as soon as such enzymes become saturated, that is, whenever all their activation centers are bound to their substrates. In that condition a raise of the carbon-dioxide concentration will not raise the photosynthesis rate.