Because inorganic carbon cannot be used by living organisms to build biological molecules,carbon fixation may be the most important metabolic process in the biosphere; if so,the most important enzyme in the biosphere would be
A) chlorophyll.
B) ATP synthase.
C) sucrase.
D) rubisco.

Question

Quizplus · Accepted Answer

Rubisco is the enzyme responsible for catalyzing the fixation of inorganic carbon from atmospheric CO2 into organic molecules such as glucose during photosynthesis. This process is essential for the production of biomass, which is the basis for the food chain and primary biomass production in terrestrial and aquatic ecosystems. Therefore, rubisco is considered to be the most important enzyme in the biosphere. The other choices listed are important enzymes, but not as crucial for carbon fixation and primary productivity.

Because Inorganic Carbon Cannot Be Used by Living Organisms to Build