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, that would make _____ the most important enzyme in the biosphere.
A)chlorophyll
B)ATP synthetase
C)sucrase
D)rubisco

Question

Quizplus · Accepted Answer

Rubisco is responsible for fixing carbon dioxide from the atmosphere into organic compounds that can be used by living organisms. It is essential for photosynthesis and therefore is considered to be the most important enzyme in the biosphere. Chlorophyll and ATP synthetase are important for the process of photosynthesis and producing ATP, but do not directly play a role in carbon fixation. Sucrase is involved in the breakdown of sucrose and is not essential for carbon fixation or photosynthesis.

Because Inorganic Carbon Cannot Be Used by Living Organisms to Build