Because, if no Rubisco is avalible to fix CO2, the Calvin Cycle would not be in action, photosynthesis would be incomplete, the ususal products: Proteins, Lipids, Carbohydrates (O2) and vitamins/minerals would not be made. After all the food stores ran out, all Hetrotrophs and Autotrophs would have no food to survive.
So Basically, Rubisco is the bain of life.
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Rubisco is the most important enzyme on earth because it is responsible for catalyzing the initial carbon fixation step in photosynthesis, converting carbon dioxide into organic compounds. This process is essential for all life on earth as it is the primary way in which carbon enters the food chain and supports the growth of plants and other organisms.
Rubisco
Rubisco is the most abundant protein on earth because it is involved in the process of carbon fixation during photosynthesis in plants, algae, and cyanobacteria. This enzyme is critical for converting carbon dioxide into organic compounds, making it essential for the survival of almost all forms of life on earth. Due to its importance in the global carbon cycle, Rubisco has become highly abundant in the biosphere.
Which is the most important and abundant carbon-fixing enzyme on earth
The enzyme that initiates the fixation of carbon in the Calvin cycle is called ribulose-1,5-bisphosphate carboxylase/oxygenase, commonly known as RuBisCO. It is considered the most abundant protein in the world due to its crucial role in converting carbon dioxide into organic compounds during photosynthesis.
chloroplasts