Answer :
Final answer:
Rubisco, a key enzyme in photosynthesis, is responsible for converting G3P into RuBP. This process is part of the Calvin cycle and is fundamental to the carbon cycle.
Explanation:
The enzyme rubisco plays a key role in the process of photosynthesis in plants. Rubisco is responsible for the conversion of G3P (Glyceraldehyde 3-phosphate) into RuBP (Ribulose 1,5-bisphosphate).
In the Calvin cycle (a part of photosynthesis), G3P is first synthesized and then converted back into RuBP with the assistance of the enzyme rubisco, thereby ensuring the cycle can continue. This is a complex reaction where ATP and NADPH (formed in the light-dependent reactions of photosynthesis) are used to convert G3P to RuBP.
Overall, the function of rubisco is considered fundamental to life on Earth because it plays a critical role in the carbon cycle, helping plants absorb carbon dioxide from the atmosphere.
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