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Name the element which is an activator o...

Name the element which is an activator of RuBisCO and PEPcase.

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**Step-by-Step Solution:** 1. **Understanding the Question**: The question asks for an element that acts as an activator for two specific enzymes: RuBisCO and PEPcase. 2. **Identifying the Enzymes**: - **RuBisCO** (Ribulose bisphosphate carboxylase/oxygenase) is an enzyme that plays a crucial role in the Calvin cycle, which is part of the C3 photosynthetic pathway. - **PEPcase** (Phosphoenolpyruvate carboxylase) is an enzyme involved in the C4 photosynthetic pathway. 3. **Role of Activators**: Enzymes often require certain elements (cofactors) to function effectively. These elements can enhance the activity of the enzymes. 4. **Finding the Element**: The element that is known to activate both RuBisCO and PEPcase is Magnesium (Mg). Magnesium ions are essential for the proper functioning of these enzymes. 5. **Final Answer**: Therefore, the element that acts as an activator for RuBisCO and PEPcase is **Magnesium**. ---
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