Kinase requires_______________?
Correct answer: D. Mg++
- A. MN++
- B. Cu++
- C. Inorganic phosphate
- D. Mg++
Explanation
Most kinases transfer phosphate from ATP to a substrate and require Mg²⁺ to bind and properly orient ATP. Mn²⁺ can support some kinases, but Mg²⁺ is the standard cofactor.
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