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An enzyme requires Mg+2 to catalyze the substrate. The Mg+2 is identified as:

Correct answer: C. Activator

  • A. Prosthetic group
  • B. Coenzyme
  • C. Activator
  • D. Inhibitor

Explanation

Mg+2 serves as an activator that binds to the enzyme, facilitating its interaction with the substrate and promoting catalytic activity. This is crucial for the enzyme's function. The other options are incorrect because a prosthetic group is typically an organic compound, coenzymes are organic molecules, and inhibitors are substances that reduce enzyme activity, which contradicts the role of Mg+2 in this scenario.

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About Enzymes

Enzymes are biological catalysts that lower activation energy without being consumed, and their specificity is explained by the lock and key and induced fit models. Work includes the effects of temperature, pH and substrate concentration on reaction rate, plus competitive and non-competitive inhibition and how these differ.

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