An enzyme requires Mg2+to catalyze the substrate. The Mg2+is best identified as:
Correct answer: B. Activator
- A. Prosthetic group
- B. Activator
- C. Co-enzyme
- D. Inhibitor
Explanation
Mg2+ is an essential inorganic activator for enzyme phosphatase, not to be confused with the prosthetic group.
This question appeared on the UHS MDCAT 2016 paper, which you can sit online with every answer explained.
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About Characteristics of Enzymes
Enzymes are globular biological catalysts that lower activation energy without being consumed, usually showing specificity for particular substrates. Questions cover active sites, enzyme substrate complexes, the lock and key and induced fit models, intracellular and extracellular action, and the effects of denaturation, while distinguishing enzymes from non biological catalysts.
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