A small Ca+2 binding protein that modifies the activity of many enzymes and other proteins in response to changes of Ca+2 concentration is known as______________?
Correct answer: B. Calmodulin
- A. Cycline
- B. Calmodulin
- C. Collagen
- D. Kinesin
Explanation
Calmodulin is a small calcium-binding regulatory protein; when bound to Ca²⁺, it changes shape and activates or inhibits many target enzymes and proteins. The other options are structural or motor proteins, not calcium sensors.
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