What Is the Cause of Free Calcium in the Cytosol

question 13

Multiple Choice

What is the cause of free calcium in the cytosol that damages cell membranes by uncontrolled enzyme activation?

• A)Activation of endonuclease interferes with the binding of calcium to protein.
• B)Activation of phospholipases, to which calcium normally binds, degrades the proteins.
• C)An influx of phosphate ions competes with calcium for binding to proteins.
• D)Depletion of ATP normally pumps calcium from the cell.

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