A sudden increase in intracellular calcium concentration is observed. How might this affect calcium-binding proteins and cellular signaling?

• A. Calcium-binding proteins will be degraded, stopping cellular signaling.
• B. Calcium-binding proteins will bind to lipids, anchoring them in the membrane.
• C. Calcium-binding proteins will phosphorylate DNA.
• D. Calcium-binding proteins may become activated, altering cellular signaling pathways.

Answer: (D)