Calmodulin is a: (Multiple Choice)

Calmodulin is a:
  a. hormone.
  b. calcium-binding protein.
  c. phosphatase.
  d. protein kinase.
  e. phospholipase.

Question 2

Which of the following statements concerning calcium ions is FALSE?
  a. They are involved in fertilization, blood clotting, and microtubule disassembly.
  b. Their concentration in the cytosol rises when Ca2+ gates open in the ER.
  c. Their concentration in the cytosol is usually higher than in the extracellular fluid.
  d. They can act by themselves, without binding to calmodulin.
  e. They can exert an effect after binding to calmodulin.