Which of the following statements is false?

Which of the following statements is false?
  a. Hemoglobin functions as a buffer.
  b. Bicarbonate ions tend to diffuse out of red blood cells into the blood plasma.
  c. The movement of molecules go in different directions in the metabolically active tissues
  and the alveoli.
  d. Carbonic anhydrase is an enzyme that promotes the formation of oxyhemoglobin.
  e. Hemoglobin consists of four polypeptide chains.

Question 2

Infant respiratory distress syndrome is caused by
  a. surfactant-secreting cells that do not work yet.
  b. underdeveloped alveoli.
  c. clogged bronchioles.
  d. underdeveloped bronchi.
  e. small lungs.