Medicine Which of the following is not true about cystic fibrosis? A The defective gene encodes for the membrane protein called cystic fibrosis trans membrane channel regulator B Normal CFTR is an ion channel specific for calcium C Autosomal recessive D Altered pH of the surface secretions decreases bactericidal activity. 💡 Explanation Which of the following is not true about cystic fibrosis? ✓ Correct Answer: B. Normal CFTR is an ion channel specific for calcium