04. “Cell death is a constant feature in both health and disease. A particular type of cell death is  apoptosis”. 4.1. Define apoptosis. (10 marks) 4.2. Briefly describe the differences between apoptosis and necrosis. (30 marks) 4.3. Describe the light microscopic appearance that you observe in a cell undergoing apoptosis.  (20 marks) 4.4. List two (2) genes that control apoptosis. (10 marks) 4.5. Briefly describe the importance of apoptosis in, a) A pathological condition. (15 marks) b) A physiological condition.