Regulatory proteins control the cell cycle.
If the regulatory proteins are malfunctioning or absent, the cells may reproduce abnormally fast, causing a tumor.
Answer: D.
The E. reticulum and Golgi bodies are concerned with secretion and synthesis of molecular substances e.g protein , lipids and steroid. Therefore these cellular organelles should contain Plasma B cells and Islets of Langerhans. for protein hormone synthesis(insulin) and antibodies production
Explanation:
