Hemopoiesis means -

Correct option is A

Sol. Hemopoiesis (or hematopoiesis) is the process of blood cell formation, including red blood cells (RBCs), white blood cells (WBCs), and platelets. This process occurs mainly in the bone marrow and is regulated by growth factors like erythropoietin (for RBCs) and thrombopoietin (for platelets). In adults, the primary site of hemopoiesis is the red bone marrow of long bones, sternum, and pelvis.
Explanation of Each Option:
· Synthesis of RBC: Correct answer; hemopoiesis is the production of blood cells, including RBCs.
· Breakdown of RBC: Incorrect; RBC breakdown is called hemolysis, which occurs in the spleen and liver.
· Synthesis of proteins: Incorrect; protein synthesis occurs in ribosomes, not part of hemopoiesis.
· Synthesis of DNA: Incorrect; DNA synthesis occurs in the nucleus during cell replication, unrelated to hemopoiesis.