Vitamin B12 is essential in what aspect of blood cell reproduction?: (A) Formation of hemoglobin, (B) Extrusion of the nucleus from the normoblasts, (C) Formation of DNA, (D) Activation of erythropoietin
Answer is C. Within 6-9 hours of treatment with vitamin B12 formation of nuclear DNA component promotes normoblastic reaction of the bone marrow Folic acid also promotes the formation of nucleic acids. Ref: Biochemistry by U. Satyanarayana 3rd edition Pgno : 154