At the physiological pH the DNA molecules are: (A) Positively charged, (B) Negatively charged, (C) Neutral, (D) Amphipathic
Answer is B. Ans. is 'b' i.e. Negatively charged DNA molecules are negatively charged, this is evident as it is stained by a cationic (positively charged) dye.Read the following lines for Ronald Hoffman Hematology:"Anionic cellular elements (nuclear DNA) reacts with cationic dye (Methylene blue)"