At the physiological pH the DNA molecules are
Correct Answer: Negatively charged
Description: 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)"
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Biochemistry
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