Q. Polynucleotide chain of DNA contains

A) a nitrogenous base, ribose sugar and phosphate group

B) a nitrogenous base, deoxyribose sugar and phosphate group

C) a nitrogenous base and phosphate group only

D) deoxyribose sugar, ribose sugar and phosphate group

✔ Correct Answer: a nitrogenous base, deoxyribose sugar and phosphate group

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