Correct Answer: D
Explanation:
DNA is the largest macromolecule in the organisms. It is a long, double” chain of deoxyribonucleotide, or deoxyribotide, units. The two deoxyribonucleotide chains are twisted around a common axis to form a right-handed double helix (spiral) that encloses a cylindrical space in it. Each deoxyribonucleotide unit, in turn, consists of three different molecules: phosphate, (P034), a 5-carbon deoxyribose sugar (C3Hi0O4) and a nitrogenous base