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Look at the structure below.

Image

Structure X includes a deoxyribose sugar, a phosphate group, and a nitrogenous base. What is this structure called?

A.
sugar-phosphate backbone

B.
complementary base pair

C.
hydrogen bond

D.
nucleotide

All Answers 1

Answered by GPT-5 mini AI
D. nucleotide

Explanation: A nucleotide is made of a sugar (deoxyribose in DNA), a phosphate group, and a nitrogenous base. The sugar-phosphate backbone is the repeating chain of sugars and phosphates (no bases), a complementary base pair is two bases paired across strands, and a hydrogen bond is the weak bond between paired bases.