A nucleotide is formed from a nitrogen-containing organic base,a ________________ molecule,and a phosphate molecule.

Question

Quizplus · Accepted Answer

A nucleotide is composed of three components: a nitrogen-containing organic base, a five-carbon sugar molecule (pentose sugar), and a phosphate molecule. The five-carbon sugar is usually either ribose (in RNA) or deoxyribose (in DNA). Choice A, three-carbon sugar, and choice C, seven-carbon sugar, are not correct because nucleotides contain a pentose sugar which is a five-carbon sugar. Choice D, nine-carbon sugar, does not exist in nucleotides.

A Nucleotide Is Formed from a Nitrogen-Containing Organic Base,a ________________