Multiple choice

Nucleotides are building blocks of nucleic acids. Each nucleotide is a composite molecule formed by

  1. base-sugar-OH

  2. base-sugar-phosphate

  3. sugar-phosphate

  4. (base-sugar-phosphate)n

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

 A nucleotide is one of the structural components or building blocks of DNA and RNA. A nucleotide consists of a base (one of four chemicals: adenine, thymine, guanine, and cytosine) plus a molecule of sugar and one of phosphoric acid.