Question

DNA is composed of repeating structural units
called

Answer 1

inner- nucleic acids or nucleotides.

Step-by-step explanation:

the outer part of dna is a sugar phosphate backbone

Answer 2

Answer: nucleotides

Explanation:

The basic repeating unit of nucleic acids are known as nucleotides. A nucleotide consists of three distinct chemical groups, a 5-carbon sugar (ribose or deoxyribose), a nitrogen-rich base - (cytosine (C), guanine (G), adenine (A), thymine (T) in DNA or uracil (U) instead of T (in RNA), and phosphate.