Question

complete the paragraph.

dna is a ▼ made of many nucleotide ▼ that typically combine
to form a ▼ helix. this structure resembles a twisted ladder. the inner rungs of
the dna ladder are made of ▼, and the two sides of the ladder are
made of ▼ and ▼ .

Explanation:

1. DNA is a nucleic acid (it is a type of nucleic acid, with RNA being the other main type).
2. It is made of many nucleotide monomers (nucleotides are the building blocks, or monomers, of nucleic acids).
3. It forms a double helix (the classic structure of DNA is a double - stranded helix).
4. The inner rungs are made of base pairs (adenine - thymine and guanine - cytosine pairs, as shown in the diagram with A - T and G - C).
5. The two sides of the ladder are made of sugar (deoxyribose) and phosphate (the backbone of DNA is a sugar - phosphate backbone, with alternating deoxyribose sugar and phosphate groups).

Answer:

DNA is a \boxed{nucleic acid} made of many nucleotide \boxed{monomers} that typically combine to form a \boxed{double} helix. This structure resembles a twisted ladder. The inner rungs of the DNA ladder are made of \boxed{base pairs}, and the two sides of the ladder are made of \boxed{sugar (deoxyribose)} and \boxed{phosphate}.