Answer:
DNA is a double-stranded molecule that looks like a spiral staircase
Explanation:
DNA is double stranded, as it has two intertwined strands.
It also has a double helix structure that looks like a spiral staircase. The "steps" of the DNA staircase structure are formed by the nucleotide bases.
So, the correct answer is that DNA is a double-stranded molecule that looks like a spiral staircase.
