Question

what molecule is made of two strands of nucleotides formed into a double helix? a rna b dna c protein

Explanation:

DNA (deoxyribonucleic acid) is composed of two strands of nucleotides that twist around each other to form a double - helix structure. RNA is usually single - stranded. Proteins are made up of amino acids, not nucleotides in a double - helix form.

Answer:

B. DNA