Dna and rna differ in all but one of the following ways.
a)
dna is double-stranded, while rna is single stranded.
b)
rna uses the sugar ribose in its backbone, while dna uses deoxyribose.
c)
dna contains the base uracil, while rna contains the base thymine instead.
d)
dna is found in chromosomes in the nucleus, while rna can move around the cell.

The correct answer would be C) DNA contains the base uracil, while RNA contains the base thymine instead.

DNA, as well as RNA, are nucleic acids which are made up of nucleotides.

In DNA, the nucleotide is made up of deoxyribonucleic acid, a phosphate group and nitrogen base (adenine, guanine, cytosine, or thymine).

In contrast, ribonucleotide is made up of the ribose sugar, phosphate group and nitrogen base (adenine, guanine, cytosine or uracil).  

In addition, DNA is a double-stranded molecule whereas RNA is a single-stranded molecule.