Like DNA, __________ is composed of a sugar and phosphate backbone, along with varying sequences of four bases.

The correct answer is RNA.

RNA (ribonucleic acid) is similar to DNA in that it has a sugar and phosphate backbone. However, in RNA, the sugar is ribose instead of deoxyribose (which is found in DNA). Both RNA and DNA contain sequences of four bases, but RNA uses uracil (U) instead of thymine (T), which is found in DNA. If you need more detailed explanations or resources, check the extended services page!