Answer:
Ribose sugar
Step-by-step explanation:
Ribose sugar is the 5 carbon sugar that is a structural component of RNA which is different from the sugar that is found in the DNA. In DNA deoxyribose sugar is present in which the 2' hydroxyl group is absent and is replaced by a hydrogen atom.
RNA is made up of nucleotide monomers which consists a ribose sugar, a phosphate group and a nitrogenous base attached to the sugar. In RNA in place of thymine nucleotide, another nucleotide uracil is present. Transcription is the process by which DNA is converted into RNA.
The new nucleotide adds towards 3' end of growing nucleotide by a phosphodiester bond. So the right answer is ribose sugar.