Final answer:
The molecule made of nucleotides joined by phosphodiester bonds that connect the 2' OH to the 5' phosphate is DNA (deoxyribonucleic acid). The 5' and 3' ends of a DNA molecule refer to the free phosphate group at one end and the free 3'-OH group at the other end, respectively.
Step-by-step explanation:
The molecule made of nucleotides joined by phosphodiester bonds that connect the 2' OH to the 5' phosphate is DNA (deoxyribonucleic acid).
The phosphate group of one nucleotide bonds covalently with the sugar molecule of the next nucleotide, forming a long polymer of nucleotide monomers. The sugar-phosphate groups line up in a "backbone" for each single strand of DNA, and the nucleotide bases stick out from this backbone. The 5' and 3' ends of a DNA molecule refer to the free phosphate group at one end and the free 3'-OH group at the other end, respectively.
DNA is composed of two single strands held together along their length with hydrogen bonds between the bases, forming a double helix structure.