DNA's phosphodiester is composed of alternating sugars and phosphates.

DNA's phosphodiester bond is composed of alternating sugars and phosphates.

Step 1: Understand the question The question is asking about the composition of DNA's phosphodiester bond.

Step 2: Define phosphodiester bond A phosphodiester bond is a chemical bond that connects the sugar molecules in the backbone of DNA.

Step 3: Identify the components of the phosphodiester bond The phosphodiester bond is composed of two main components: sugars and phosphates.

Step 4: Understand the structure of DNA DNA is made up of two strands that are connected by these phosphodiester bonds. Each strand consists of a sugar-phosphate backbone, with the sugars and phosphates alternating.

Step 5: Visualize the structure Imagine a ladder-like structure, where the sugars and phosphates form the sides of the ladder, and the base pairs (adenine, thymine, cytosine, and guanine) form the rungs.

Step 6: Conclusion In conclusion, DNA's phosphodiester bond is composed of alternating sugars and phosphates, forming the backbone of the DNA molecule.