Phosphodiester bonds serve to link which of the following?

• A. Amino acids
• B. Nucleotides
• C. Fatty acids
• D. Sugars

Answer: (B)

Phosphodiester bonds are crucial for the structure of nucleic acids, such as DNA and RNA. These bonds form between the phosphate group of one nucleotide and the hydroxyl group on the sugar of another nucleotide. This linkage creates the backbone of the nucleic acid strands, connecting the nucleotides in a linear sequence.

The formation of phosphodiester bonds involves a condensation reaction where a water molecule is released, and a stable bond is formed, allowing for the storage and transmission of genetic information.

In contrast, the other choices relate to different types of bonds: amino acids are linked by peptide bonds, fatty acids are components of lipids and are associated with ester bonds, while sugars form glycosidic bonds in carbohydrates. Thus, phosphodiester bonds specifically connect nucleotides, making this choice the correct answer.