Which component is NOT part of a nucleotide?

A nucleotide is the basic building block of nucleic acids, such as DNA and RNA, and it consists of three key components: a nitrogenous base, a sugar, and a phosphate group.

In the context of the provided options, deoxyribose and ribose are types of sugars found in DNA and RNA, respectively. Deoxyribose is the sugar present in DNA, while ribose is the sugar found in RNA. The phosphate group is also an essential part of the nucleotide structure, linking the sugar molecules together to form the backbone of DNA and RNA strands.

Amino acids, on the other hand, are the building blocks of proteins, not nucleotides. They have a different composition and function within biological systems. This distinction is why the option referring to amino acids is the correct choice for identifying a component that is not part of a nucleotide. Understanding the structure of nucleotides and their roles in genetic material helps clarify their importance in biological processes and differentiates them from proteins, which are formed by amino acids.