Final answer:
A protein is the largest in size compared to a glucose molecule, nucleotide, or carbon atom, as it is made up of long chains of amino acids.
Step-by-step explanation:
The largest in size among the options given would be a protein. Using the information provided as a reference and understanding the hierarchy of biological structures:
- A carbon atom is a fundamental unit of matter and very small in size.
- A nucleotide consists of a sugar, a phosphate group, and a nitrogenous base, and is part of the building blocks of nucleic acids.
- Glucose is a simple sugar, larger than a carbon atom or a nucleotide but still relatively small compared to a protein.
- A protein is a complex molecule made up of one or more chains of amino acids and is significantly larger than a glucose molecule, a nucleotide, or a carbon atom.
A closer look at the provided SEO keywords hints at the comparison of sizes among biological structures. The keyword mentioning amino acids being larger than a certain nanometer range but smaller than another indicates that proteins, which are polymers of amino acids, would be even larger. As proteins can consist of many amino acids, they are the largest structures listed among the options.