Which of the following organic molecules may have up to 4 levels of structure

If a set of instructions that determines all of the charactersitics of an organism is comparedto a book, and a chromosme is compared to chaper in the book, then what might be compared to a paragraph in the book?

Explain how sequences of amino acids in proteins can be used to reveal relationships among organisms.

Stephen is a student who wants to test his knowledge of medical terminology. which option could he use?