a folded chain of amino acids a folded chain of carbohydrates a branched chain of fatty acids a branched chain of nucleic acids
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which of these is part of the description of protein?
Possibilities:
- a folded chain of amino acids
- a folded chain of carbohydrates
- a branched chain of fatty acids
- a branched chain of nucleic acids

a folded chain of amino acids