AP BIOLOGY

Detailed explanation-1: -However, all proteins contain an element not found in carbohydrates and lipids is nitrogen. Nitrogen which is present in all amino acids (the building blocks that make up the protein chains).

Detailed explanation-2: -Proteins differ from carbohydrates and lipids in that they always contain nitrogen, carbon, hydrogen, and oxygen.

Detailed explanation-3: -Explanation: Amino acids have amine (−NH2) groups in them, but carbohydrates do not. From the term, carbohydrates only contain carbon, hydrogen, and oxygen atoms, and they vary in shapes and sizes.

Detailed explanation-4: -Answer and Explanation: A feature of amino acids not found in carbohydrates is the presence of nitrogen atoms. Amino acids are the building blocks of proteins, and they contain carbon, hydrogen, oxygen and nitrogen atoms.

Detailed explanation-5: -Proteins are composed of amino acids. Proteins serve as the major building blocks of organisms. Proteins are large complex molecules that combine to form various components of living organisms such as muscle fibers, enzymes, and hemoglobin.