Answer: 2.proteins
Explanation:
Proteins are the important biomolecules. These are called as the building blocks of life. Proteins have many biological roles in the body of the organisms. These function to transport substances across the cell membranes, keep the genetic material in the organized state and facilitate the movement of the entire cell.
Proteins are the components of the enzymes and the hormones. The protein called as hemoglobin is responsible for transport oxygen to the red blood cells.
