D Learning Task 1: Choose the letter of the correct answer. Write your answe separate sheet of paper. 1. Organisms use as energy sources, structural units, and for purposes and are the largest class of organic compounds found in organisms. A. carbohydrates B. lipids C. protein D. nucleic acid 2. are the molecules in our cells that direct and store informa reproduction and cellular growth. A. carbohydrates B. lipids C. protein D. nucleic acid 3. are used for energy storage, to build structures, and as molecules to help cells communicate with each other. A. carbohydrates B. lipids C. protein D. nucleic acid 4. They are used to build structure, catalyze biochemical reactions, for i response, to package and transport materials, and to help replicate material. AR Learning Task 2: Write in the space provided if the given examples or stat are classified as carbohydrate, lipid, protein or nucleic acid.​