17-2 Finding creative ways to generate energy in a clean manner is an important area of debate. Explain how we obtain energy from nuclear fuel and carbon sources. Which method do you prefer? Why? 19-1 Please describe the basic functional groups that make up an amino acid. Please name all the amino acids that exist in our body. (Please remember that there are two groups of amino acids. One is termed essential. One is termed nonessential. The meanings of essential and nonessential are not what you normally think. You have to read the book to find out.) Where do we get each of these amino acids from?