Reflecting back on the course, what are three major themes you would identify that connect the various topics discussed in this course-how are they connect with what you knew before this course? What knowledge have you gained with regards to these three themes you have identified?

Three main topics that I have found interesteing are  proteins, amino acids, and enzymes. They are connected to each other and our existence depends on them. Amino acids are molecules which contain an amine group, a carboxylic acid group, and a side chain that is specific to each amino acid. Amino acids serve as building blocks of proteins. Proteins are derived from amino acids using information encoded in genes. Each protein has its own unique amino acid sequence
Proteins are biochemical compounds consisting of one or more polypeptides which are usually folded and facilitate biological functions. A polypeptide is a single linear polymer chain of amino acids bonded together by peptide bonds between the carboxyl and amino groups of adjacent amino acid residue. Like other biological macromolecules, proteins are essential parts of organisms and participate in every process within cells. Many proteins are enzymes that catalyze biochemical reactions and are vital to metabolism.
Enzymes are biological molecules that catalyze chemical reactions. Almost all chemical reactions in a biological cell need enzymes in order to occur. They work by lowering the activation energy for a reaction.
All three of these topics are crucial for the organisms and they have been covered in almost every class. I think everyone should know their main functions whether they major in natural sciences or social sciences.