The sharing of electrons in alcohol as an example, are much more losely bound; this is a common way that organic compounds are formed, and why organic reactions can proceed at lower temperatures, mediated by enzymes. No enzyme could break down NaCl alone to make pure sodium metal and chlorine gas.
Protein can be categorized into two types: complete and incomplete proteins. Proteins are made up of smaller units, called amino acids. Complete proteins contain all of the amino acids your body needs and include meat, fish, poultry, dairy, and soy products.
Proteins: Complete and Incomplete. There are differences in the types of proteins you eat, some are complete; others are incomplete, and you need them both. Proteins are made of 20 or so building blocks called amino acids. Complete proteins contain the 9 essential amino acids your body needs to build new proteins.