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.
There are four types of protein structure: 1  Primary Structure: sequence of amino acids in the chain. 2  Secondary Structure: the shape of the protein molecule caused by hydrogen-bonding between -C=O and -N-H groups within the chain. 3  Tertiary Structure: the interaction between R-groups that causes folding and bending.