What is Protein?
A protein is biological compound containing a linear chain of amino acids bonded together by peptide bonds between the amino group and carboxyl group. The sequence of amino acids is determined by the genes carried in the nucleic acids. Proteins are essential to all living organisms just like all the other macromolecules. Proteins help to regulate almost all cell functions. Our body uses protein to regulate metabolism by getting essential amino acids through a healthy diet and uses protein to help build and form muscle and bone. The monomers of protein are amino acids. Protein contains carbon, hydrogen, oxygen, and nitrogen atoms. One example of protein is keratin. Keratin is a component in hair, skin, nails, and teeth. Another example of protein is an enzyme. Enzymes help increase chemical reactions like the breaking down of food. Other examples of proteins are elastin, collagen, and more.
This is an enzyme. An enzyme is a type of protein.
This is a diagram of keratin. Keratin is a common type of protein.
Protein can be found in all food, especially in meats. This is why the meat section on the food pyramid is sometimes considered the protein section (this section also includes beans).