OCS 1005 Chapter : OCS Chapter 4 Lecture
15 Mar 2019
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Document Summary
Proteins: excellent example of a polymer, made of amino acids, 20 naturally occurring amino acids are l-shaped, proteins vary in the number and sequence of the different kinds of amino acids. Enzymes: protein catalyst, every chemical reaction in a living cell. Hormones and receptors: hormones chemical messengers, insulin, receptors specific recognition sites for chemical messengers. Structural proteins: silk, keratin hair, nails. Amino acid structure: central carbon, amino acid, carboxyl group, hydrogen, r group, polar, hydrophilic. Interact with one another or on the surface to interact with water: stabilizing, weak, hydrogen bonds. Native and denatured proteins: native properly folded and functional, denative unfolded and does not function. Roles of weak bonds in biological systems: easily made and broken at physiological temperatures, provide specificity, if weak interactions were strong would crystallize the contents of a cell, attract and attach substrates to enzymes, determine molecular shape. Colligative property: depends on the number of particles (molecules) and not on the nature of the molecules.
