Presentation on theme: "Biomolecules Ch - 2The Molecules of Life. Molecules are combinations of atoms What are the 4 elements that make up 96% of living matter? Carbon C Oxygen."— Presentation transcript:
Lipids: Phospholipids Phospholipids: form cell membranes
Lipids Fats (triglycerides) 3 C backbone (glycerol) attached to 3 long chains of hydrocarbons (fatty acids) Store energy, cushion organs, insulate
Lipids: Fats Saturated fats – all fatty acids have maximum H atoms – Solid at room T Unsaturated fats – One or more double bond in fatty acid chain, causing in to kink Which do you want to limit in your diet?
Lipids: Steroids C-skeleton of 4 fused rings Steroids are chemical signals – Cholesterol = essential in cell membranes; building block of other steroids
Proteins! When there is something to do, it is a protein that does it.
Proteins Proteins have many important functions. Some are: – Antibodies – Receptors – Enzymes – Neurotransmittors – Energy Storage – Build and Repair muscles and tissue
Amino Acids Proteins are polymers made up of monomers called amino acids Amino Acids consist of one central C bonded to 4 partners: – H-atom – Carboxyl – Amino – An “R-group”
Polypeptides Amino acids link together forming peptide bonds
Protein Structure Polypeptides take shape to from a protein. Each protein has its own unique 3-D shape that determines its function The shape of a protein is determined by how its amino acids interact
Denaturation Proteins can be unraveled and changed by changes in temp, pH, or other changes in environment