Four Classes of Organic Molecules

Carbohydrates Lipids Proteins Nucleic Acids

Mono – One Poly – Many Monomer: Single molecule Polymer: Chain of monomers “What are the units of Organic Molecules?”

Carbohydrates What are Carbohydrates? - Sugars! Purpose: - Quick source of energy (fuel) for our cells Monomers: Monosaccharides (glucose, fructose) Polymers: Polysaccharides (starch, glycogen)

Lipids What are lipids? - Fats, oils, waxes Purpose: - Energy storage, insulation, cell membranes Monomers: None Polymers: None Fatty Acids

Proteins What are Proteins? - Structures that build us. Purpose: - Building structures, pigments and enzymes. Monomers: Amino Acids Polymers: Polypeptides

Nucleic Acids What are Nucleic Acids? - DNA Purpose: - Storing of genetic information. Monomers: Nucleotides Polymers: DNA

What happens when you eat food? 1.Food enters stomach 2.Stomach breaks down all organic material -Food is broken down into monomers 3.Food moves through intestines -Only food broken into monomers are absorbed. 4. Undigested & unabsorbed materials pass through the body.

What happens when you eat food? Food is composed of polymers

What happens when you eat food? Food travels to stomach

What happens when you eat food? Most food will be broken down into monomers! Monomers can now be absorbed by intestines Undigested material will become fecal matter

Assignment Create a foldable, which identifies the characteristics of the four organic molecules. Assignment: 1.Using 2 sheets of paper, create a foldable with 4 tabs. Label these tabs: Carbohydrates, lipids, proteins, nucleic acids. 2.For each organic molecule tab, include the following: a. Name of the monomers & polymers (ex. Glucose, starch, amino acids, etc.) b. Colored graphic of the polymers/ monomers. c. Function(s) of the organic molecule (carbs are for energy, etc.) d. Random fact about the organic molecule (Cellulose is a polysaccharide that humans cannot digest, etc.)