3-2 Molecules of Life

3-2 Molecules of Life

Proteins Lipids Nucleic Acids Carbohydrates 3-2 Molecules of Life Proteins Lipids Nucleic Acids Carbohydrates

Proteins Can you think of an example? Tables 1, 2, and 3, write an example of a protein on a post it note, and place it under next to the sink labeled “proteins”

Proteins Definition – a compound made up of amino acids that helps build cells Held together by peptide bonds

Proteins Many different kinds

Proteins Many different kinds Found in skin and muscles, and everywhere else

Proteins Many different kinds Found in skin and muscles, and everywhere else Make up enzymes

Proteins Examples: Keratin (hair) Collagen (bones, muscles, skin)

Carbohydrates Can you think of an example? Tables 4, 5, and 6, write an example of a carbohydrate on a post it note, and place it under next to the sink labeled “carbohydrates”

Carbohydrates Definition – carbon-based sugars, starches, and fibers Body breaks them down to provide energy

Carbohydrates Examples: Glucose Fructose Sucrose (table sugar)

Lipids Fats Can you think of an example? Tables 7, 8, and 9, write an example of a lipid on a post it note, and place it next to the sink labeled “lipids”

Lipids Definition – fatty acids not soluble in water Makes up cell membranes

Lipids Examples: Oils Fats Steroids Waxes

Lipids Head-hydrophilic Tail - hydrophobic

Lipids Saturated-single bonded carbon chain

Lipids Saturated-single bonded carbon chain Unsaturated-double bonded carbon chain

Lipid Bilayer makes the cell membrane

Nucleic Acids Hereditary information and storage ex. DNA and RNA Contains C, H, O, N

Monomers One molecule by itself Can sometimes make chains with other monomers to make a…

Polymer A chain of connected monomers

Polymer Molecule Monomer Polymer Example Proteins Amino acid Polypeptide ? Lipids Fatty acid lipid Nucleic Acids Nucleotides Nucleic acids Carbohydrates monosaccharides Polysaccharides