Introduction to Biochemistry Please turn in your syllabus and safety contract to your period’s drop box. On a scratch sheet of paper, make a list of everything you ate yesterday. (Be honest!)

Science Process Skills Review

Vocabulary Review Discuss the differences in the following sets of words with your neighbor: Prediction and Hypothesis Conclusion and Theory Independent Variable, Dependent Variable, and Control

Food Diaries An example of a balanced diet for a day An example of an imbalanced diet for a day

Energy in food comes from four macromolecules Lipids Proteins Nucleic acids Carbohydrates

Macromolecules are built from small pieces called monomers Monomers come together to form polymers (broader term for macromolecules)

Protein monomer: amino acids Protein polymer: protein, polypeptide 2 amino acids Dipeptide + H2O Peptide bond Hydrolysis H2O Condensation

Amino acids join to form proteins Draw, color, and label three amino acids, how they join together, and how they break apart in your notes. Proteins can denature.

Carbohydrate monomer: monosaccharide 2 monosaccharides = disaccharide Many monosaccharides = polysaccharide (polymer)

Monosaccharides join to form polysaccharides Glycosidic bonds Draw, color, and label three monosaccharides, how they join together, and how they break apart in your notes.

Nucleic acid monomer: nucleotide Draw and label a picture of a nucleotide in your notes. Base Phosphate Sugar

2 Nucleic Acids DNA RNA

Lipids Monomer: fatty acids Saturated fat Unsaturated fat

Water All of these reactions take place in the solvent of life: water! – Small negative charge + + Small positive charge

Hydrogen Bonds + - H O Hydrogen bond

Finding Macromolecules with Indicators What foods have carbohydrates in them?