The Water Molecule How is water neutral?
KeyC#1: Why are water molecules polar? Uneven distribution of
electrons between the hydrogen and oxygen atoms.
Oxygen (-)
Hydrogen (+)
Let’s draw!
Why are polar molecules attracted to each other?
What is the difference between COHESION and ADHESION?
What are some examples of each?
http://ed.ted.com/lessons/how-polarity-makes-water-behave-strangely-christina-kleinberg#watch
Solutions and Suspensions What is a mixture? Give me
some examples of mixtures.
What is a solution?
Solute is diLUTEd Solvent is the disSOLVEr Suspensions: materials that do
not dissolve but are suspended (i.e. blood)
Acids, Bases, and pH What is the range of the
pH scale?
What is an acid?
What is a base?
What is a buffer? What is the pH of pure water? Explain.
Macromolecules
What is a macromolecule?
How are they formed?
KeyC#1: What are the functions of each group of organic compounds?CarbohydratesLipidsNucleic AcidsProteins
Carbohydrates
Composition: 1:2:1 ratio of carbon, hydrogen and oxygen atoms.
Function: used for energy and structure
Simple sugars are called…
Complex sugars are called…
Lipids
Composition: mostly carbon and hydrogen atoms (glycerol molecule + fatty acid, fig. 2-14)
Function: energy storage; waterproof membranes Ex. Cell Membrane
What does it mean when a lipid is saturated or unsaturated?
Nucleic Acids Composition: H, O, N, C,
and P; polymers of nucleotides
What is a nucleotide?
Function: store and transmit genetic information
What are the two kinds of nucleic acids?