9D Urey Miller Experiment
and 7G Cell Complexity
http://highered.mcgrawhill.com/sites/9834092339/student_vie
w0/chapter26/animation_-_millerurey_experiment.html
Review: What are the four
biomolecules?
Organic Molecules
• Molecules that contain bonds between carbon
atoms.
• Significant because many of them are
IMPORTANT to LIVING things
• Examples: Nucleic acids, ATP, amino acids,
proteins
Chain of Events that Led to Life
• Formation of simple molecules
• Joining of simple molecules to make complex
molecules
• Self-replicating molecules (RNA that replicates
by itself)
• Metabolic processes (LIFE!)
Urey Miller Experiment
Proposed that simple organic molecules could
form in the conditions of early Earth.
Accumulated in the ocean as “soup”
Formed complex organic molecules from the
simple ones
Over time, cells (that live in no oxygen)
anaerobic heterotrophs developed from these
conditions
Urey Miller Experiment
• http://bcs.whfreeman.com/thelifewire/conten
t/chp03/0301s.swf
Checkpoint
What was the overall goal of the Urey Miller
experiment?
To show that _______________ molecules could
be formed from the smaller INORGANIC
conditions of the _________________.
7G Cell Complexity
• Now that we have the first cells…
• How do we get complicated organelles?
Earth’s atmosphere
• The first cells lived when Earth’s atmosphere
lacked oxygen. (NO OXYGEN!)
• Over time, cellular processes such as
photosynthesis and cellular respiration
developed that INTRODUCED Oxygen to the
atmosphere.
Endosymbiotic Theory
• Anaerobic Bacteria (lives without oxygen)
engulfs an aerobic heterotrophic bacteria
(lives in oxygen that can make ATP)
• The bacteria becomes a mitochondria 
makes ATP for the cell.
Endosymbiotic Theory
• The bacteria with the mitochondria engulfs a
photosynthetic bacteria.
• The photosynthetic bacteria becomes the
chloroplast  uses sunlight to make SUGAR
for the cell.