Honors Biology - December 12th, 2011
SWBAT: Explain the process of cellular respiration.
Warm Up: Get a colored pencil or pen to do homework corrections
1.) Name the two steps of photosynthesis IN ORDER.2.) The organelle where photosynthesis takes place is the ___.3.) Write the equation for chemosynthesis:
Carbon dioxide
Glucose
Oxygen
photosynthesis
Cellular Respiration
water
ATP
heterotroph
autotroph
chemical energy
Compare and Contrast:
Photosynthesis Cellular Respiration
Organelle Involved
Is it Performed by Autotrophs, Heterotrophs or Both?
Reactants
Products
An Introduction to Cellular Respiration:C6 H12O6 + O2 --> CO2 + H2O + ATP
Definition: The 3-step process by which glucose molecules are broken down to release usable energy
Occurs in ALL cells, both eukaryotes and prokaryotes
Prokaryotes do entire process within their cytoplasm because they do not have mitochondria
Step 1 of 3: Glycolysis ("Glucose-breaking")
Glycolysis
C6H12O6 enters the cytoplasm
4 ATP are created. . .
2 NADH + H are created. These skip step 2 and move directly to step 3.
2 pyruvic acid are created. These move to step 2.
. . .2 of those ATP are released
. . .and 2 of those ATP are reused immediately
Steps 2 and 3: The Krebs Cycle and Electron Transport Chain
Step 2: Krebs Cycle
Step 3: Electron Transport Chain
NADH + H from glycolysis made for ETC
oxygen
pyruvic acid from glycolysis
NADH + H and FADH2
Oxygen
water
2 ATP
32 ATP
CO2
For your notes:
CytoplasmNADH + H
FADH2
NADH + H
Oxygen
Water
32 ATP
CO22 ATP
Oxygen
Mitochondria
4 ATP (2 usable)
Pyruvic AcidC6H12O6
Glycolysis
Kreb's Cycle (Citric Acid
Cycle)
Electron Transport
Chain
Fermentation: Cellular Respiration in the Absence of Oxygen
This is used by prokaryotes for ALL of their ATP formation
This is used in eukaryotes as a quick boost to ATP production
We also call this ANAEROBIC RESPIRATION
There are two types of fermentation (anaerobic respiration) -- Lactic Acid Fermentation and Alcoholic Fermenation
Alcoholic Fermentation Occurs in Organisms Like Yeast Anaerobically
Notice that again, oxygen is NOT used and only 2 ATP are produced
2 ATP
Allows glycolysis to continue making 2 ATP when oxygen is
not available in the correct quantities
