Process by which mitochondria breaks down food molecules (glucose) to produce ATP
Step One
Glycolysis
Step Two
Krebs cycle
Intermediate step
2 Pyruvic Acids enter Mitochondrion; turns them into 2 Acetyl CoA
Step 3
Electron Transport Chain
Formula of Cellular Respiration:
C6 H12 O6 + 6O2 -> 6CO2 + 6H2 O + ENERGY
Three stages of cellular respiration:
Glycolysis, Krebs cycle, ETC
Glycolysis: Aerobic or anaerobic?
Anaerobic
Krebs cycle: aerobic or anaerobic?
aerobic
ETC: aerobic or anaerobic?
aerobic
Glycolysis definition:
a series of chemical reactions in the cytoplasm of a cell that break down glucose (a 6 carbon sugar) into two molecules of pyruvic acid (a 3 carbon compound)
# ATP from Glycolysis
2 ATP produced
location of Glycolysis:
happens in the cytoplasm
location of Krebs cycle:
happens in the mitochondria
location of electron transport chain:
happens in the INNER membrane of the mitochondria
What happens in glycolysis
breaks down glucose into pyruvic acid
what happens in krebs cycle
energizes electron carriers for use in the electron transport chain
what happens in the electron transport chain
electron is released from NADH, hops across transport proteins sending tons of H+ out of membrane, and when a H+ is forced back, ATP is formed from ADP
ATP count from krebs cycle
2 ATP produced
ATP count from ETC
32 ATP produced
Fermentation: aerobic or anaerobic?
anaerobic
No oxygen=
cellular respiration won't happen; ETC comes to a halt
Two types of fermentation:
Lactic Acid Fermentation and Alcoholic Fermentation
Results for each glucose(2 acetyl coA molecules) that enter the Krebs cycle:
4CO2 released, 6 NADH produced (NAD+ acts as an electron carrier and gains an H+) 2 ATP is produced, 2 FADH2 is formed (FAD+ acts as an electron carrier and gains two H+)
NAD+ turns into NADH
when it accepts two electrons
H2O is formed in the
ETC when oxygen is combined with hydrogen in the second to last protein
ATP Synthase is
the last protein in the ETC; it makes ATP by binding free phosphates to ADP when H+ comes back through
Alcoholic fermentation produces:
2 CO2 and 2 ethanol molecules; used by yeast and bacteria
Lactic acid fermentation produces:
2 lactate molecules, which go from the muscles to the liver to be turned into pyruvic acid again