The fate of the candy bar How do you think these candy bars turn into energy? Do you remember what organelle is responsible for changing food energy into chemical energy in ALL cells?
Jan 08, 2018
The fate of the candy bar How do you think
these candy bars turn into energy?
Do you remember what organelle is responsible for changing food energy into chemical energy in ALL cells?
Cellular Respiration – 2 types
1. Anaerobic (without oxygen) a) Glycolysis b) Fermentation
2. Aerobic (with oxygen) a) Kreb's cycle b) Electron transport system
1. Anaerobic (without oxygen) a) Glycolysis
Sugar is broken downTakes place in cytoplasm in the cellInput:
1 glucose (6 carbon molecule)2 ATP(NAD+)
Output: 2 pyruvates (3 carbon molecules)4 ATP - Net gain of 2 ATP’sNADH
b) Fermentation (still in cytoplasm!)
Input: Pyruvates
Output:Ethyl alcohol or lactic acidCO2
NAD+ (can now be used in Glycolysis again!)
ExamplesYeast in bakingProduction of beer, wine, alcohol
2. Aerobic (with oxygen)
a) Kreb's cycle (aka Citric Acid Cycle)
Takes place in matrix of mitochondria
Input: 2 pyruvate
Output:4 CO2
2 ATPNADH and FADH2
b) Electron transport systemOccurs on cristae of mitochondriaAs electrons move, energy is given offProduces most ATP!Input:
O2
Output:H20
32 ATP!Including Glycolysis and Kreb’s cycle
36 ATP’s Produced!
Glycolysis
FermentationKreb’s Cycle
Electron Transport System
w/out Oxygenw/ Oxygen
Where does this all happen?
Glycolysis _____________ Krebs Cycle ___________ Electron Transport Chain ___________ Fermentation ___________
How many net ATP are made?
Glycolysis _____ Krebs ____ ETC ____ Fermentation ____
Photosynthesis Cell RespirationWhere? Chloroplasts Mitochondria
When? Presence of light All the time
Input CO2 & H20 Glucose & O2
Output Glucose & O2 CO2 & H20
Energy Source
Light Chemical bonds
Energy Result
Energy stored Energy released
Animal or Plant
Plants only Both!