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Transcript of Bioenergetics
1. Food provides us with energy.
a. How does that food provide the energy?
i. Food is digested.
ii. Molecules enter your cells.
iii. Molecules are used to create energy (ATP)
2. Cellular Respiration: The process by which cells make energy (ATP) from glucose
Comparing Photosynthesis and Cellular Respiration
1. Write the equation for cellular respiration.
2. Write the equation for photosynthesis.
3. Write a paragraph explaining what you notice.
1. With your group (READ each question entirely to your group), DO NOT answer on your own without a consensus.
2. Answer each question regarding photosynthesis.
3. The group with the highest score wins CANDY.
Occurs in BOTH plant and animal cells.
- Cells can work without oxygen.
-The anaerobic process of fermentation follows gycolysis. Produces ATP until oxygen becomes available.
-Some anaerobic organisms survive in anaerobic enironments.
-Fermentation only produces 2 ATP (from glycolysis)
Types of Fermentation
Lactic Acid Fermentation:
Occurs in your muscles.
-When lactic acid builds up muscles feel
Occurs in yeast cells (and some other cells)
a. Main products:
C6H12O6 + O2 -> 6CO2 + 6 H2O + Energy
Glucose Oxygen Carbon Dioxide Water
Why do you breathe?
1. Respiration is not the same as breathing.
2. They are similar. Oxygen is necessary for both, and they both release carbon dioxide gas.
3. You breathe so you have oxygen to do the process of respiration in your cells.
-NO oxygen = NO respiration
-NO respiration = NO ATP
-NO ATP = dead
3 Stages of Respiration
The 3 Stages of Respiration are;
2. The Citric Acid Cycle (aka Kreb Cycle)
3. The Electron Transport Chain.
is anaerobic (does NOT require oxygen)
are aerobic (require oxygen)
Stage 1: Glycolysis
A series of chemical reactions. Occurs in the cytoplasm.
Breaks down glucose (6 carbon to 3 carbon)
Glyco = sugar Lysis = Breaking
Does NOT require oxygen
Only results in 2 ATP molecules (not very efficient)
Citric Acid Cycle (Kreb Cycle)
The molecues produced during glycolysis move into the CAC to produce more ATP.
The CAC is a series of chemical reactions that occurs in the Mitochondria.
Electron Transport Chain
-Occurs in the inner membrane of the Mitochondria.
-Similar to ETC of Photosynthesis.
-Energized e- are passed from protein to protein in the membrane.
-Energy is release, and used to make ATP
-ETC produces 32 ATP
-The CAC and the ETC do not require energy.
-Without Oxygen (anaerobic) cells still produce 2 ATP.
Aerobic respiration produces 36 ATP.
Anaerobic only performs glycolysis and produces 2 ATP