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Bioenergetics

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by

Jeff Nichols

on 20 October 2015

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Transcript of Bioenergetics

Cellular Respiration
Cellular Respiration
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.

Socrative Refresher!
Space Race!
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.
Respiration
Occurs in BOTH plant and animal cells.
Bioenergetics
Fermentation
- 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
1.
Lactic Acid Fermentation:
Occurs in your muscles.
-When lactic acid builds up muscles feel
weak
and
sore.
2.
Alcoholic fermentation:
Occurs in yeast cells (and some other cells)
a. Main products:
Carbon dioxide
and
Ethyl alcohol



Respiration Equation
C6H12O6 + O2 -> 6CO2 + 6 H2O + Energy
Glucose Oxygen Carbon Dioxide Water
(REACTANTS) (PRODUCTS)
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;
1. Glycolosis
2. The Citric Acid Cycle (aka Kreb Cycle)
3. The Electron Transport Chain.

Glycolosis
is anaerobic (does NOT require oxygen)
Citric Acid
and
Electron Transport
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
Oxygen Requirements
-The CAC and the ETC do not require energy.

-Without Oxygen (anaerobic) cells still produce 2 ATP.
ATP Production
Aerobic respiration produces 36 ATP.

Anaerobic only performs glycolysis and produces 2 ATP
Full transcript