SMATH #11
Thais read
newspapers
at their
flooded
home in
Bangkok
near the
Chao Phraya
river on Oct.
16
What science and math concepts are visible in this photo?
Glycolysis and Fermentation
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Section:
Slide # 2
Cells Need Energy
1. Organisms obtain energy from food
2. Glucose is main source of food for cells
3. Cells break chemical bonds of glucose; energy
released
4. Energy is stored in ATP
5. Making ATP is part of cellular respiration
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Section:
Slide # 3
Cellular Respiration Equation
Cellular Respiration produces carbon dioxide
and water, which are used as starting materials
(reactants) in photosynthesis
Enzymes
C6H12O6 + 6 O2——————— 6 CO2 + 6 H2O + 36 ATP
Reactants
Products
Slide # 11
Glycolysis: 1st Step
1. Glycolysis: occurs in cytoplasm
2. Does not use oxygen
3. Produces a net gain of 2 ATP’s
Glycolysis: 1st Step
Glycolysis is the sequence of reactions that breakdowns
glucose to obtain energy.
All organism undergo glycolysis.
Glycolysis can be carried out both in the presence or in the
absence of oxygen.
 Aerobic respiration refers to the entire conversion of
glucose to carbon dioxide in the presence of oxygen.
 Anaerobic respiration occurs in the absence of oxygen
and it is called fermentation.
Slide # 9
Fermentation
1. Fermentation:
a. Respiration that does not use O2
b. Releases net gain of 2ATP’s
2. Lactic Acid fermentation:
a. Glucose is broken down into lactic acid & CO2
b. Occurs in muscle cells during intense exercise
c. Lactic acid causes burning sensation in muscle
cells
3. Alcoholic fermentation: (Occurs in Yeast)
a. Glucose is broken down into alcohol & CO2
b. Yeast ferment sugar to make bread dough rise
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Section:
Conclusion
Fermentation and cellular respiration are
anaerobic and aerobic alternatives,
respectively, for producing ATP from
sugars.
Fermentation Lab
Today, you will demonstrate the effects of
cell energy processes on gas production
using the Fermentation Lab.
You will need:
Three test tubes
Three balloons + 1 piece of string
Three yeast samples
Cup of warm water
250 ml beaker
Homework
Graph your results from the Fermentation Lab (in
your notebook)
Draw a diagram of the setup and procedures as
part of your journal entry for the lab. (in your
notebook)
Read Chp.10, pgs. 241-249
Section Assessment questions 1-3 on pgs.
243 and 249 (in your notebook)
Reflection DUE on Friday!