Biology: Chapter 9 Notes
Cellular Respiration
1. Organisms get the energy they need from
Food or the Sun!
2. Energy stored in food is expressed in
Units of calories
3. Define calorie.
Energy needed to raise the temperature of 1
gram of water 1 degree celcius.
4. What is a Calorie (with a capital C?)
How does it compare with a calorie?
Kilocalorie = 1000 calories
5. How many calories are in the following?
Glucose: 3,811
Carbohydrates: 4,000
Fats: 9,000
6. Define cellular respiration using
symbols and words.
O2 + C6H12O6
CO2 + H2O + ATP
Oxygen plus glucose yeilds carbon dioxide plus
water plus energy (ATP)
7. What is the difference between
aerobic and anaerobic?
With oxygen
Without oxygen
8. In cellular respiration, which
processes (2) are aerobic?
Kreb’s Cycle and Electron Transport Chain
9. In cellular respiration, which process
(1) is anaerobic?
Glycolysis
10. Why are photosynthesis and
cellular respiration often considered
opposites?
Products and reactants are on opposite sides of
the equations.
Waste product = Reactants
11. How many ATP does cellular
respiration generate?
36 ATP
12. In your opinion, is cellular
respiration efficient? Why or why not?
Yes, one glucose = 36 ATP
More efficient than food for us or fuel for a car!
13. Energy not used to produce ATP is
released as
Heat
14-19. What are the three main stages
of cellular respiration? Describe each.
Glycolysis – “sugar breaking” – glucose is broken
down
Krebs Cycle – chemicals from glycolysis are further
broken down
Electron Transport and ATP Synthesis–
high-energy electrons from Glycolysis and Krebs
Cycle convert ADP into ATP
Add to bottom of notes:
Fermentation: When oxygen is not present, this
occurs instead of the Krebs cycle.
Example: yeast to alcohol, humans making lactic
acid during exercise