Name _____________________________________________
Chapter 4: Cellular Respiration
Date __________________
Section 4.4: Overview of Cellular Respiration
Main Ideas:
 Cellular respiration makes ATP by breaking down sugars
 Cellular respiration is the reverse process of Photosynthesis
Vocabulary:
Cellular respiration
Aerobic
Glycolysis
Anaerobic
Krebs Cycle
1. What is the role of oxygen in our bodies?
2. Plants are autotrophs because they make their own food through __________________________
Animals are heterotrophs because they break down the food for energy through the process of
______________ ___________________
3. What is Cellular Respiration?
4. What is produced that is a form of energy from cellular respiration? _________________
5. If oxygen is needed to break down sugars to produce ATP molecules, we call it _________________
If oxygen is not needed to break down the sugars, it is called ________________________.
6. Where does aerobic cellular respiration take place in eukaryotic cells? _________________________
7. What process starts cellular respiration in all living cells? _____________________________, which
breaks down glucose into 2 ________________________ compounds and makes 2 ______ molecules.
This process takes place in the ______________ of ALL CELLS.
8. Draw Glycolysis in the space below and label the compounds formed.
9. How are chloroplasts and mitochondria related?
10. Where in a mitochondrion does aerobic respiration take place? ________________ membrane & the fill
portion called the __________.
11. The second stage of aerobic respiration is called the Krebs Cycle. Where does it take place? _________
12. In two steps, summarize the Krebs cycle.
a.
b.
13. What important reactant of photosynthesis is released from the Krebs cycle? ____________
What important energy molecule is produced? _____________
Next comes the Electron Chain Reaction (ETC) where electrons released from glucose during Glycolysis and
the Krebs cycle, are passed from one molecule to another, slowly releasing energy.
14. Summarize the ETC in tow steps.
a.
b.
15. What are the end products of the ETC? _______ & ______________
16. What was released from the Krebs cycle? _______
17. Write out the formula for Aerobic cellular respiration in the space below
18. Label the chloroplast and the mitochondrion below and indicate the products and the reactants of
photosynthesis and respiration. Show what goes in and what comes out of each with arrows
Section 4.6: Fermentation
Main Ideas:
 Fermentation allows glycolysis to continue in the absence of oxygen
 Fermentation and its products are important in the brewing, baking and food industries
Vocabulary:
 Fermentation
 Lactic Acid
 Alcohol
1. Give an example when your muscles were undergoing fermentation.
2. What is fermentation?
3. When will fermentation occur?
4. When glycolysis occurs, a glucose molecule is broken down into two molecules of a 3 carbon compound
called pyruvate. When oxygen is not present, the pyruvate molecules will become
__________________. This is what builds up in your muscles when you aren’t breathing while doing
strenuous activities. Since it is an acid, you will FEEL THE __________!
5. Name some food products made through the process of bacteria & yeast undergoing fermentation.
6. Alcoholic fermentation depends on yeast cells breaking glucose down during glycolysis into two
molecules of __________________ and releasing 2 molecules of _______ gas.
7. Using the figures of fermentation from your book, label the simplified diagram of fermentation below
C
Lactic Acid Fermentation
Alcoholic Fermentation
Glycolysis