Name: _______________________________
Cellular Respiration Study Guide
Helpful Hints!!
1. The location, input, and output of each step of cellular respiration.
Glycolysis
Krebs
ETC
cytosol
matrix
Inner mitochonial
Location
membrane
2 atp, glucose
2 pyruvates
6NADH, 4FADH
Input
2 ATP, 2 pyruvates 6 NADH. 4FAD
32ATP, H2O
Output
2. Study the diagrams in your reading packet of each step of respiration.
3. Use the ‘cheat sheet’ that I gave you!!
Chemical Energy and ATP
1. Why is ATP described as the currency of the cell?
Just as we cannot use our dollars in other countries, the cell cannot use the
energy from the bonds of glucose without converting it into ATP
2. Draw the structure of ATP.
3. How is the energy in ATP released?
By breaking off a phosphate to release the energy in the phosphate bond.
4. What type of bonds have to be broken to release the energy in ATP?
Phosphate bonds
5. Describe the relationship between energy stored in food and ATP.
The energy is originally stored in the bonds of food, but must be converted into
ATP to be useable.
6. How does the energy content in carbohydrates, lipids, and proteins differ?
Carbs are good for short term energy but provide less energy than lipids.
Proteins provide about the same amount of energy as carbs.
7. How are ATP and ADP related?
ADP has 2 phosphates, while ATP has 3. ADP can be turned into ATP and ATP
can be turned into ADP.
Cellular Respiration
1. What is the function of Cellular Respiration?
To turn glucose into useable energy…ATP!
2. Explain the difference between aerobic and anaerobic respiration.
Name: _______________________________
Aerobic uses oxygen, while anaerobic does not.
3. Which respiration processes are aerobic? Anaerobic?
Aerobic=Krebs and ETC
Anaerobic=Glycolysis
4. What is the equation for cellular respiration? Connect each of the reactants
and products to Glycolysis, Krebs Cycle, and Electron Transport Chain.
5. Cells produce the most energy in the presence of which molecule?
Oxygen
6. What is the total number of ATP made for each molecule of glucose during
respiration?
32
Glycolysis
1. Where does Glycolysis take place?
In the cytosol
2. What molecules are needed to start Glycolysis (reactants)?
Sugar and 2ATP
3. What are the products of Glycolysis?
2 molecules of pyruvate
4. How is the net amount of ATP made in Glycolysis different from the total
number of ATP produced?
Glycolysis makes 4ATP, but 2 must be used to get started. So, the net amount is
2.
5. Describe where the products of Glycolysis go in the cell.
Into the matrix of the mitochondria
6. What is the main function of Glycolysis?
To break down the sugar
Krebs Cycle
1. Where does the Krebs Cycle take place?
In the matrix of the mitochondria
2. What molecules are needed to start the Krebs Cycle (reactants)?
2 pyruvates
Name: _______________________________
3. What are the products of the Krebs Cycle?
NADH, FADH, 2ATP, CO2
4. Describe how the Krebs Cycle and Glycolysis are related.
Krebs Cycle uses the products of Gycolysis
5. What is the role of NADH and FADH2?
Carries electrons to the Electron Transport Chain
6. What is the name of the 6 Carbon molecule that forms when Acetyl-CoA
joins 2 Carbons to a 4 Carbon molecule?
Citric Acid
7. What is the main function of the Krebs Cycle?
To build electron carriers for the ETC
Electron Transport Chain
1. Where does the Electron Transport Chain take place?
The inner membrane of the mitochondria
2. What molecules are needed to start the Electron Transport Chain
(reactants)?
NADH, FADH
3. What are the products of the Electron Transport Chain?
ATP
4. Describe how the Electron Transport Chain and Krebs Cycle are related.
The ETC needs electrons to be transported by NADH and FADH
5. Explain the functions of electrons, hydrogen ions, and oxygen in the ETC.
Electrons are passed down the ETC, hydrogen ions are pumped up the
concentration gradient and then flow down the gradient to create the energy
needed to put one more phosphate on to ADP. Oxygen catches the electron to
make water.
6. What is the role of ATP synthase in the ETC?
To attach the third phosphate to ADP
7. What molecule in the final electron acceptor at the end of the ETC?
Oxygen
8. Where do the extra carbon atoms in pyruvic acid end up?
In CO2 in the atmosphere
9. What is the main function of the ETC?
To attach a phosphate to ADP to make ATP
Name: _______________________________
Label the following image:
Anaerobic Respiration
1. Where does anaerobic respiration take place?
In the cytosol
2. When does anaerobic respiration take place?
After glycolysis if oxygen is not available
3. Describe how fermentation and glycolysis are related.
Both do not use oxygen and fermentation takes place after glycolysis
4. What are the two types of fermentation? What are the products for each?
Alcoholic produces CO2 and alcohol and lactic acid produces lactic acid
5. How many molecules of ATP are produced in fermentation?
2
6. What are some real world applications for each type of fermentation?
Make break rise, wine, alcohol, root beer 
7. What are ways that aerobic and anaerobic respiration are similar? How are
they different?
Same: both are a part of cellular respiration
Different: Oxygen