1. Homework is for more practice will be the study guide for section 4-4.
4.4 Cellular Respiration
Purpose today is to understand the steps of cell respiration, to show this understanding you will fill in the notes and be able to label the diagram of the mitochondria showing the steps. You will need to show me for a stamp that the picture is completed before leaving.
Homework is for more practice will be the study guide for section 4-4.

2. Cellular respiration
Cellular respiration is a process in all eukaryotes that breaks down sugars and other carbon-based molecules to make ATP when oxygen is present. 1

3. Because cellular respiration needs oxygen, it is an aerobic (requires oxygen) process.
In eukaryotic cells, the aerobic parts of the process take place in mitochondria.
mitochondrion
animal cell 2

4. The step that leads to cellular respiration takes place in the cytoplasm and is anaerobic (no oxygen) 3

5. Glyco = glucose Lysis = break down
The anaerobic process that leads to cellular respiration is called glycolysis.
Glyco = glucose Lysis = break down 4

6. In glycolysis, two ADP molecules are used to split a molecule of glucose into three-carbon molecules, which produces two ATP molecules. 5

7. energy from glycolysis
Glycolysis yields a net increase of two ATP molecules. Then, if oxygen is available, the products of glycolysis are used in cellular respiration.
6H O 2
6CO 6O
mitochondrion
matrix (area enclosed
by inner membrane)
inner membrane
ATP
energy
energy from glycolysis 1 4 3
and 6

8. Aerobic With oxygen Cell Respiration
VOCABULARY CHECK For each of the terms write a short precise stage that describes its meaning. For example a short phrase to describe ATP could be “energy for cells”
Cell Respiration
Produces ATP when oxygen is available
Aerobic
With oxygen

9. Glycolysis No oxygen Anaerobic
VOCABULARY CHECK For each of the terms write a short precise stage that describes its meaning. For example a short phrase to describe ATP could be “energy for cells”
Anaerobic
No oxygen
Breaks glucose , creates ATP
Glycolysis

10. Produces ATP when oxygen is available
CHECK
What is cell respiration?
Produces ATP when oxygen is available

11. CHECK
Where does the anaerobic stage take place?
In the cytoplasm

12. Breaks glucose , creates ATP
CHECK
What does glycolysis do?
Breaks glucose , creates ATP

13. Cellular respiration takes place in two general stages, in two different parts of the mitochondria7

15. The Krebs cycle is a series of chemical reactions that further breaks down the 3-carbon molecules from glycolysis. 8

16. The Krebs cycle takes place in the matrix, or interior space, of mitochondria.9

17. These chemical reactions produce carbon dioxide, a small number of ATP molecules, and energy-carrying molecules that are used in the second stage of cellular respiration. 10

18. • An electron transport chain uses the energy-carrying molecules from the Krebs cycle to produce a large number of ATP molecules. 11

19. Water, which is released as a waste product, is also formed
Water, which is released as a waste product, is also formed. The electron transport chain is in the inner mitochondrial membrane. 12

20. The overall, simplified chemical equation for the cellular respiration process is
Glucose + Oxygen = Carbon Dioxide + Water + Energy
C6H12O6 + 6O2 = 6CO2 + 6H2O + Energy 13

21. Occurs in Matrix (the liquid)
Diagram of the Process
Occurs across Cristae (folded mitochondria membrane)
Occurs in Cytoplasm
Occurs in Matrix (the liquid)

22. Glycolysis must take place first.
anaerobic process (does not require oxygen)
takes place in cytoplasm
splits glucose into two three-carbon molecules
produces two ATP molecules

23. energy from glycolysis
The Krebs cycle transfers energy to an electron transport chain.
takes place in mitochondrial matrix
breaks down three-carbon molecules from glycolysis
6H O 2
6CO 6O
mitochondrion
matrix (area enclosed
by inner membrane)
inner membrane
ATP
energy
energy from glycolysis 1 4 3
and
makes a small amount of ATP
releases carbon dioxide
transfers energy-carrying molecules

24. energy from glycolysis
The electron transport chain produces a large amount of ATP.
takes place in inner membrane
energy transferred to electron transport chain
oxygen enters process
ATP produced
6H O 2
6CO 6O
mitochondrion
matrix (area enclosed
by inner membrane)
inner membrane
ATP
energy
energy from glycolysis 1 4 3
and
Electron Transport
water released as a waste product

25. The equation for cellular respiration: C6H12O6 + 6O2  6CO2 + 6H2O
The reactants in photosynthesis are the same as the products of cellular respiration.

27. energy from glycolysis
6H O 2
6CO 6O
mitochondrion
matrix (area enclosed
by inner membrane)
inner membrane
ATP
energy
energy from glycolysis 1 4 3
and