1. Bell Work!
What is Cellular respiration?

2. Cellular Respiration
Ch 8.3

3. Adenosine DiPhosphate Adenosine TriPhosphate
Using ATP to do work
Can’t store ATP it is too unstable
Only used in the cell that made it
ATP
work
Adenosine DiPhosphate
Adenosine TriPhosphate
ADP

4. Cellular Respiration Breaking down food to produce ATP
in the mitochondria
uses oxygen

5. Cell Respiration Check!
What reactants go into Cellular Respiration?
What products come out of Cellular Respiration?
How does the formula for Cellular respiration relate to the formula for photosynthesis?

6. Cellular Respiration: Overview

7. Glycolysis Breaks 1 Glucose into 2 Pyruvate Occurs in the Cytoplasm.
Makes 2 ATP molecules
Makes 2 NADH

8. Copy This Table to your notes!
Process
ATP
NADH
FADH2
CO2
Glycolysis 2 --
Krebs Cycle
Electron Transport
Chain

9. Quick Quiz! What is the starting molecule for respiration?
What process splits glucose?
What molecules are created in glycolysis?
Overall, how many ATP are produced in glycolysis?
Glucose
Glucose
NADH, FADH, Pyruvate 2

10. Mitochondria Structure
Smooth outer membrane
Cristae -Highly folded inner membrane
Intermembrane space – fluid filled between membranes
Matrix inner fluid filled space

11. Krebs cycle
Aerobic -If oxygen is present the pyruvate will continue to the Krebs cycle.
Occurs in the mitochondria
2 cycles of Krebs cycle per glucose

12. Krebs Cycle Per glucose the Krebs cycle makes: 6 CO2 molecules, 2 ATP,
8 NADH,
2 FADH2.

13. Copy This Table to your notes!
Process
ATP
NADH
FADH2
CO2
Glycolysis 2 --
Krebs Cycle 8 6
Electron Transport
Chain

14. Quick Quiz! In which organelle does the Krebs cycle take place?
What are the products of the Krebs cycle?
How much ATP is produced in the Krebs cycle?
mitochondria
NADH, ATP, FADH2, & CO2
1 (x2 because 2 pyruvate)

15. Electron Transport Chain
Final step in Cell respiration
32 ATP
made
from
NADH
and
FADH2

16. Electron Transport Chain
Electrons move down the chain
protons
move
Across
the
membrane
Building proton gradient!

17. Chemiosmosis A proton gradient is set up
Proton move through ATP synthase
Makes ATP

18. Copy This Table to your notes!
Process
ATP
NADH
FADH2
CO2
Glycolysis 2 --
Krebs Cycle 8 6
Electron Transport
Chain 34
Total of 38 ATP made for every glucose!

19. Quick Quiz!
Which molecules move from the Krebs cycle to the electron transport chain?
What protein is powered by the H+ gradient?
How many ATP are produced by ETC?
NADH, FADH2
ATP Synthase
~34 ATP

20. Overview Cellular Respiration
~38 ATP
Overview Cellular Respiration + +
2 ATP
2 ATP
~34 ATP

21. What if oxygen is missing?
No oxygen = Anaerobic respiration
Fermentation: 2 types
Alcohol fermentation
Lactic Acid fermentation
Doesn’t make
much ATP

22. Fermentation Alcohol fermentation Yeast Glucose  ATP + CO2 + alcohol
Lactic Acid Fermentation
Bacteria, Animals
Glucose  ATP + Lactic Acid

23. Glycolysis, Krebs cycle, electron transport chain
Quick Quiz!
If there is no ____, pyruvate goes on to __________ instead of the Krebs cycle.
In total, how many ATP are produced in cellular respiration?
What are the three steps of cellular respiration?
Oxygen, fermentation
~ 38 ATP
Glycolysis, Krebs cycle, electron transport chain