1. Biology Unit Three Part II - Energy
Mrs. Pearson’s First Semester Biology
*For those watching by recording, watch for questions on the slides throughout
the presentation. me the answers to the questions within two days of the
lesson being presented in order to receive credit for watching the recording.

2. Biology Olympics! Note taking – Make your own test questions:
Use the bold titles in your reading to help you find the main ideas for test questions:

4. Turn it into a question How does cellular respiration make ATP?
What does cellular respiration use to make ATP?
When cellular respiration breaks down sugars, what is made?

5. Use the bold words to make your own matching question.
Put the bold words on flash cards to practice the meanings.
ONLY practice the ones you don’t know.

6. KEY CONCEPT The overall process of cellular respiration converts sugar into ATP using oxygen.

7. Lesson Objectives
Describe the processes and products of cellular respiration.

8. Pearson’s Perfectly Pleasant Prefixes and Parts
Aero –
- lysis or - lytic
An –

9. An organism that cannot make its own food uses the process of cellular respiration to make its energy.

10. Cellular respiration makes ATP by breaking down sugars.
Cellular respiration is aerobic, or requires oxygen.
Aerobic stages take place in mitochondria.
mitochondrion
animal cell
**Those watching by recording, include in your why we call mitochondria the “Mighty Mitochondria.”

11. 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 which start the Kreb Cycle
How many carbon dioxide (CO2) molecules can be made from one glucose molecule if you have plenty of oxygen?

12. Cellular respiration is like a mirror image of photosynthesis.
The Krebs cycle transfers energy to an electron transport chain. (Matrix)
breaks down pyruvate 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
Krebs Cycle
Makes one CO2 and a two
carbon chain
Where does the carbon dioxide go?
makes a small amount of ATP which goes to the electron transport chain

13. energy from glycolysis
The electron transport chain produces a large amount of ATP.
oxygen enters process
ATP produced in large amounts
6H O 2
6CO 6O
mitochondrion
matrix (area enclosed
by inner membrane)
inner membrane
ATP
energy
energy from glycolysis 1 4 3
and
water released as a waste product
Where does the water go?
The breakdown of one glucose molecule produces up to 38 molecules of ATP.
Electron Transport
**Those watching by recording, include in your how many ATP molecules are made from one glucose molecule.

14. Say that again?!
First glycolysis (breaking glucose into two 3-carbon molecules) takes place in the cytoplasm and produces two ATP that go to the Kreb Cycle.
Then the Kreb Cycle uses that ATP to break down the two three-carbon molecules left over from glycolysis to produce a small amount of ATP for the electron transport chain. Carbon dioxide is given off as a waste product.
Finally, the electron transport chain uses that ATP along with oxygen to produce large amounts of ATP and water is given off as a waste product.

15. The equation for the overall process is:
C6H12O6 + 6O2  6CO2 + 6H2O
The reactants in photosynthesis are the same as the products of cellular respiration.
**Those watching by recording, include in your the equation for cellular respiration and how it compares to the equation for photosynthesis.

16. Review
An organism that cannot make its own food uses the process of cellular respiration to make its energy.
Cellular respiration makes ATP by breaking down sugars.
Cellular respiration is like a mirror image of photosynthesis.
C6H12O6 + 6O2  6CO2 + 6H2O
The Krebs cycle transfers energy to an electron transport chain.
The electron transport chain produces a large amount of ATP.
Fermentation allows glycolysis to continue making ATP when oxygen is unavailable.

17. Questions?