1. Period 3: Take a textbook and turn to page 115.
Period 4: Take out your book and turn to page 69

2. How are combustion and cellular respiration alike
How are combustion and cellular respiration alike? How are they different?
Both are chemical reactions that use oxygen to release energy; both produce heat.
Cellular respiration releases energy slowly, with many reactions, while combustion releases energy as heat and light all at once

3. KEY CONCEPT Cellular respiration is an aerobic process with two main stages.

4. Glycolysis is needed for cellular respiration.
The products of glycolysis enter cellular respiration when oxygen is available.
two ATP molecules are used to split glucose
four ATP molecules (2 net) are produced
two molecules of NADH produced
two molecules of pyruvate produced

5. The Krebs cycle (citric acid cycle) is the first main part of cellular respiration.
Pyruvate is broken down before the Krebs cycle.
**carbon dioxide released
NADH produced
coenzyme A (CoA) bonds to two-carbon molecule

6. The Krebs cycle produces energy-carrying molecules.

7. The Krebs cycle produces energy-carrying molecules.
NADH and FADH2 are made
intermediate molecule with CoA enters Krebs cycle
citric acid (six-carbon molecule) is formed
citric acid is broken down, carbon dioxide is released, and NADH is made
five-carbon molecule is broken down, carbon dioxide is released, NADH and ATP are made
four-carbon molecule is rearranged

8. The electron transport chain is the second main part of cellular respiration.
The electron transport chain uses NADH and FADH2 to make ATP.
#1: high-energy electrons removed from NADH and FADH2 enter electron transport chain
#2 energy from electrons in the electron transport chain is used to pump hydrogen ions (H+) across the inner mitochondrial membrane
#3. hydrogen ions (H+) flow through a channel in the membrane (ATP synthase), and ATP molecules are produced
#4: Oxygen picks up electrons that went through the electron transport chain and hydrogen ions (H+)

9. The electron transport chain is the second main part of cellular respiration.
The electron transport chain uses NADH and FADH2 to make ATP.
The breakdown of one glucose molecule produces up to 38 molecules of ATP.
ATP synthase produces ATP
oxygen picks up electrons and hydrogen ions
water is released as a waste product

10. Does cellular respiration takes place only in animal cells?
Cellular respiration takes place in almost all organisms!
The cells of all eukaryotes have mitochondria.
Cellular respiration takes place in many prokaryotic organisms as well, although they do not have mitochondria. The enzymes and transport proteins are found free in the cytoplasm and attached to the cell membrane.

11. Period 3:
Complete the chapter review on page 125, #1-20, Odd numbered questions only!
This will count as a quiz grade.

12. Period 4:
Complete # 1-4 on page 72, “The big picture”

13. Period 4:
Complete the Chapter 4 review, THIS WILL COUNT AS A QUIZ GRADE