1. Metabolism for cellular energy Chapter 9
Cellular Respiration
Metabolism for cellular energy
Chapter 9

2. Chemical Energy
Why do we eat? We need to __________ food so we can break it down into usable ________, like glucose.
The amount of energy we can get from food is ___________ by the amount of calories it _________.
___________ = amount of energy needed to raise the temperature of 1g of ______ by 1 degree Celsius.
You do not literally “burn” through the glucose in your food, your cells _________ release the energy it contains.

3. Mitochondria The site of cellular respiration:
Organelle: AKA- ___________________ of the cell
Structure: made of ____ membranes (inner and outer)
Inner membrane contains a matrix surrounded by cristae

4. Respiration Formula
Cellular Respiration means to _________ energy by breaking down ______ molecules in the presence of ________.
Formula:
C6H12O6 + 6O2 = 6H2O + energy (heat and _____)

5. Overview of cycle
Glucose + oxygen  ____________________ + water + energy
Mitochondria perform respiration so we get energy, we breathe _____ carbon dioxide and water.

6. Chemical Pathways
Just like photosynthesis, there are several steps to respiration:
1.) Glycolysis
2.) Krebs Cycle (______________ cycle)
3.) Electron Transport Chain (______)

7. 2 pyruvic acids produced
Glycolysis
Occurs in the __________ outside the mitochondria.
Glycolysis: the process of ___________ 1 molecule of glucose into 2 molecules of _________ acid (made of 3 carbon molecule)
2 pyruvic acids produced

8. Glycolysis is a ______ process, it can produce ____________ of ATP molecules in milliseconds!
This step of respiration does not require oxygen (__________)
Because glycolysis is so fast, the cell ______ up its available NAD+ quickly, and then ATP production will ______ unless more is made.

9. Krebs Cycle
The pyruvic acid made during _____________ is used to make CO2, NADH, ATP, and FADH2 _________ the mitochondria
The NAD+ molecule ________/hold onto electrons as NADH until they are needed for other molecules.
Just like the NADP+ used in photosynthesis

10. Krebs Cycle: AKA- Citric Acid Cycle
In the mitochondria _______, the 3-carbon pyruvic acid __________ molecules of CO2 and become Acetyl-CoA (citric acid)
Products made: NADH, FADH2, 2 ATP

11. Electron Transport Chain
Remember the ETC in photosynthesis:
The ETC uses the high-_______ electrons from the Kreb’s Cycle to convert ____ to ATP.
High energy electrons come from NADH and FADH+
The ETC is in the cell ____________ for prokaryotes

12. Fermentation
When oxygen is ____ present, glycolysis is followed by fermentation, an __________ process.
Alcoholic Fermentation: done by _______ in bread.
Pyruvic acid + NADH = _______ alcohol + CO2 + NAD+
Lactic Acid Fermentation: occurs when you’re exercising ________ and cannot supply your muscles with enough oxygen.
Pyruvic acid + NADH = lactic acid + NAD+
Results in muscle __________

13. One man’s trash is another man’s treasure!
The ____________ of photosynthesis are the reactants of respiration.
The products of respiration are the _____________ of photosynthesis.

14. Net Results Photosynthesis (chloroplast) = Glucose total: 1
Like “____________” money into a bank
Respiration (mitochondria) = ATP total: 36
Like “_____________” money from a bank