1. - All organisms need energy from food.
Cell Respiration
- All organisms need energy from food.
They obtain this energy through a
process called cellular respiration.
This is glucose!
It’s food!
It’s organic!

2. - When an organism makes energy,
It is in the form of a molecule called
ATP

4. ADP + P + energy ATP
- ATP is made from a molecule of
ADP and a Phosphate, with the help
of energy released from glucose.
- ATP can be broken back into
ADP and Phosphate to release the
Energy to do cell work.

5. There are two types of respiration:

6. Anaerobic (fermentation): uses no oxygen and produces a
little energy (2ATP) from glucose.
This starts with a process called
glycolysis, where a glucose is
partially broken down to gain 2 ATP
(this occurs in the cytoplasm.)
C6H12O6 + 2 ATP pyruvic acid + 4 ATP
(start-up energy) (a 3 C compound) (a gain of 2 ATP)

7. Some organisms take the pyruvic acid
and break it down into waste products
to be excreted:
Bacteria and yeast mammal muscle
cells
Turns pyruvic acid
Into alcohol and CO2
Turns pyruvic acid
Into lactic acid
Both processes yield/make 2 ATP
Without the use of O2

8. 2. Aerobic cellular respiration:
uses oxygen and produces a lot
of energy (36 ATP) from glucose
(the oxygen helps to completely
break down the glucose.)
Occurs in the mitochondria.
Overall reaction for aerobic respiration:

9. First, glycolysis occurs and yields
2 pyruvic acid and 2 ATP.
Then, Oxygen is used to completely
Break down the pyruvic acid and make
CO2, H2O as wastes and 34 more ATP
This is much more efficient than
anaerobic respiration because 36 ATP
are produced in total.

10. There are 2 processes involved in
extracting all of the energy from
pyruvic acid aerobically:
Krebs Cycle
Electron Transport Chain

11. Don’t show next slide