1. How do cells store energy?
Phosphate
Adenosine
Energy is released when this specific bond is broken*
Phosphate
Energy
Adenosine
what is the difference between ATP and ADP?
which one is low energy? which one is high energy?
like a bomb that can go off. that energy is used to do things in the cell.
3rd bond is very easy to break
what can you use this energy for? energy released for cell funtions, etc. GIVE EXAMPLES!!!!!! Things that we talked about before!!
Energy that comes from breaking down food is used to convert ADP into ATP
Adenosine is a purine nucleoside comprising a molecule of adenine attached to a ribose sugar molecule

2. Cellular Energy is stored through ATP
We need the energy that comes from breaking ATP into ADP in order for
Our Hearts to beat
Our brains to send messages to our bodies
Our muscles to move
ATP stands for
Adenosine Triphosphate
ATP transports chemical energy within cells for metabolism

3. ATP transfers energy from the breakdown of food molecules to cell functions
The ATP Cycle
phosphate removed
draw on the board
Where do molecules from food enter the cycle??

4. How do organisms break down sugars (food) to make ATP?
Process called CELLULAR RESPIRATION
Cellular Respiration is aerobic, or requires oxygen.
Cellular Respiration take place in the mitochondria.
mitochondrion
animal cell
Mitochondria are the power house of the cell. Where all the ATP is made.
think of cellular respiration as the opposite of photosynthesis. Photosynthesis uses energy to make sugars. cellular respiration breaks down sugars to get energy.

5. Cellular Respiration Step 1: “Glycolysis”
6 Carbon Sugar
Purpose: to split glucose into two three-carbon molecules
Anaerobic process (does not require oxygen)
Produces two ATP molecules
Does not make that many ATP. cannot survive on glycolysis alone because it is too slow. we need oxygen. glycolysis purpose is to split glucose to smaller parts so its easier to handle.
asymmetrical, atypical

6. Cellular Respiration Part 2: “Krebs Cycle”
The Krebs cycle breaks down the three-carbon molecules from glycolysis.
takes place in the mitochondrial matrix
6CO 2
mitochondrion
matrix (area enclosed
by inner membrane)
ATP
energy 1 4 3
and
makes a small amount of ATP
releases CO2 as waste
transfers energy-carrying molecules to the next part of cellular respiration
Update drawing
Energy transferred to electron transport chain

7. Cellular Respiration Part 3: “Electron Transport Chain” (ETC)
takes place in inner membrane of mitochondria
energy from the Krebs cycle is transferred to ETC
Oxygen enters process and water is released as waste product
Up to 38 molecules of ATP produced for every one molecule of glucose!
6H O 2 6O
mitochondrion
Electron Transport Chain in the
inner membrane
38 ATP!
energy from Krebs Cycle 4 3
and
electrons move from one protein to the next, towards oxygen at the end.

8. The overall equation for cellular respiration is:
C6H12O6 + 6O2 -> 6CO H2O
Glucose + Oxygen -> Carbon Dioxide+ Water
6H O 2
6CO 6O
mitochondrion
matrix (area enclosed
by inner membrane)
inner membrane
ATP
energy 1 4 3
and
Krebs Cycle
Glycolysis
C6H12O6
arrows = many steps

9. Cellular Respiration Diagram
6H O 2
6CO 6O
mitochondrion
matrix (area enclosed
by inner membrane)
inner membrane
ATP
energy 1 4 3
Cellular Respiration Diagram
2 Three Carbon Molecules 38

11. How are photosynthesis and cellular respiration different?
Think. Pair. Share. Name three similarities and three differences
Copy down the venn diagram from the board