1. April 14, 2011 What are the reactants of photosynthesis? Products?
What are the two steps of photosynthesis?

2. Cellular Respiration Written Equation Balanced Chemical Equation
Glucose + Oxygen  Water + Carbon Dioxide + Energy
Balanced Chemical Equation
C6H12O6 + 6O2  6H2O + 6CO ATP
Energy Transformation
Takes energy of bonds in glucose and puts it into bonds of ATP (Adenosine TRIphosphate)
Reactants
Products

5. ATP ATP is energy “currency”
When energy is needed, ATP gets rid of a phosphate group and becomes ADP.
Breaking the bond to remove the P results in USABLE ENERGY released.
ADP can then be reused in process of cellular respiration!

6. STEP 1: Glycolysis (glyco = sugar, lysis = break)
In cytoplasm of cell
No O2 required
Anaerobic
C6H12O6  2 pyruvates (C3 molecules)
AKA Pyruvic acid
Use 2 ATP  2 ADP
Make 4 ATP from 4 ADP
Gives electrons to NADH to carry to step 3
OVERALL: Makes 2 ATP & 2 molecules (pyruvate) for next step; NADH for step 3

7. NADH is an electron carrier, needed for step 3
STEP 1: Glycolysis
NADH is an electron carrier, needed for step 3

8. STEP 2: Kreb’s Cycle (Citric Acid Cycle)
In matrix of mitochondria
jelly like stuff, similar to cytoplasm
Use 2 pyruvates from glycolysis
Use O2
aerobic
Makes CO2
Makes 2 ATP from 2 ADP
Gives electrons to NADH and FADH2 for step 3
OVERALL: 6 CO2 (waste) & 2 ATP made; NADH & FADH2 for step 3

9. FAD is an electron carrier, needed for step 3
STEP 2: Kreb’s Cycle
FAD is an electron carrier, needed for step 3

10. STEP 3: Electron Transport Chain
In cristae of mitochondria
inner membrane
Series of reactions
H+ pumped out
e- move, generate energy
Uses e- from carriers (NADH and FADH2; steps 1 & 2)
Makes water
Uses O2
Aerobic
Makes 34 ATP from 34 ADP
OVERALL: 6 H2O (waste) & 34 ATP