1. Chemical Reactions and Cell Processes
Cellular Respiration
Chemical Reactions and Cell Processes
Mitochondrion

2. Structure of a mitochondrion
Matrix (fluid inside inner membrane)
outer membrane
Intermembrane space
inner membrane

3. Respiration
Cellular respiration is the process that converts oxygen and sugar (glucose) into water, carbon dioxide, and energy (ATP).

4. Respiration Equation:
6O2 + C6H12O6 → 6CO2 + 6H2O + Energy (ATP)
carbon dioxide
water
oxygen
sugar (glucose)
energy

5. Respiration Equation:
6O2 + C6H12O6 → 6CO2 + 6H2O + Energy (ATP)
carbon dioxide
water
oxygen
sugar (glucose)
energy
Reactants
Products

6. What organisms’ cells go through respiration?
All eukaryotes (animals, plants, fungi, and protista)

7. Steps of Cellular Respiration
1. Glycolysis
2. Kreb’s Cycle
(Citric Acid Cycle)
3. Electron Transport Chain

8. Glucose (6-carbons) broken into 2 pyruvic acids (3-carbons)
Step 1: Glycolysis
Glyco = glucose (sugar)
Lysis = split or break up
Occurs in cytoplasm of a eukaryotic cell
Glucose (6-carbons) broken into 2 pyruvic acids (3-carbons)

9. Glucose (6-carbons) broken into 2 pyruvic acids (3-carbons)
Step 1: Glycolysis
Glucose
(6 carbons)
2 pyruvic acids
(3 carbons)
Glucose (6-carbons) broken into 2 pyruvic acids (3-carbons)

10. Glycolysis occurs in cytoplasm

11. Step 2: Kreb’s Cycle AKA (Citric Acid Cycle)
Occurs in matrix
1. 1 carbon from pyruvic acid used to make carbon dioxide
2. The other 2 carbons from pyruvic acid used to make citric acid
3. 2 other carbons from citric acid leave to form 2 more carbon dioxides
Citric acid then becomes a 4-carbon molecule to start the process again

12. Step 2: Kreb’s Cycle + + pyruvic acid Carbon dioxide Citric Acid
(3 carbons) + +
Carbon dioxide
Citric Acid
= oxygen
= carbon

14. Step 3: Electron Transport Chain
e- from NADH go to electron carrier
e- travel through ETC and force H+ into intermembrane space
e- reaches last electron carrier and combines H+ and O2 to make H2O
Intermembrane space is hypertonic so H+ travel through ATP synthase to matrix
ATP synthase joins ADP and Phosphate to create ATP

15. Step 3: Electron Transport Chain (ETC)

16. Glycolysis Electrons carried in NADH Pyruvic acid Cytoplasm
in NADH and
FADH2
Pyruvic acid
Glycolysis
Cytoplasm
Mitochondrion