Lecture 2

Question 1

Oxidation

Answer 1

3 simple rules you need to know:

1. GAIN of Oxygen
2. LOSS of Hydrogen
3. LOSS of electrons

FADH2 –> FAD

Question 2

Reduction

Answer 2

3 rules:

1. LOSS of Oxygen
2. GAIN Hydrogen
3. GAIN electron

NAD+ –> NADH

Question 3

Cellular Respiration

Answer 3

“Is just a huge oxidation/reduction reaction”

[C6H12O6 + 6 O2 —> 6 CO2 + 6 H2O]

Glucose + oxygen —> CO2 + water: “Glucose is oxidized to CO2 and oxygen is reduced to water”

Electron carriers to allow this to happen:
——> NAD&FADH2

Question 4

Cellular Respiration Overview (must know)

Answer 4

Process ——– location —— O2 needed

Glycolysis —— cytosol ——— NO (anaerobic)
PDC/Krebs —– mito. matrix ——- yes, indirect
ETC/Ox. Phos. – mito. Inner mem. ——— yes

Question 5

Cellular respiration overview (cont.)

What happens to the carbon chain in the pathway?
Where is energy entering/leaving pathway?
Enzyme names
Regulatory points

Answer 5

1. Glucose (6C) –> fructose –> GAP (3C) –> PEP –> pyruvate (glycolysis)

1st phase: 2 ATP in (2 ADP + Pi out)
2nd phase: 4 ATP + 2 NADH out (4 ADP&2 NAD+ in)

🔄NET: 2 ATP + 2 NADH + 2 pyruvate

Kinase: enzyme that phosphorylates; KNOW enzyme names & regulatory enzymes (-dG)

Question 6

Electron transport chain

Answer 6

Fill in

Question 7

PDC/Krebs

Answer 7

Fill in

Question 8

ATP COUNT OVERALL

Answer 8

💥💥💥💥

Question 9

Fermentation

Answer 9

No oxygen means:

• No ETC/Oc phosphorylation
• No PDC
• Theoretically no glycolysis

Know how: Yeast and lactic acid