BIOL251 - EXAM #2 (CHAPTER 9) QUESTIONS WITH
CORRECT ANSWERS 2026 RATED A+
1. Cellular Respiration-ANSWER- - set of reactions that uses electrons from high-energy
molecules to make ATP
2. What is req. for cellular respiration to occur?-ANSWER- - Energy to generate ATP- Source of
carbon
3. Glycolysis-ANSWER- - six-carbon glucose is broken down into two three-carbon pyruvate-
regulated by feedback inhibition
4. Pyruvate processing-ANSWER- Each pyruvate is oxidized to form acetyl CoA
5. Citric Acid Cycle-ANSWER- each acetyl CoA is oxidized to CO2
6. Oxidative Phosphorylation and Electron Transport Chain-ANSWER- Electrons move through a
transport chain and their energy is used to set up a proton gradient, which is used to make ATP
7. Where does each phase occur in a cell (Glycolysis, Pyruvate Processing, Citric
Acid Cycle, OP & ETC)-ANSWER- Glcolysis = Cytosol
Pyruvate Processing = mitochondrial matrix
Citric Acid cycle = mitochondrial matrix
OP & ETC = mitochondrial matrix
8. Pyruvate Dehydrogenase-ANSWER- Enzyme where Pyruvate undergoes a series of reactions-
One of its carbons is oxidized to CO2- NADH is produced- The remaining two-carbon unit is
attached to coenzyme A, producing acetyl CoA
9. Chemiosmosis-ANSWER- - Protons move through a proton channel in ATP synthase- Driving
the production of ATP from ADP and Pi
10. ATP Synthase-ANSWER- enzyme that synthesizes ADP into ATP
11. Fermentation-ANSWER- - a metabolic pathway that regenerates NAD+ from NADH-
Electrons from NADH are transferred to pyruvate- 2 ATP per glucose molecule
12. Cytosol-ANSWER- glycolysis takes place
13. Mitochondrial Matrix-ANSWER- Citric acid cycle and pyruvate processing take place
CORRECT ANSWERS 2026 RATED A+
1. Cellular Respiration-ANSWER- - set of reactions that uses electrons from high-energy
molecules to make ATP
2. What is req. for cellular respiration to occur?-ANSWER- - Energy to generate ATP- Source of
carbon
3. Glycolysis-ANSWER- - six-carbon glucose is broken down into two three-carbon pyruvate-
regulated by feedback inhibition
4. Pyruvate processing-ANSWER- Each pyruvate is oxidized to form acetyl CoA
5. Citric Acid Cycle-ANSWER- each acetyl CoA is oxidized to CO2
6. Oxidative Phosphorylation and Electron Transport Chain-ANSWER- Electrons move through a
transport chain and their energy is used to set up a proton gradient, which is used to make ATP
7. Where does each phase occur in a cell (Glycolysis, Pyruvate Processing, Citric
Acid Cycle, OP & ETC)-ANSWER- Glcolysis = Cytosol
Pyruvate Processing = mitochondrial matrix
Citric Acid cycle = mitochondrial matrix
OP & ETC = mitochondrial matrix
8. Pyruvate Dehydrogenase-ANSWER- Enzyme where Pyruvate undergoes a series of reactions-
One of its carbons is oxidized to CO2- NADH is produced- The remaining two-carbon unit is
attached to coenzyme A, producing acetyl CoA
9. Chemiosmosis-ANSWER- - Protons move through a proton channel in ATP synthase- Driving
the production of ATP from ADP and Pi
10. ATP Synthase-ANSWER- enzyme that synthesizes ADP into ATP
11. Fermentation-ANSWER- - a metabolic pathway that regenerates NAD+ from NADH-
Electrons from NADH are transferred to pyruvate- 2 ATP per glucose molecule
12. Cytosol-ANSWER- glycolysis takes place
13. Mitochondrial Matrix-ANSWER- Citric acid cycle and pyruvate processing take place
