BIO 107 EXAM 2 QUESTIONS WITH
CORRECT ANSWERS
What is the formula for cellular respiration? - Correct Answers -C6H12O6 + 6O2 -->
6CO2 + 6H2O + ATP + NADH
Which molecule is oxidized in cellular respiration? - Correct Answers -Glucose
(C6H12O6)
When oxidized, what does glucose become? - Correct Answers -6 O2 (carbon dioxide)
Where does cell reaction #1 (glycolysis) occur? - Correct Answers -In the cytosol
Where does cell reaction #3 occur? - Correct Answers -In the mitochondria
What is stage one of cellular respiration and what is its purpose? - Correct Answers -
Glycolysis; to break down glucose into 2 ATP and 2 NADH
What is stage two of cellular respiration and what is its purpose? - Correct Answers -
Pyruvate oxidation; to strip electrons from pyruvate and send them to the ETC
What is stage three of cellular respiration and what is its purpose? - Correct Answers -
Citric Acid Cycle; to produce electrons for the electron transport chain
What is stage four of cellular respiration and what is its purpose? - Correct Answers -
Oxidative phosphorylation; to produce ATP and pump protons across the membrane
What does anaerobic mean? - Correct Answers -Without oxygen
What does aerobic mean? - Correct Answers -With oxygen
What part of the cell cannot be involved in these processes if oxygen is not available? -
Correct Answers -The mitochondria cannot be involved
What is the reactant for glycolysis? - Correct Answers -Glucose is the reactant
What is the product of glycolysis? - Correct Answers -2 pyruvate (2 ATP, 2 NADH)
, What happens in the "energy investment" phase of glycolysis? - Correct Answers -
Glucose is energized using ATP phosphate groups and six carbon intermediates split
into 2 three carbon intermediates
What is the overall net production from glycolysis? - Correct Answers -2 ATP and 2
NADH per glucose
What other product is produced in glycolysis? - Correct Answers -Pyruvate
What happens to the electrons lost from pyruvate when oxidized? - Correct Answers -
They are added to NAD+ and sent to the ETC
What is the reactant of pyruvate oxidation? - Correct Answers -Pyruvate is the reactant
What is the product of pyruvate oxidation? - Correct Answers -2 Acetyl CoA, 2 NADH, 2
CO2
For every 1 molecule of glucose, how many NADH molecules are produced in pyruvate
oxidation? - Correct Answers -4 NADH
Where in the cell is pyruvate oxidized? - Correct Answers -In the mitochondria
What is pyruvate converted into? How many? - Correct Answers -2 Acetyl CoA
What is the purpose of the ETC between the two photosystems? - Correct Answers -It
pumps protons from the stroma into the thylakoid space (photophosphorylation)
What is the benefit of photosynthesis creating some ATP by photophosphorylation? -
Correct Answers -It helps to store energy
What are the electron donors and final electron acceptors in the light reactions? -
Correct Answers -The electron donor is water, and the final electron acceptor is NADP+
How many NADH and FADH2 molecules are produced by the citric acid cycle for every
glucose molecule metabolized? - Correct Answers -10 NADH and 2 FADH2 molecules
per one glucose molecule
How many ATP molecules are produced by the citric acid cycle for every glucose
molecule metabolized? - Correct Answers -2 ATP molecules are produced
Where do NADH and FADH2 take charged electrons at the end of the citric acid cycle?
- Correct Answers -To the ETC (electron transport chain)
Which molecule catches "spent" electrons in oxidative phosphorylation? Why is it the
best molecule for the job? - Correct Answers -Oxygen; it is highly electronegative
CORRECT ANSWERS
What is the formula for cellular respiration? - Correct Answers -C6H12O6 + 6O2 -->
6CO2 + 6H2O + ATP + NADH
Which molecule is oxidized in cellular respiration? - Correct Answers -Glucose
(C6H12O6)
When oxidized, what does glucose become? - Correct Answers -6 O2 (carbon dioxide)
Where does cell reaction #1 (glycolysis) occur? - Correct Answers -In the cytosol
Where does cell reaction #3 occur? - Correct Answers -In the mitochondria
What is stage one of cellular respiration and what is its purpose? - Correct Answers -
Glycolysis; to break down glucose into 2 ATP and 2 NADH
What is stage two of cellular respiration and what is its purpose? - Correct Answers -
Pyruvate oxidation; to strip electrons from pyruvate and send them to the ETC
What is stage three of cellular respiration and what is its purpose? - Correct Answers -
Citric Acid Cycle; to produce electrons for the electron transport chain
What is stage four of cellular respiration and what is its purpose? - Correct Answers -
Oxidative phosphorylation; to produce ATP and pump protons across the membrane
What does anaerobic mean? - Correct Answers -Without oxygen
What does aerobic mean? - Correct Answers -With oxygen
What part of the cell cannot be involved in these processes if oxygen is not available? -
Correct Answers -The mitochondria cannot be involved
What is the reactant for glycolysis? - Correct Answers -Glucose is the reactant
What is the product of glycolysis? - Correct Answers -2 pyruvate (2 ATP, 2 NADH)
, What happens in the "energy investment" phase of glycolysis? - Correct Answers -
Glucose is energized using ATP phosphate groups and six carbon intermediates split
into 2 three carbon intermediates
What is the overall net production from glycolysis? - Correct Answers -2 ATP and 2
NADH per glucose
What other product is produced in glycolysis? - Correct Answers -Pyruvate
What happens to the electrons lost from pyruvate when oxidized? - Correct Answers -
They are added to NAD+ and sent to the ETC
What is the reactant of pyruvate oxidation? - Correct Answers -Pyruvate is the reactant
What is the product of pyruvate oxidation? - Correct Answers -2 Acetyl CoA, 2 NADH, 2
CO2
For every 1 molecule of glucose, how many NADH molecules are produced in pyruvate
oxidation? - Correct Answers -4 NADH
Where in the cell is pyruvate oxidized? - Correct Answers -In the mitochondria
What is pyruvate converted into? How many? - Correct Answers -2 Acetyl CoA
What is the purpose of the ETC between the two photosystems? - Correct Answers -It
pumps protons from the stroma into the thylakoid space (photophosphorylation)
What is the benefit of photosynthesis creating some ATP by photophosphorylation? -
Correct Answers -It helps to store energy
What are the electron donors and final electron acceptors in the light reactions? -
Correct Answers -The electron donor is water, and the final electron acceptor is NADP+
How many NADH and FADH2 molecules are produced by the citric acid cycle for every
glucose molecule metabolized? - Correct Answers -10 NADH and 2 FADH2 molecules
per one glucose molecule
How many ATP molecules are produced by the citric acid cycle for every glucose
molecule metabolized? - Correct Answers -2 ATP molecules are produced
Where do NADH and FADH2 take charged electrons at the end of the citric acid cycle?
- Correct Answers -To the ETC (electron transport chain)
Which molecule catches "spent" electrons in oxidative phosphorylation? Why is it the
best molecule for the job? - Correct Answers -Oxygen; it is highly electronegative
