Chapter9
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43 Terms
What is the primary purpose of cellular respiration?
To produce ATP from organic molecules
Which of the following is TRUE about redox reactions?
Oxidation and reduction occur simultaneously
What is the role of NAD in cellular respiration?
It acts as an electron shuttle between reactions
Which of the following statements about glycolysis is correct?
It produces a net gain of 2 ATP per glucose molecule
where does light dependent reaction occur?
Stroma (fluid surrounding the thylakoid)
here does light independent reactions occur?
in the thylakoid (green stacked sacks )
What is the main purpose of the citric acid cycle?
To generate NADH and FADH₂ for the electron transport chain
Which molecule is reduced in aerobic cellular
oxygen
What is the final electron acceptor in the electron transport chain?
oxygen
where does glycolysis occur in the cell?
in the cytoplasm
where does the Krebs cycle occur?
mitochondrial matrix
where does the electric transport chain occur?
Cristae (mitochondrial membrane)
What is the primary purpose of cellular respiration?
To produce ATP from organic molecules
Which of the following is a reactant in cellular respiration?
Glucose
What is the overall equation for cellular respiration?
C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + ATP
Which of the following statements about redox reactions is correct?
Oxidation and reduction occur simultaneously
What is the role of NAD in cellular respiration?
it acts as an electron shuttle between reactions
Which of the following statements about glycolysis is correct?
It produces a net gain of 2 ATP per glucose molecule
What is the main purpose of the citric acid cycle?
To generate NADH and FADH₂ for the electron transport chain
Which molecule is reduced to aerobic cellular respiration
oxygen
where dose the electron transport train occur
In the mitochondrial membrane (cristae)
what is the final electron acceptor in the electron transport chain
oxygen
Which of the following is an anabolic process related to cellular respiration?
Gluconeogenesis
What happens if oxygen is not available for cellular respiration?
The electron transport chain stops working
What is the first step in breaking down lipids for energy
Beta-oxidation
What is the final ATP yield from cellular respiration per glucose molecule?
32-34 ATP
What must happen before the citric acid cycle can begin?
Pyruvate must be converted to Acetyl-CoA
What is the main inhibitor of phosphofructokinase?
ATP
What is an important control point in glycolysis?
Phosphofructokinase
What is the net ATP gain from fermentation per glucose molecule?
2
Why does fermentation occur in the absence of oxygen?
To allow glycolysis to continue
What is the product of alcoholic fermentation?
Ethanol and CO₂
What are the two main types of fermentation?
Lactic acid and alcoholic
What is the main purpose of fermentation?
To regenerate NAD⁺ so glycolysis can continue
How does chemiosmosis generate ATP?
By using a proton gradient to power ATP synthase
What is the function of ATP synthase?
To produce ATP using a proton gradient
What process produces the most ATP in cellular respiration?
Oxidative phosphorylation
How many times does the citric acid cycle turn per glucose molecule?
2
Which of the following is NOT a product of the citric acid cycle?
Pyruvate