Exercise: Plant Structure

Questions for: Plant Structure

Which of the following experimental results does not support Mitchell's chemiosmosis theory?
A:
Electron transport in isolated mitochondria was shown to result in acidification of the medium
B:
Addition of dinitrophenol to isolated mitochondria was shown to inhibit electron transport, but had no effect on ATP synthesis
C:
Addition of dinitrophenol to isolated mitochondria during electron transport was shown to inhibit acidification of the medium
D:
An artificial proton gradient across the inner mitochondrial membrane drives ATP synthesis in the absence of electron transport
Answer: B
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Cellular metabolism is an example of
A:
equilibrium metabolism
B:
steady-state metabolism
C:
a series of reactions occurring under standard conditions
D:
a series of reactions that defy the second law of thermodynamics
Answer: B
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The cellular organelle associated with photosynthesis is the
A:
golgi complex
B:
mitochondrion
C:
lysosome
D:
chloroplast
Answer: D
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What is the source of free energy (ΔG) for moving protons out of mitochondria against their concentration and electrical gradients?
A:
Glycolysis
B:
Creatine phosphate
C:
The redox reactions of electron transport
D:
ATP
Answer: C
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Which of the following is not an electron carrier class in the electron transport chain?
A:
Flavoproteins
B:
Cytochromes
C:
Iron - sulfur proteins
D:
Cytochrome c oxidase
Answer: D
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