| 1. | In plant cells, which of the following is not a function of the large central vacuoles of plant cells? |
| a. | Storage of food |
| b. | Support |
| c. | Contractile regulation of |
| d. | Waste storage water content |
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Answer: (c).Contractile regulation of
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| 2. | Which of the following can be found as a part of the mitochondrial matrix? |
| a. | Ribosomes |
| b. | DNA |
| c. | Enzymes |
| d. | All of these |
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Answer: (d).All of these
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| 3. | 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 |
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Answer: (b).steady-state metabolism
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| 4. | 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 |
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Answer: (b).Addition of dinitrophenol to isolated mitochondria was shown to inhibit electron transport, but had no effect on ATP synthesis
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| 5. | Both plant and animal cell possess |
| a. | cell walls |
| b. | mitochondria |
| c. | central vacuoles |
| d. | chloroplast |
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Answer: (b).mitochondria
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