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| 1 | |
The energy that is used by almost all living things on our planet comes from the sun. It is captured by plants, algae, and some bacteria through the process of |
| | A) | thylakoid. |
| | B) | chloroplasts. |
| | C) | photosynthesis. |
| | D) | the Calvin cycle. |
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| 2 | |
Plants capture sunlight |
| | A) | with netlike structures in their leaves that catch and hold photons. |
| | B) | with molecules called pigments that absorb photons and use their energy. |
| | C) | with sticky molecules that absorb photons and transfer their energy. |
| | D) | by angling their leaves slightly to the sun's rays for more absorbance of photons. |
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| 3 | |
Visible light occupies what part of the electromagnetic spectrum? |
| | A) | the entire spectrum |
| | B) | the upper half of the spectrum (with longer wavelengths) |
| | C) | a small portion in the middle of the spectrum |
| | D) | the lower half of the spectrum (with shorter wavelengths) |
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| 4 | |
The colors of light that are most effective for photosynthesis are |
| | A) | red, blue, and orange. |
| | B) | green, yellow, and orange. |
| | C) | infrared and ultraviolet. |
| | D) | All colors are equally effective. |
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| 5 | |
Once a plant has initially captured the energy of a photon |
| | A) | a series of reactions occurs in chloroplast membranes of the cell. |
| | B) | the energy is transferred through several steps into a molecule of ATP. |
| | C) | several pigments, including two kinds of chlorophyll, may be involved. |
| | D) | all of the above are true. |
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| 6 | |
Plants use two photosystems to capture energy used to produce ATP and NADPH. The electrons used in these photosystems |
| | A) | recycle through the system constantly, with energy added from the photons. |
| | B) | recycle through the system several times, using energy added from photons, and then are lost due to entropy. |
| | C) | only go through the system once; they are obtained by splitting a water molecule. |
| | D) | only go through the system once; they are obtained from the photon. |
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| 7 | |
During photosynthesis, ATP molecules are generated by |
| | A) | the Calvin cycle. |
| | B) | chemiosmosis. |
| | C) | the splitting of a water molecule. |
| | D) | photons of light being absorbed by chlorophyll molecules. |
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| 8 | |
NADPH is recycled during photosynthesis. It is produced during the ________ and used in the_________. |
| | A) | electron transport system of photosystem II, Calvin cycle |
| | B) | process of chemiosmosis, Calvin cycle |
| | C) | electron transport system of photosystem II, electron transport system of photosystem I |
| | D) | light-independent reactions, light-dependent reactions |
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| 9 | |
The overall purpose of the Calvin cycle is to |
| | A) | generate molecules of ATP. |
| | B) | generate NADPH. |
| | C) | build sugar molecules. |
| | D) | give off oxygen. |
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| 10 | |
Many plants cannot carry out the typical C3 photosynthesis in hot weather, so some plants |
| | A) | use the ATP cycle and the ATP cycle is not a type of photosynthesis. |
| | B) | use C4 photosynthesis or CAM. |
| | C) | wait until evening to begin photosynthesis. |
| | D) | All of these are true for different plants. |
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