- 1(current)
Q. No.Chlorophyll pigments, extracted from the leaves, are separated by:
| 1. | paper chromatography |
| 2. | gel electrophoresis |
| 3. | enzyme-linked immunosorbent assay |
| 4. | evaporation followed by cooling |
Subtopic: Â Photosynthetic Pigments |
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Level 1: 80%+
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The relative effectiveness of different wavelengths of light in photosynthesis is demonstrated by
1. an action spectrum
2. photolysis
3. carbon fixation reactions
4. photoheterotrophs
1. an action spectrum
2. photolysis
3. carbon fixation reactions
4. photoheterotrophs
Subtopic: Â Photosynthetic Pigments |
 96%
Level 1: 80%+
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The action spectrum of photosynthesis is a graphical representation of the effectiveness of different wavelengths of light in driving photosynthesis. Which pigment is primarily responsible for the peaks observed in the red and blue regions of this spectrum?
1. Chlorophyll a
2. Chlorophyll b
3. Carotenoids
4. Phycobilins
1. Chlorophyll a
2. Chlorophyll b
3. Carotenoids
4. Phycobilins
Subtopic: Â Photosynthetic Pigments |
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Level 1: 80%+
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Chromatographic separation of leaf pigments reveals that the visible color of leaves is due to a combination of four distinct pigments. Which of the following correctly pairs each pigment with its observed color in the chromatogram?
| 1. | Chlorophyll a (bright or blue-green), chlorophyll b (yellow-green), xanthophylls (yellow), carotenoids (yellow to yellow-orange) |
| 2. | Chlorophyll a (yellow-green), chlorophyll b (bright or blue-green), xanthophylls (yellow to yellow-orange), carotenoids (yellow) |
| 3. | Chlorophyll a (yellow to yellow-orange), chlorophyll b (yellow), xanthophylls (bright or blue-green), carotenoids (yellow-green) |
| 4. | Chlorophyll a (yellow), chlorophyll b (yellow to yellow-orange), xanthophylls (yellow-green), carotenoids (bright or blue-green) |
Subtopic: Â Photosynthetic Pigments |
 93%
Level 1: 80%+
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What are the main components of a photosystem in photosynthesis?
| 1. | Chlorophyll molecules, reaction centre, and light-harvesting complex |
| 2. | ATP synthase, electron carriers, and NADPH |
| 3. | Carbohydrate molecules, thylakoid lumen, and oxygen |
| 4. | Stroma enzymes, plastids, and ribosomes |
Subtopic: Â Introduction |Â Photosynthetic Pigments |Â Pigments |Â Light Reactions |
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Level 1: 80%+
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In the thylakoid membranes, what is the main role of the antenna pigment molecules?
| 1. | split water and release oxygen to the reaction-center chlorophyll |
| 2. | harvest photons and transfer light energy to the reaction-center chlorophyll |
| 3. | synthesize ATP from ADP and Pi |
| 4. | transfer electrons to ferredoxin and then NADPH |
Subtopic: Â Photosynthetic Pigments |Â Light Reaction: Electron Transport |
 82%
Level 1: 80%+
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Energy is transferred from the light reaction step to the dark reaction step by
1. chlorophyll
2. ADP
3. ATP
4. RuBP
Subtopic: Â Introduction |Â Historical View: Experiments |Â Chloroplast Structure |Â Photosynthetic Pigments |Â Redtrop Experiment |Â Emerson's Enhancement Experiment |Â Photosystems |Â Light Reaction: Electron Transport |Â Light Reaction: Photophosphorylation |Â Dark Reaction: Biosynthetic Phase |
 83%
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