- 1(current)
Q. No.The diagram shows the famous Engelmann experiment that helped us understand important aspects of the process of photosynthesis. What conclusion can be drawn by the pattern of accumulation of aerobic bacteria shown in the diagram?
| 1. | Excess carbon dioxide is released by the alga in the area of accumulation. |
| 2. | Only red and violet lights are effective for photosynthesis. |
| 3. | In the areas of accumulation, most oxygen was liberated by the alga. |
| 4. | Bacteria are attracted to red and blue light. |
Subtopic: Â Pigments |
 56%
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It can be correctly said about the relation between the absorption spectra of various pigments and the action spectrum of photosynthesis that:
| 1. | There is a complete one to one overlap between the absorption spectrum of chlorophyll a and the action spectrum of photosynthesis. |
| 2. | There is a complete one to one overlap between the absorption spectrum of chlorophyll b and the action spectrum of photosynthesis. |
| 3. | The absorption spectrum of chlorophyll a is wider than the action spectrum of photosynthesis. |
| 4. | The absorption spectrum of chlorophyll a is narrower than the action spectrum of photosynthesis. |
Subtopic: Â Pigments |
From NCERT
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The absorption spectrum in the given diagram will be of:
| 1. | Chlorophyll a | 2. | Chlorophyll b |
| 3. | Carotenoids | 4. | Retinol |
Subtopic: Â Pigments |
 92%
From NCERT
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The wavelengths of light most useful in photosynthesis are:
| 1. | green and orange | 2. | red and blue |
| 3. | infrared and yellow | 4. | red and green |
Subtopic: Â Pigments |
 94%
From NCERT
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Hints
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Match each item in Column I with one in Column II and select the correct match from the codes given:
Codes
| Column I | Column II | ||
| A. | Chlorophyll a | P. | Bright or blue-green |
| B. | Chlorophyll b | Q. | Yellow-green |
| C. | Xanthophylls | R. | Yellow |
| D. | Carotenoids | S. | Yellow to yellow-orange |
| A | B | C | D | |
| 1. | P | Q | R | S |
| 2. | Q | R | S | P |
| 3. | R | S | P | Q |
| 4. | S | P | Q | R |
Subtopic: Â Pigments |
 93%
From NCERT
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The accessory pigments of photosynthesis:
1. Only I and II are correct
2. Only I and III are correct
3. I, II and III are correct
4. Only II and III are correct
| I: | include Carotenoids and Xanthophylls but not Chlorophyll b. |
| II: | enable a wider range of wavelength of incoming light to be utilised for photosynthesis. |
| III: | protect Chlorophyll a from photo-oxidation. |
1. Only I and II are correct
2. Only I and III are correct
3. I, II and III are correct
4. Only II and III are correct
Subtopic: Â Pigments |
 88%
From NCERT
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Hints
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- 1(current)
Q. No.
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