Compared to retinal, chlorophyll can be described as a pigment that has a
| 1. | narrow absorption range but high efficiency |
| 2. | narrow apsorption range but low efficiency |
| 3. | wide absorption range but high effeciency |
| 4. | wide absorption range but low efficiency |
Subtopic: Pigments |
51%
Level 3: 35%-60%
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Subtopic: Pigments |
78%
Level 2: 60%+
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After performing the chromatographic separation of a plant leaf, experimentor found bright or blue green colour in the chromatogram. Then this pigment should be-
a. xanthophyll
b. carotenoid
c. chlorophyll a
d. chlorophyll b.
Subtopic: Pigments |
85%
Level 1: 80%+
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Range of wavelength at which chlorophyll-a shows the maximum absorption in blue region:
| 1. | 400-450 nm | 2. | 450-500 nm |
| 3. | 650-700 nm | 4. | 500-600 nm. |
Subtopic: Pigments |
Level 3: 35%-60%
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Which of the following is the chief pigment associated with photosynthesis?
1. chl-a
2. chl-b
3. chl- a and xanthophylls
4. chl-a and carotenoids
Subtopic: Pigments |
93%
Level 1: 80%+
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Water-soluble pigments found in plant cell vacuoles are:
| 1. | chlorophylls | 2. | carotenoids |
| 3. | anthocyanins | 4. | xanthophylls |
Subtopic: Pigments |
59%
Level 3: 35%-60%
NEET - 2016
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Accessory pigments of photosynthesis in higher plants:
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
| I: | include chlorophyll b, xanthophylls and carotenoids. |
| II: | absorb light and transfer electrons to chlorophyll a. |
| III: | protect chlorophyll a from photo-oxidation. |
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
Subtopic: Pigments |
Level 4: Below 35%
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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: Pigments |
88%
Level 1: 80%+
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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: Pigments |
93%
Level 1: 80%+
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Consider the given two statements:
| Assertion (A): | Chief photosynthetic pigment is chlorophyll a but plants evolved some other pigments also. |
| Reason (R): | Photosynthetic efficiency is increased due to absorptions of variety of wavelengths. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is Correct. |
Subtopic: Pigments |
68%
Level 2: 60%+
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