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: Â Pigments |
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Subtopic: Â Pigments |
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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: Â Pigments |
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Range of wavelength at which chlorophyll-a shows the maximum absorption:
a. 400-450 nm
b. 450-500 nm
c. 650-700 nm
d. 500-600 nm.
Subtopic: Â Pigments |
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Which of the following is the chief pigment associated with photosynthesis?
a. chl-a
b. chl-b
c. chl- a and xanthophylls
d. chl-a and carotenoids
Subtopic: Â Pigments |
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Water-soluble pigments found in plant cell vacuoles are:
| 1. | chlorophylls | 2. | carotenoids |
| 3. | anthocyanins | 4. | xanthophylls |
Subtopic: Â Pigments |
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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: Â Pigments |
From NCERT
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The accessory pigments of photosynthesis:
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
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 |
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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 |
Codes
| 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 |
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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. Both (A) and (R) are false.
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. Both (A) and (R) are false.
Subtopic: Â Pigments |
 67%
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