Pigments Involved in Photosynthesis

IMPORTANT

Pigments Involved in Photosynthesis: Overview

This Topic covers sub-topics such as Carotenoids, Carotenes, Photosynthetic Pigments, Xanthophylls, Phycobilins, Chlorophyll Pigment, Accessory Pigments for Photosynthesis and, Effect of Different Wavelength of Light on Photosynthesis

Important Questions on Pigments Involved in Photosynthesis

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Assertion : Cyclic pathway of photosynthesis first appeared in some eubacterial species.

Reason : Oxygen started accumulating in the atmosphere after the non-cyclic pathway of photosynthesis evolved.

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If chlorophyll is burnt, then which of the following is left in ash?

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A pigment which absorbs red and far-red light is

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Three of the graphs below show the absorption spectra of photosynthetic pigments. One graph shows the action spectrum of photosynthesis for a plant containing the pigments.

All the x axis show wavelength. Three of the y axis show light absorption. One y axis shows the rate of photosynthesis

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The role of chlorophyll in photosynthesis is

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Which pigment acts directly to convert light energy to chemical energy?

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Which wavelength of light carries out photosynthesis in bacteria?

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The reaction centre of PS-II is_____.

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The graph below represents the absorption spectrum of a major pigment contributing to photosynthesis.

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Which one of the following best represents the photosynthetic efficiency of the pigment?

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Chlorophyll 'a' and 'b' show maximum absorption in

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Match the following column I with column II

   Column I    Column II 
a)  Chlorophyll-a i.  Yellow-Orange
b) Chlorophyll-b ii. Yellow
c) Xanthophylls iii. Blue Green
d) Carotenoids iv. Yellow Green

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A piece of carrot and a flower is put in water separately. The water becomes coloured in case of carrot but remains colourless in case of flower. It is because
 

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Which pigment is absent in chloroplast?

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Which of the following is true?

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In a molecule of chlorophyll, there is

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Chlorophyll-b has the empirical formula

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There are the two peaks of light absorption of Chlorophyll 'a'. The two peaks are near