Pigments Involved in Photosynthesis

Why is chlorophyll-a called essential pigment? 

Which pigment is absent in chloroplast?

Write a note on photosynthetic pigments.

Give a brief description of chemical structure of chloroplast.

Note: There is an ambiguity in the question, hence, rectified as below.

Give a brief description of the chemical structure of chlorophyll.

Which are the pigments that take part in photosynthesis?

Which are the accessory pigments in photosynthesis?

What is the difference between chlorophyll-a and chlorophyll-b? 

Which metal found in the centre of the chlorophyll molecule?

Carotenoids are composed of carotene and xanthophyll.

In the figure given below, the black line (upper) indicates action spectrum for photosynthesis and the lighter line (lower) indicates the absorption spectrum of chlorophyll a, answer the followings:

If chlorophyll a is responsible for light reaction of photosynthesis, why do the action spectrum and absorption spectrum not overlap?

Write the ratio of chlorophyll-a to chlorophyll-b in green plants is 3:1 or 5:1.

Which is the universal green pigment found in green plants, whether it is Chlorophyll b or Chlorophyll a?

Out of the total incident solar radiation the proportion of PAR is

Which of the following prevents the photo-oxidation and destruction of pigments

Which one of the following pigment functions as a reaction center in photosynthesis?

In blue-green algae, photosystem-II contains important pigment concerned with photolysis of water. It is 

Which one of the following is not a accessory pigment

The role of carotenoids in photosynthesis is to

The approximate dimension of chlorophyll porphyrin ring is

The core metal of chlorophyll is