Pigments Involved in Photosynthesis

What is PAR range?

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.

The reaction centre of PS-II is_____.

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

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

Chlorophyll $\text{'}\mathrm{a}\text{'}$ and $\text{'}\mathrm{b}\text{'}$ show maximum absorption in

Match the following column I with column II

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
 

Why is chlorophyll-a called essential pigment? 

Which pigment is absent in chloroplast?

Chlorophyll-b has the empirical formula

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

Which of the following wavelength occurs in the red part of the spectrum?

The most effective wavelength of visible light in photosynthesis is

The red, orange and yellow colour of leaves are caused by light reflected from

The three types of photosynthetic pigments in higher plants are

Assertion (A) : Chlorophyll - a is the reaction centre in the granum.

Reason (R) : Chlorophyll - a is capable of converting solar energy into chemical energy.

Chlorophyll is present

__________ protect the essential pigment chlorophyll-a, from photo-oxidation.

__________ light is mostly reflected by plants.

PAR stands for