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.

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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

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Which regions of the visible spectrum are responsible for most of the photosynthesis?
a. blue and yellow
b. blue and red
c. blue and green
d. green and red

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How statements are correct?
i. chlorophyll-a , xanthophylls and carotenoids are called as accessory pigments.
ii. accessory pigments protect chlorophyll-a from photo-oxidation.
iii. chlorophylla are the major pigments responsible for trapping of light
iv. chl-a and chl-b forms the reaction centre
v. chl-a transfers the energy to accessory pigments.
a. 2
b. 3
c. 4
d. 5

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Photochemical phase does not include-
a. water splitting
b. oxygen release
c. CO2 assimilation
d. light absorption

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Which of the following statement is incorrect?
a. Reaction centre is formed by a group of chl- a molecules.
b. Reaction centre is different in both the photosystems.
c. In PS I the reaction centre chlorophyll a has an absorption peak at 700 nm.
d. In PS II the reaction centre chlorophyll a has absorption maxima at 680 nm.

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In photosystem-I, P700 refers to-
a. chl-b
b. chl-a
c. number of pigment molecules
d. absorption peak of chl-a at 700nm.

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Light harvesting complexes are made up of-
a. proteins
b. pigments
c. protein and pigments
d. proteins and lipids.

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In chloroplast the movement of electrons from PS-II to electron transport system is-
a. uphill in terms of redox potential scale.
b. downhill in terms of redox potential scale.
c. from one cytochrome to another
d. None of the above.

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Electrons in the reaction center of PS-I are excited by-
a. blue light
b. red light
c. green light
d. blue and red light.

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