How many pigments are responsible for the color of a plant leaf?
After performing the chromatographic separation of a plant leaf, experimentor found bright or blue green colour in the chromatogram. Then this pigment should be-
c. chlorophyll a
d. chlorophyll b.
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.
Which of the following is the chief pigment associated with photosynthesis?
c. chl- a and xanthophylls
d. chl-a and carotenoids
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.
Photochemical phase does not include-
a. water splitting
b. oxygen release
c. CO2 assimilation
d. light absorption
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.
In photosystem-I, P700 refers to-
c. number of pigment molecules
d. absorption peak of chl-a at 700nm.
Light harvesting complexes are made up of-
c. protein and pigments
d. proteins and lipids.
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.