Assertion (A): Chromatographic separation of leaf pigments shows that leaves has four different pigments.
Reason (R): Pigments absorb light at specific wavelengths and help in the process of photosynthesis. The major leaf pigments are chlorophyll-a, chlorophyll-b, xanthophylls and carotenoids.
The correct option among the following is:
Important Questions on Photosynthesis in Higher Plants
A) Chlorophyll is the major pigment responsible for the trapping of light, accessory pigments also participate
B) In green plants, H2O is the hydrogen donor
C) In purple sulfur bacteria the oxidation product is carbon
D) Radioisotope studies proved water as a source of O2 release in photosynthesis.
Which of the following are required for chemiosmosis?
I. A membrane
I. A neutron pump
II. An electron gradient
IV.
The correct answer is:
Arrange the path of electrons from water to the phycocyanin in the light reaction.
i) Plastoquinone
ii) Excited
iii) Cyt
iv)
v) Pheophytin
vi) Quinone
The correct sequence is
Assertion (A): Electrons released from the photosystem are used by the electron transport chain during photophosphorylation.
Reason (R): Movement of electrons from pheophytin to the PS-I reaction centre is an oxidation-reduction reaction.
The correct option among the following is:
A) In ATPase enzyme part is embedded in the membrane and forms a transmembrane channel
B) The part of ATPase protrudes on the outer side of the membrane and a proton gradient is formed across the membrane
C) The gradient of the proton provides enough energy to cause a conformational change in particle
D) The change in particle makes the enzyme synthesize ATP
(A) Photorespiration is the synthesis of neither sugar nor ATP rather the release of .
(B) CAM metabolism is an alternative to and pathways of fixation in plants in dry and hot climates.
(C) Bundle sheath cells are having many chloroplasts, thick walls with no intercellular space.
(D) After World War II photosynthetic studies were exemplary.
Reason (R): has a much greater affinity for CO2 than for O2.
The correct option among the following is:
