Multiple Choice QuestionsRead the following four statements:
I. Both, photophosphorylation and oxidative phosphorylation involve uphill transport of protons across the membrane.
II. In dicot stems, a new cambium originates from cells of pericycle at the time of secondary growth.
III. Stamens in flowers of Gloriosa and Petunia are polyandrous.
IV. Symbiotic nitrogen fixers occurs in free-living state also in soil.
How many of the above statements are right
Two
Three
Four
Four
In Kranz anatomy, the bundle sheath cells have
thin walls, many intercellular spaces and no chloroplasts
thick walls, no intercellular spaces and a large number of chloroplasts
thin walls, no intercellular spaces and several chloroplasts
thin walls, no intercellular spaces and several chloroplasts
Which one of the following is essential for photolysis of water
Manganese
Zinc
Copper
Copper
A.
Manganese
Photolysis of water requires light energy and oxygen evolving complex (OEC) and an electron carrier Yz. OEC complex was formerly called Z - enzyme. It has four Mn ions. Light energy brings about changes in Mn (Mn+2, Mn3+ Mn+4) which helps in removing electrons from OH- component of water forming oxygen.Liberation of oxygen also requires Cl- and Ca2+.
PGA as the first CO2 fixation product was discovered in photosynthesis of
bryophyte
gymnosperm
angiosperm
angiosperm
C4 plants are more efficient in photosynthesis than C3 plants due to
higher leaf area
the presence of a larger number of chloroplasts
the presence of thin cuticle
the presence of thin cuticle
Read the following four statements, A, B,C and D select the right option having both correct statements.
A) Z scheme of light reaction takes place in presence of PS- I only.
B) Only PS-I is functional in cyclic photophosphorylation.
C) Cyclic photophosphorylation results into synthesis of ATP and NADPH2
D) Stroma lamellae lack PS-II as well as NADP.
B and D
A and B
B and C
B and C
Kranz anatomy is one of the characteristics of the leaves of
potato
wheat
sugarcane
sugarcane
Oxygenic photosynthesis occurs in
Chromatium
Oscillatoria
Rhodospirillum
Rhodospirillum
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