Q61
Kranz anatomy is typical of
Correct Answer
Option A
Solution
(a) Kranz anatomy is the hallmark of C4 plant leaf structure.
Photosynthesis in Higher Plants
Q62
Which technique helped in investigation of Calvin cycle?
Correct Answer
Option C
Solution
(c) Calvin used 14C-radiolabelled CO2 (radioactive isotope technique) to trace the Calvin cycle.
Q63
The first carbon dioxide acceptor in C4 plants is
Correct Answer
Option A
Solution
(a) PEP (phosphoenolpyruvate) is the primary CO2 acceptor in C4 mesophyll cells.
Q64
Which one is a C4 plant?
Correct Answer
Option D
Solution
(d) Maize (Zea mays) is a classic C4 plant.
Q65
Series of reactions which can convert fatty acids to sugars in plants but not in animals is
Correct Answer
Option B
Solution
(b) Glyoxylate cycle operates in plant seeds to convert fats to sugars.
Q66
C4 cycle was discovered by
Correct Answer
Option A
Solution
(a) Hatch and Slack discovered the C4 cycle in 1966.
Q67
The specific characteristic of C4 plants is
Correct Answer
Option C
Solution
(c) Kranz anatomy (wreath arrangement of bundle sheath cells) is characteristic of C4 plants.
Q68
Photorespiration is favoured by
Correct Answer
Option A
Solution
(a) Photorespiration occurs when RuBisCO acts as oxygenase under high O2 and low CO2.
Q69
Which enzyme is most abundantly found on earth?
Correct Answer
Option B
Solution
(b) RuBisCO is the most abundant enzyme on Earth.
Q70
Fixation of one CO2 molecule through Calvin cycle requires
Correct Answer
Option C
Solution
(c) Per CO2 fixed: 3 ATP + 2 NADPH consumed.
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