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NEET 2005
Exam
NEET
Year
2005
Subject
Botany
Chapter
Photosynthesis in Higher Plants

NEET 2005 · Botany · Photosynthesis in Higher Plants

As compared to a C_3 -plant, how many additional molecules of ATP...

As compared to a C3\mathrm{C}_3-plant, how many additional molecules of ATP are needed for net production of one molecule of hexose sugar by C4\mathrm{C}_4-plants?

Options

  1. Atwo
  2. Bsix⁡\operatorname{six}
  3. Ctwelve
  4. Dzero.

Correct answer

C. twelve

Step-by-step solution

18 ATP molecules are required by C3\mathrm{C}_3 plants for the synthesis of one molecule of hexose sugar while 30 ATP molecules are needed by the C4\mathrm{C}_4 plants for the same. Thus, C4\mathrm{C}_4 plants have a need of 12 ATP molecules extra than C3\mathrm{C}_3 plants for the synthesis of one molecule of hexose sugar.
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