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Emerson’s enhancement effect and Red drop have been instrumental in the discovery of:

  1. A
    Two photosystems operating simultaneously
  2. B
    Photophosphorylation and cyclic electron transport
  3. C
    Oxidative phosphorylation
  4. D
    Photophosphorylation and non – cyclic electron transport

Solution & Step-by-step Explanation

Robert Emerson observed that the rate of photosynthesis decreased sharply at wavelengths longer than (Red drop). However, when shorter wavelength light was added, the rate increased significantly (Enhancement effect). This provided evidence for the existence of two photosystems (PS I and PS II).

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Emerson’s enhancement effect and Red drop have been instrumental in the discovery of:
A
Two photosystems operating simultaneously
B
Photophosphorylation and cyclic electron transport
C
Oxidative phosphorylation
D
Photophosphorylation and non – cyclic electron transport

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