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

Options

A. two photosyntems operating simultaneously
B. photophosphorylation ad cyclic electron transport
C. oxidative phosphorylation
D. photophoshorylation and non-cyclic electron transport

Answer

A

Explanation

Emerson perfomred photosynthetic experiment on Chlorella. He provided monochromatic light of more than 680 nm and observed decrease in rate of photosynthesis known as red drop. Later, he provided synchronised light of 680 nm and 700 nm ad observed increase in rate of photosynthesis, known as enchancement effect. This experiment led to discovery of two photosynstems-PS-I and PS-II operating in photosynthesis.