Which of the following cannot be concluded from experiments of Emerson and Arnold?

Moderate

A

Two types of photosystems PS-I and PS-II exist in photosynthetic units
B

When PSI and PSII work simultaneously then rate of photosynthesis is higher
C

PS-I requires wavelength of 700 nm and PS-II requires 680 nm for their function.
D

When PS I and PS II work simultaneously then rate of photosynthesis is lower.

Solution

When beams of wavelengths 700 nm and 680 nm were supplied to the plant simultaneously, both PS I and PS II worked synergistically and enhanced photosynthetic yield.

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