Question

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Discovery of Emerson effect has shown the existence of?

1) two distinct photo systems

2) light and dark reaction of photosynthesis

3)photophosphorylation

4)photorespiration ​

Answer 1

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two distinct photo systems

Answer 2

Answer:

Two distinct photosystems.

Explanation:

What is Emerson's enhancement effect?

• Emerson explained the rate of photosynthesis based on quantum yield.
• Quantum yield is the amount of O₂ absorbed per quanta light absorbed.
• Emerson used monochromatic light during his experiment. While going from lower to higher wavelengths he observed a sharp drop when the light of wavelength greater than 680 nm was used. This phenomenon is termed the red drop effect ( as the yield dropped immediately after 680 nm - red light)
• On further experimentation, he observed that when the light of lower and higher ( than 680 nm) wavelengths was used simultaneously the quanta obtained was much higher than the quanta of their results added.

Example:

Higher(than 680 nm) and lower wavelengths were observed separately.

670 nm = 42 quanta

700 nm = 10 quanta

Higher and lower wavelengths were observed simultaneously.

670 nm+700 nm = 82 quanta

Note:

• The addition sign above doesn't denote the addition of the individual quanta obtained.
• This example was only given to explain the above statement.

You may refer the attachment for better understanding.

From this we can conclude that Emerson's effect includes two photo systems.