The absorption and action spectrum of photosynthesis show two maximums, one in the blue region and another in the red. What are the reasons for these?

The two pigment systems.

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The absorbance property of chlorophyll molecules

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The other colours cannot be absorbed

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None of these

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Solution

The correct option is B
The absorbance property of chlorophyll molecules

The chlorophyll a and b molecules show maximum absorption at two different wavelengths, one in the blue region and other in the red region of the visible spectrum. Hence, the absorption and action spectrums show two corresponding maximums.

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Similar questions

Q. The red and green lines in the graph shown below indicate the action spectra for chlorophyll pigment molecules during photosynthesis. The black line in the graph below shows the absorption spectrum for green plants.
Which of the following best explains the difference between the action spectra and the absorption spectrum in photosynthetic tissues?

Question 53
In the figure given below, the black line (upper) indicates action spectrum for photosynthesis and the lighter line (lower) indicates the absorption spectrum of chlorophyll-a, answer the following

(a) What does the action spectrum indicate? How can we plot an action spectrum? Explain with an example.

(b) How can we derive an absorption spectrum for any substance?

(c) If chlorophyll-a is responsible for light reaction of photosynthesis, why do the action spectrum and absorption spectrum not overlap?

Q. Which of the following conclusions is not arrived from the study of the absorption spectrum for chlorophyll a and the action spectrum for photosynthesis?

Q. Is there a complete one-to-one overlap between the absorption spectrum of chlorophyll a and the action spectrum of photosynthesis?

Q. Can you say that there is a complete one - to - one overlap between the absorption spectrum of chlorophyll a and the action spectrum of photosynthesis? Justify your answer.

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