
What does the action spectrum indicate?
Important Questions on Molecular Biology


The graph below represents the absorption spectrum of a major pigment contributing to photosynthesis.
Which one of the following best represents the photosynthetic efficiency of the pigment?

In the figure given below, the black line (upper) indicates the action spectrum for photosynthesis and the lighter line (lower) indicates the absorption spectrum of chlorophyll a, answer the following:
What does the action spectrum indicate? How can we plot an action spectrum? Explain with an example.

Why does chlorophyll appear green in reflected light and red transmitted light? Explain the significance of these phenomena in terms of photosynthesis.





Represent the union of two sets by Venn diagram for each of the following.
is a prime number between and
is an odd number between and

Match the following and choose the correct combination from the given options.
Column-I | Column- II |
---|---|
(A) Visible light | (1) 0.1 to 1 nm |
(B) Ultra violet | (2) 400 to 700 nm |
(C) X-rays | (3) Longer than 740 nm |
(D) Infra-red | (4) 100 to 400 nm |
(5) < 0.1 nm |

Consider the above-given figure and select the option that can be best concluded from it.



In the figure given below, the black line (upper) indicates the action spectrum for photosynthesis and the lighter line (lower) indicates the absorption spectrum of chlorophyll a, answer the following:
How can we derive an absorption spectrum for any substance?

The diagram below shows three plants with identical leaf surface areas
(x) (y) (z)
Assuming all other conditions were identical for all three plants, which of the plants would likely to photosynthesize slowest, and which fastest





