Question

Properties of photochrome

Answer 1

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properties are given in pic

Answer 2

The action spectrum of the light needed for these responses shows a peak in the red at about 660 nm.These responses can be reversed by an application of far-red light (peak at 730 nm) soon after the red treatment.Sensitive spectrophotometers can measure a decrease in absorbance at 660 nm and in increase in absorbance at 730 nm when sensitive plant tissues are exposed to red (660 nm) light.

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