HORTICULTURE

HORTICULTURE SCIENCE

PLANT BIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Chlorophyll absorbs ____ and ____ light from the light.
A
purple and green
B
red and blue
C
black and orange
D
yellow and green
Explanation: 

Detailed explanation-1: -Chlorophyll absorbs all colors present in VIBGYOR except the green color. The highest absorption occurs in violet-blue and red regions of visible light. Pigment chlorophyll is present in the chloroplast of the cells.

Detailed explanation-2: -Chlorophyll a is the most abundant pigment in plants. Chlorophyll a absorbs light mostly 430nm (blue) and 662nm (red) wavelength light. It reflects green light so it appears green to us.

Detailed explanation-3: -Red and blue light is believed to have a higher quantum yield of CO2 assimilation. The blue and red parts of the spectrum are effective to satisfy the energy requirement of plants. Hence plants absorb these two colors more than any other color.

Detailed explanation-4: -Chlorophyll a absorbs light in the blue-violet region, chlorophyll b absorbs red-blue light, and both a and b reflect green light (which is why chlorophyll appears green).

Detailed explanation-5: -Chlorophyll absorbs light most strongly in the blue portion of the electromagnetic spectrum, followed by the red portion. Conversely, it is a poor absorber of green and near-green portions of the spectrum, hence the green color of chlorophyll-containing tissues. 9.

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