The process of photosynthesis is most active in the___________ regions of the spectrum.

Correct option is C

The correct answer is (c) red and blue.
The process of photosynthesis is most active in the red and blue regions of the light spectrum. During photosynthesis, chlorophyll, the primary pigment in plants, absorbs light energy primarily from the red (approximately 600-700 nm) and blue (approximately 400-500 nm) wavelengths. These wavelengths provide the optimal energy needed for converting carbon dioxide and water into glucose and oxygen. The green region of the spectrum is least effective for photosynthesis as chlorophyll reflects green light, which is why plants appear green.
Information Booster:
● Chlorophyll absorbs maximum light in the blue and red regions, driving the energy for photosynthesis. ● The red light is primarily absorbed by chlorophyll-a, while blue light is absorbed by chlorophyll-b. ● Photosynthesis is less efficient in the green spectrum, as green light is reflected by chlorophyll. ● Blue light promotes vegetative growth, while red light supports flowering and fruiting in plants. ● Accessory pigments like carotenoids also assist in absorbing additional light from the blue region. ● Photosynthesis is vital for producing oxygen and supporting life by generating energy in the form of glucose.
Additional Knowledge:
· (a) violet and blue: While blue light is absorbed and used in photosynthesis, violet light is not as efficient as red for this process.
· (b) green and red: Green light is mostly reflected by plants and is thus ineffective for photosynthesis, while red is highly effective.
· (c) red and blue: This is the correct answer, as both red and blue regions of the spectrum are actively utilized in photosynthesis.
· (d) blue and green: Blue is absorbed, but green is mostly reflected, making this combination less effective for photosynthesis.