Question:

In which of the following wavelength, photosystem-$I$ is inactive?

Updated On: Jun 17, 2022

780 nm
680 nm
690 nm
550 nm

Hide Solution

Verified By Collegedunia

The Correct Option is A

Solution and Explanation

In $780\, nm$ of wavelength photosystem-I is reactive. In photosystem-I, the photocentre is special chlorophyll-a molecule called $P_{700}$. PS-I has a reducing agent $X,\, Fe-S$ centre, plastoquinone, cytochrome complex and piastocyanin. Part of the spectrum used in photosynthesis has a wavelength between $400-700\, nm$. In photosystem-II a very small amount of special form of chlorophyll-a, called $P_{680}$ is present.

Was this answer helpful?

Questions Asked in NEET exam

View More Questions

Concepts Used:

Photosynthesis in Higher Plants

Processes Of Photosynthesis in Higher Plants:

Photosynthesis in higher plants involves the following processes:

Light Reaction
Dark Reaction

Light Reaction:

This phenomenon occurs in the presence of light.
The pigment absorbs light and produces energy in the form of ATP.
The process involves- absorption of light, water splitting, the release of oxygen, and formation of ATP and NADPH.

Dark Reaction:

This process occurs in the absence of light in the stroma of the chloroplasts. The following cycles are involved in the process:

Calvin Cycle (C3 Cycle)
C4 Cycle (Hatch and Slack Pathway)

List-I (Pigments)		List-II (Colour in chromatogram)
1	Chlorophyll 'b'	p	Yellow orange
2	Carotenoids	q	Orange red
3	Chlorophyll 'a'	r	Yellow
4	Xanthophylls	s	Blue green
		t	Yellow green