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PS-I is named as it:

Correct answer: B. Discovered earlier than PS-II

  • A. Absorbs wavelength of 680 nm
  • B. Discovered earlier than PS-II
  • C. Absorbs wavelength of 700 nm
  • D. Slightly located upward than PS-II

Explanation

Photosynthetic pigments are organized into clusters, called photosystems. There are two photosystems found in plants, PS-I and PS-II. These are named so in order of their discovery.

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