Multiple choice

Which statement is not true about photosystems?

  1. Photosystem I passes electron on to photosystem II.

  2. Each photosystem contains numerous pigment molecules that act as antennas to capture light.

  3. Photosystem I contains a reaction center molecule that absorbs light best around 700 nm, so it is called P700.

  4. Electrons in the reaction center molecule are excited by absorbing photons of light and are passed along to an acceptor molecule.
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A Correct answer
Explanation

In the noncyclic pathway, electrons flow from Photosystem II to Photosystem I, not the other way around. Photosystem II is the first in the chain.

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