- an electron is excited by light and passed to the primary electron acceptor, which passes it down an electron transport chain and leads to the synthesis of ATP - an electron in chlorophyll a is excited and passed to the primary electron acceptor. The electron is passed down a chain of proteins from the primary electron acceptor. As the electron is passed, it loses energy. The energy lost from the electron is used to pump protons (H+) into the lumen of the thylakoid. The proton gradient created is used to fuel the production of ATP via the enzyme complex ATP synthase. - The final acceptor of the electron from photosystem 2 is the chlorophyll a that lost its electron in photosystem 1. - As electrons are lost from photosystem 2, electrons from the splitting of water replace them. Water is split into two hydrogen ions and an oxygen atom. The oxygen atom combines with another oxygen to form O2 .

- has lost an electron to make NADPH, it receives an electron from the electron transport chain of photosystem 2.

- or the splitting of water, takes place in order to provide electrons to photosystem 2 (since chlorophyll a from photosystem 2 loses excited electrons).

- The end products of the light reactions (the reactions of photosystem 1 and photosystem 2) are ATP, NADPH + H+, and O2

Which of the following does not take place during cyclic photophosphorylation?

- Water provides electrons to photosystem I.

A major difference between cyclic and noncyclic photophosphorylation is

- cyclic photophosphorylation produces no NADPH

Which of the following takes place as a result of photosynthetic electron transport?

- A proton gradient is established across the thylakoid membrane

How is photosystem II linked to photosystem I?

- An electron from photosystem II is passed to photosystem I

5.3.3 Photosystem 2 Flashcards by Irina Soloshenko

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5.3.3 Photosystem 2 Flashcards

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