Questions about photosystems and electron transport chains (A) Wha s one similar

Question

Questions about photosystems and electron transport chains (A) Wha s one similarity between Photosystem II (of plants and (B) What is one similarity between Photosystem II and the green sulfur C) Wha is one similarity between Photosystem I (of plants and cyanobacteria) and the purple bacterial (P870) photosystem? bacterial (P840) photosystem? cyanobacteria) and the green sulfur bacterial (P840) photosystem? What are three "quinone" type electron carriers used in electron transport chains (e,g. in any photosystem or in the mitochondrial electron transport chain)? What metal ion(s) does Photosystem II use to catalyze the oxidation of water to oxygen? Name the element used (D) (E) F) What metal ions(s) that are used by Complex IV in the mitochondrial electron transport chain to reduce oxygen to water? Name the element used

Explanation / Answer

A.

The electron donor in purple bacteria is bacteriochlorophyll a and electron acceptor is bacteriopheophytin a , QA, and QB. The electron donor in cynobacteria PS II is also chlorophyll a and electron acceptor is pheophytin a , QA, and QB.

B.

The electron acceptor in PSII is pheophytin a and in green sulfur bacteria as well electron acceptor in PSII bacteriopheophytin a.

C.

The electron acceptor in PSI is FeS-protein and in green sulfur bacteria as well electron acceptor in PSII FeS-protein.

D.

QA, QB and PQ (plastoquinone).

E.

Mn.

F.

Cu present in cytochrome.

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