Tossup
A protein serving as a transfer agent into one of these complexes was the first “blue copper” protein to have its antiparallel beta barrel structure characterized. Proteins like R-PE and B-PE create rods of stacked cylindrical subunits in one of these complexes called phycobilisomes. A subunit of one of these complexes goes through five states labeled S-sub-0 to S-sub-4 in a cycle named for Bessel Kok. Three clusters in one of these complexes labelled Fx, Fa, and Fb facilitate electron transfer to ferredoxin. Cytochrome b6f, plastoquinone, and plastocyanin shuttle electrons between two of these complexes, one of which contains the oxygen-evolving complex. For 10 points, name these protein complexes inside thylakoid membranes involved in the light-dependent reactions of photosynthesis, which are labeled I and II. ■END■
ANSWER: photosystems [accept photosystem I or photosystem II or PS I or PS II; accept P680 or P700; accept plastocyanin-ferredoxin oxidoreductase or water-plastoquinone oxidoreductase; prompt on thylakoids or thylakoid membranes until read; prompt on chloroplasts; prompt on oxygen-evolving complex until read by asking “what structure is that located within?”]
<MS, Biology>
= Average correct buzz position
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