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BOT 201 > Photosynthesis (Exam 2) > Flashcards

Photosynthesis (Exam 2) Flashcards

1
Q

photosystems =

A

reaction centers

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2
Q

photosystems have

A

light harvesting complexes (proteins + pigments)

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3
Q

trap chlorophylls in photosystems

A

p680 (ps2) & p700 (ps1)

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4
Q

shape of p680 & p700

A

dimers

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5
Q

p680 & p700 have what pigment

A

chl a

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6
Q

(in p680 & p700) the numbers mean

A

’s of peak absorption

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7
Q

photosystems occur in

A

thylakoid membrane (inner membrane space)

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8
Q

electron donor in ps2

via

A

H2O

via H2O splitting complex

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9
Q

are photosystems light dependent or independent?

A

light dependent

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10
Q

electrons pass from (p680 in) ps2 to –>

A

plastoquinone (PQ)

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11
Q

plastoquinone (PQ) is an

A

electron acceptor

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12
Q

plastoquinone (PQ) can. accept

A

2 e- @ a time

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13
Q

plastoquinone (PQ) takes electrons to –>

A

cytochrome complex b6f

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14
Q

after cytochrome complex 66f, electrons go to –>

A

plastocyanin (PC)

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15
Q

cytochrome complex 66f creates

A

a proton H+ gradient (drives protons into intermembrane space)

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16
Q

plastocyanin (PC) is an

A

electron acceptor

17
Q

electrons pass from plastocyanin (PC) to –>

A

p700 in ps1

18
Q

electrons pass from ps1 to –>

A

Ferrodoxin (FD)

19
Q

electrons pass from Ferrodoxin (FD) to –>

A

NADP+ reductase

20
Q

NADP+ reductase makes

A

NADPH

21
Q

how does cytochrome complex 66f create a proton gradient?

A

energy lost between p680 & p700 is used to move H+ protons from the stroma to the innermembrane space

22
Q

the movement of electrons in photosynthesis is

A

noncyclic

23
Q

NADPH then goes to

A

the Calvin cycle

24
Q

H+ protons form the inner membrane go to –>

A

to ATP Synthase & back out (to go through cytochrome complex again)

25
Q

water donates

& byproduct

A

electrons & 2 protons

byproduct = oxygen

26
Q

For every H2O split =

A

1 NADP+ made

BOT 201 (26 decks)

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