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17.3 - Photosynthesis > Non-cyclic phosphorylation > Flashcards

Non-cyclic phosphorylation Flashcards

1
Q

What are the two stages of photosynthesis ?

A

light dependent stage

light independent stage

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2
Q

What is formed in light dependent stage ?

A

energy from sunlight is absorbed to form ATP

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3
Q

In the light dependent stage what is hydrogen from water used for ?

A

reduce NADP to reduced NADP

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4
Q

How is organic molecules such as glucose formed in the light independent stage ?

A

hydrogen from reduced NADP reacts with carbon-dioxide

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5
Q

How many photosystems are involved in non-cyclic photophosporylation ?

A

2

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6
Q

What wavelength of light does PSI absorb ?

A

700 nm

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7
Q

What wavelength of light does PSII absorb ?

A

680 nm

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8
Q

What is released from reaction centre of PSII when light is absorbed ?

A

excited electrons

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9
Q

Where are the excited electrons passed to ?

A

electron transport chain

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10
Q

How is ATP produced ?

A

chemiosmosis

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11
Q

How is the electrons lost from PSII replaced ?

A

water molecules broken down by energy from sun

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12
Q

After PSII , What is released from PSI ?

A

excited electrons

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13
Q

Where is the excited electrons from PSI passed to ?

A

electron transport chain

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14
Q

How is electron lost from PSI replaced ?

A

electrons that travelled from PSII that travelled along electron transport chain

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15
Q

Which electrons are accepted ?

A

electrons leaving electron transport chain from PSI

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16
Q

What is the coenzyme that accept electrons and hydrogen ions ?

A

NADP which becomes reduced NADP

17
Q

What does the reduced NADP provide ?

A

hydrogen or reducing power to form organic molecules

18
Q

What is photolysis ?

A

process where water is split into electrons , H+ and oxygen molecules using energy from the sun

19
Q

What do electrons released from splitting of water molecules replace ?

A

electrons lost from PSII

20
Q

What catalyses the breakdown of water molecules ?

A

oxygen-evolving complex

21
Q

What is released as by product when water is split ?

A

oxygen

22
Q

Where are the protons released to ?

A

lumens of thylakoids

23
Q

What happens when there’s more protons in the lumen of thylakoids ?

A

proton concentration increases

24
Q

How is reduced NADP formed ?

A

H+ and electron from PSI combine with NADP

25
Q

What is the energy released when electrons pass through electron carriers used for ?

A

pump H+ ions ( protons ) into the lumen of thylakoids

26
Q

How does the protons leave the lumen of thylakoids ?

A

facilitated diffusion through hydrophilic channel

17.3 - Photosynthesis (6 decks)

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