Photosynthesis Flashcards

1
Q

What absorbs light energy

A

Antenna pigments

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2
Q

How are electrons released in PS2

A

Photolysis

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3
Q

Where are electrons excited to

A

Phaeophytin

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4
Q

What is the phaeophytin

A

Primary electron acceptor

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5
Q

What’s the order the electrons are passed along from PS2 to PS1

A

Phaeophytin
Plastoquinone
Cytochrome complex
Plastocyanin

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6
Q

What are protons actively transported down

A

Plastoquinone

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7
Q

Which direction are protons actively transported

A

Stroma to thylakoid space

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8
Q

What catalyses the formation of NADPH

A

NADP Reductase

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9
Q

How many molecules of ATP to NADPH

A

2 ATP

3 NADPH

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10
Q

Where do the protons from photolysis go

A

To the lumen

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11
Q

What replaces the lost electrons from P700

A

Electrons from plastocyanin

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12
Q

What happens if there isn’t enough ATP compared to NADPH

A

electrons are diverted away from making NADPH back to plastoquinones in PS2

More protons are pumped into the lumen from photolysis

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13
Q

How are electrons returned to PS1

A

PS2 is done in reverse

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14
Q

Where is plastocyanin

A

PS1

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15
Q

Where is plastoquinone

A

PS2

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16
Q

What does rubisco stand for

A

Ribulose biphosphate carboxylase

17
Q

How many reaction a second does rubisco process

A

3

18
Q

What is half the protein in a leaf

A

Rubisco

19
Q

What is the main product of the Calvin cycle

A

Glyceraldehyde 3 phosphate

20
Q

Where is sucrose made in plants

A

Cytosol of palisade leaf cells

21
Q

What is sucrose used for and why

A

Transportation around plants as it is soluble

22
Q

Where is starch made

A

Stroma of chloroplast

23
Q

What happens to starch

A

Metabolised at night to provide energy