light dependant reaction Flashcards

(19 cards)

1
Q

Where does this take place?

A

In the grana of chloroplasts

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2
Q

What are the products?

A

ATP, reduced NADP, oxygen

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3
Q

What is the first stage to the flow of electrons in this reaction?

A

Light energy is absorbed by the chlorophyll

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4
Q

What does this result in?

A

Photoionisation which releases electrons and chlorophyll becomes positively charged

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5
Q

What is the second stage?

A

Electrons are raised to a higher energy level

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6
Q

What is the third stage?

A

Water is split through photolysis which releases electrons, protons and oxygen

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7
Q

What is the fourth stage?

A

The electrons replace those lost by chlorophyll in photoionisation

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8
Q

What is the next stage?

A

The electrons are passed down an electron transport chain on the thylakoid membrane

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9
Q

What happens during each transfer?

A

Energy is released

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10
Q

What is the next stage?

A

The electrons are transferred to the second chlorophyll

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11
Q

What is the next stage?

A

Light energy is absorbed by that chlorophyll causing photoionisation

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12
Q

What is the next stage?

A

The electrons are accepted by NADP

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13
Q

What does NADP also accept?

A

The protons from the photolysis of water

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14
Q

What does the NADP become?

A

Reduced

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15
Q

What is the first stage in the production of ATP in this reaction?

A

As the electrons move down the electron transport chain, energy is released

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16
Q

What is the second stage?

A

This energy is used to pump protons from the stroma into the thylakoid

17
Q

What is established?

A

A proton gradient

18
Q

What is the next stage?

A

The protons diffuse down their concentration gradient into the stroma via the enzyme ATP synthase

19
Q

What is the energy transferred from the movement of protons used in?

A

To phosphorylate ADP to form ATP