Light Stage - Transfer Of Energy To Electrons Flashcards Preview

Biology: 11 - Photosynthesis > Light Stage - Transfer Of Energy To Electrons > Flashcards

Flashcards in Light Stage - Transfer Of Energy To Electrons Deck (16)
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1
Q

How are pigments arranged in the chloroplast?

A

Pigments are arranged in clusters in the chloroplast

2
Q

What are arranged in clusters in the chloroplast?

A

Pigments

3
Q

What does each cluster of pigments consist of?

3

A

A variety of pigments

A strategically placed chlorophyll molecule

An electron acceptor

4
Q

What is the strategically placed chlorophyll molecule in a cluster of pigments called?

A

The reaction centre chlorophyll

5
Q

Where is the reaction centre chlorophyll located?

A

It is strategically located beside an electron acceptor

6
Q

How many chlorophyll molecules is there in a cluster of pigments?

A

There can be many chlorophyll molecules but there is only one strategically placed beside an electron acceptor i.e. there is only one reaction centre chlorophyll

7
Q

What is located beside the electron acceptor in a cluster of pigments?

A

The reaction centre chlorophyll

8
Q

What is the reaction centre chlorophyll?

A

A chlorophyll molecule located strategically beside an electron acceptor in a cluster of pigments

9
Q

What happens in each cluster when light is available?

A

In each cluster, the different pigments absorb light energy of different wavelengths (colours)

10
Q

What is the function of the cluster of pigments?

A

To absorb as much light as possible

11
Q

What happens after the different wavelengths (colours) of light have been absorbed by the different pigments in each cluster?

A

The different pigments transfer the absorbed energy from one to another until it reaches the reaction centre chlorophyll associated with the electron acceptor

12
Q

What happens when the absorbed energy reaches the reaction centre chlorophyll associated with the electron acceptor

A

Here the energy is transferred to electrons, causing them to become energised/high-energy electrons

13
Q

What happens to the electrons once they have become energised?

A

They are passed from the chlorophyll to the electron acceptor

14
Q

Where do the electrons become energised?

A

The reaction centre chlorophyll

15
Q

What happens to the electrons once they have been passed to the electron acceptor?

A

They then flow from the electron acceptor along one of two different pathways

16
Q

Name the two pathways that the energised electrons may flow along.

A

Electron flow: Pathway 1 - cyclic photophosphorylation

Electron flow: Pathway 2 - non-cyclic photophosphorylation