username2889812
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:wavey:

im stuck at this question ...will be really grateful for all lovely help! :ta:

Describe the role of the electrons in light dependent reactions of photosynthesis

So I know how they help out with energy in electron transport chain and how they help in keeping photosystemII stable and not electron deficient...but the question is 4 marks and dont know what more could I include? :hmmmm:
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username2889812
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:bump:
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:bump::gah:
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Study Stream
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A bit of a late reply, but you could also include, that it is involved in both cyclic and noncyclic photophosphorylation, that it provides the energy to actively move H+ ions against its concentration gradient into the inter-thylakoid space, so it helps create a concentration gradient.
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(Original post by Study Stream)
A bit of a late reply, but you could also include, that it is involved in both cyclic and noncyclic photophosphorylation, that it provides the energy to actively move H+ ions against its concentration gradient into the inter-thylakoid space, so it helps create a concentration gradient.
:ta: it helps
But what are the pointers for 4 markers though :hmmmm:
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nievecooper40
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When light hits chlorophyll electrons become excited and leave the chlorophyll making it positively charged. Electrons are transferred down electron transfer chain, releasing energy as they do this. Electrons are used for formation of ATP and reduced NADP which can then be used in the light independent reaction of photosynthesis.
(Original post by Spannerin'moi)
:wavey:

im stuck at this question ...will be really grateful for all lovely help! :ta:

Describe the role of the electrons in light dependent reactions of photosynthesis

So I know how they help out with energy in electron transport chain and how they help in keeping photosystemII stable and not electron deficient...but the question is 4 marks and dont know what more could I include? :hmmmm:
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Infinite Series
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(Original post by Spannerin'moi)
:wavey:

im stuck at this question ...will be really grateful for all lovely help! :ta:

Describe the role of the electrons in light dependent reactions of photosynthesis

So I know how they help out with energy in electron transport chain and how they help in keeping photosystemII stable and not electron deficient...but the question is 4 marks and dont know what more could I include? :hmmmm:
I would just write everything that the electron does in the process, in hope that i'll get the marks. The things I've highlighted are what i'm most confident will obtain a mark:

Electrons would be raised to a high energy level (at the start)
Electron are passed from photosystem II to carriers (in thylakoid membrane)
Electron causes pumping of protons into the thylakoid
Electron passes to photosystem I at end of carrier chain
Electron re-excited and emitted by photosystem I
Electron used to reduce NADP+
Last edited by Infinite Series; 1 year ago
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username2889812
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(Original post by nievecooper40)
When light hits chlorophyll electrons become excited and leave the chlorophyll making it positively charged. Electrons are transferred down electron transfer chain, releasing energy as they do this. Electrons are used for formation of ATP and reduced NADP which can then be used in the light independent reaction of photosynthesis.
:ta: for help
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username2889812
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(Original post by Infinite Series)
I would just write everything that the electron does in the process, in hope that i'll get the marks. The things I've highlighted are what i'm most confident will obtain a mark:

Electrons would be raised to a high energy level (at the start)
Electron are passed from photosystem II to carriers (in thylakoid membrane)
Electron causes pumping of protons into the thylakoid
Electron passes to photosystem I at end of carrier chain
Electron re-excited and emitted by photosystem I
Electron used to reduce NADP+
:ta: for the pointers
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