Photosynthesis: The Light Dependent Reaction | A Level Biology Revision | AQA
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- เผยแพร่เมื่อ 19 ต.ค. 2024
- Photosynthesis is one of the biggest topics you will cover in A Level Biology-and this will come up in the exam, guaranteed!
In this tutorial you will learn how light dependent reaction works and the steps that take place. Pay attention to details on this topic, and go over this tutorial a few times. The devil is in the details, and there are a lot of details required on the exam.
a) Chlorophyll absorbs light, leading to photoionisation of chlorophyll
b) Some of the energy from electrons released during photoionisation is conserved in the production of ATP and reduced NADP
c) The production of ATP involves electron transfer associated with the transfer of electrons down the electron transfer chain and passage of protons across chloroplast membranes and is catalysed by ATP synthase embedded in these membranes (chemiosmotic theory)
d) Photolysis of water produces protons, electrons and oxygen.
This is for all A-Level Biology AQA, OCR & Edexcel Students!
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i've just missed about 3 lesson on this reaction due to corona and you've just explained it in 12 mins. an angel. thank you so so much!
Glad it was helpful! :)
this video was so helpful! it made so much easier to understand. I wish you did one on the Calvin cycle thou.
I have made a video on the Calvin cycle - I actually have a lesson covering every aspect of the new spec for biology, as well as all the videos like this one I do live classes every week and answer all your questions every day. You can see it for yourself here tailoredtutors.co.uk/free-trial/
@@tailoredtutors thank you so much :)
You just made this very easy to understand, you the man.... Very beneficial video for those who want to learn the easiest way possible.... Thanks again
Such a clear, informative, helpful video! So much more concise than some of the other videos I have seen, thanks so much!
Hey Anna - you are so welcome! That's what we aim for with our courses. Glad you enjoyed it :)
thanks dude, making the living hell know as A Levels a little more bearable
Agreeing with Veronica - will you be publishing a video for the Calvin cycle?
Thanks you so much for this explanation😭😭, I couldn’t get my head around it at first. Some videos said that photolysis happens first etc, but this video is so clear and informative. Honestly you saved my life😭😄😁
Very well explained. Thank you.
where is the video for light independent reaction?????
Hey Megan, I have recorded a lesson on every single part of the A-Level spec for AQA, OCR and Edexcel! It coaches you on how to learn the content as quickly as possible plus I'm on hand to answer all your questions (24 hr turnaround time) as well as the right exam technique to use in the exams. FYI It's not free though as it's my full time job!
was very helpful
I wish lecture content was explained/taught like this at university
Excellent, this made it easier for me to understand.
Very helpful thanks very much
Very helpful video, thank you, really useful to help revising for alevels
I haven't actually covered this topic yet, but wow this was a good explanation
Thank you so much this was so helpful :)
Glad it was helpful!
fantastic video!
great video
Thanks!
Thanks for this vid!!!
Can I use this tutorial for Edexcel, or is it only specific to AQA
thank youuuuuuuuuuuuuuuuuuuuuu
ATP and NADPH are produced in light reactions. Can plants make these compounds without the dark reactions ??
Might sound like a silly question.
When does the photolysis of water occur? As soon as the light energy has been absorbed? Or simultaneously while all the other reactions are happening??
Haley B all these reactions happen simultaneously at the same time
Is the pumping of H+ ions against their concentration gradient considered to be in photosystem I or II?
It's part of the electron transport chain so it's both as the electrons flow from PS II to PS I via the electron carrier proteins in the thylakoid membrane.
Is this cyclic photophosphorylation or non cyclic photophosphorylation?
Are you going to do Light Independent Reaction video?
Where’s the independent reaction video??!!!
It's all in our course - I've done lessons like this covering every topic!
When the electron go down the chain releasing energy, is it used to form ATP or pump the H+ into the thylakoids space?
Both
The energy is used to pump H+ ions into the thylakoid space and the movement through ATP synthase via chemiosmosis provides the energy to produce ATP.
Why you did not mention some of the energy produced by electron transport chain is used to pump H+ ions into the thylakoid when you are writing the answer
is this 'non cyclic' phosphorylation
@@tailoredtutors non cyclic photophosphorylation uses both PS2 and PS1. It creates O2 and NADPH in comparison to Cyclic p. which only uses PS1 and does not create O2 and NADPH
Biology God
great
NADP+ right?
Love these videos, but some background music wouldn't go amiss to fill the silence :)
Are we meant to know about the role of Magnesium In this reaction for the OCR exam board ? Great video btw
no :)
A Falkus thank you