Photosynthesis - Light-dependent Stage - Post 16 Biology (A Level, Pre-U, IB, AP Bio)

[@MrExhambio]

I have spotted a mistake in this video! - In cyclic photophosphorylation the electrons do not go all the way back to PSII, but just go back to the electron transport chain after PSII and then down to PSI again. So ONLY PSI is involved in cyclic photophosphorylation.

[@DrMilinda]

Thank you for this great video. I was just about to ask this question in cyclic photophosphorylation.

[@muhammadhamza9605]

thanks I was confused a bit.

[@sumbalnaz4742]

Thanx for clearing😋just about to ask that...

[@gp235801]

Just watched the video and wanted to point this out. In cyclic phosphorylation, the electrons are transferred from primary electron acceptor to ferrodoxin, then to Plastoquinone, then cytochrome b6f complex, then to plastocyanin and finally back to the reaction centre of PSI.

[@chrisly2775]

I'm so confused, around 6:24, you said... in the non-cyclic phosphorylation, it requires NADH and ATP to work. For what to work? And at the end of a long day, why does the plant become short of NADP+? And if it's at the end of a long day... Why would sunlight still be coming in? Also, WHY doesn't the electron need to be re-excited and charged? The electron is becoming weak as it passes through the ETC, (aids in pumping H+ ions into the lumen).... So how are you able to recycle these e-, if they are constantly losing power? So confused

[@strawberryjaemjaem2960]

Sir, you have just made the SIMPLEST method to teach and learn rather than my teacher explains it for a week! Mad respect!!!

[@lisahumphries2826]

Right??! Thought this video was REALLY GOOD

[@earthling6717]

Your teacher will be upset if he saw this 🤧

[@nioniengland]

you've made my day by explaining this process better than I've ever heard, thank you sir.

[@MrExhambio]

No problem !

[@husnapardis836]

I searched the whole internet for a good video and yours was the best thank you for this!!!

[@shamimhaque9014]

Someone give this guy best teach er award....

[@mayam4830]

this was the only video that actually explained photosynthesis to me in the necessary detail while still being clear and understandable. thank you so much!

[@snow-fd3ug]

oh my god after sitting through a lecture in class and watching so many videos, this one RIGHT HERE finally makes sense wowowow so good thank you

[@yhjsy]

First time leaving a comment on an educational video but i just had to because this is so so helpful!! Finally understand this after 2 years of trying to understand my textbook

[@MrExhambio]

Thank you 😊

[@harripancake5407]

Thank you so much sir, got a test tomorrow and my friend accidentally took my book when he left after we were done studying. This helped me refresh my memory, thanks again :)

[@MrExhambio]

No problem! Good luck in the test

[@munaalmaslamani2381]

Studying this for my SAT BIO in August and OMG! It’s so amazing and helpful! Helpful more than the notes that we write in class!!! Thank youu

[@johnturner4559]

Thank you for this, much better than the other drawn-out videos that I watched. Thanks again

[@sarahlange6134]

Thanks for this! Have a huge essay on my test tomorrow where we have to talk about the light dependent reactions. My book was making no sense to me and this really helped!!

[@loola7808]

Your videos are truly amazing. The best out there.You’re the reason I understood respiration and now photosynthesis!

[@MrExhambio]

Thank you 😊

[@imanipatrice9492]

Studying for this right before an AP Bio test😂 Update: I got a 4!!

[@MrExhambio]

Good luck !

[@swee_zaide]

How'd it go, mate?

[@bobby491]

Me too😂

[@imanipatrice9492]

@@bobby491 good luck!

[@ImLuel]

me to lmfao

[@ANDeoband]

I am an A level Biology teacher, and I found this video useful in preparing my lesson.

[@dedriannehartgers629]

This was better than the esciencelab that my son is doing. Much better explained. Thank you.

[@jfkangling7258]

Needed a review from today's class discussion of photosynthesis. This was a fantastic re-explanation for me! 😀

[@MrExhambio]

+JFK Angling excellent ! Glad to have helped

[@samruddhikulkarni811]

Well simply loved the video. No one mentioned it when both cycles occur but u did and loved the explanation

[@luthara3236]

Wow your videos are helping me a lot! I find that I understand your explanations better than my own teachers. Thank you so much!

[@khrystalkenndagsindal8512]

I love how the way this was made. It was a clean video and at the same time, easier to understand. It was also good when you managed to correct your own video ❤ Love your work.

[@SeghanSuraiya]

I really lack words to express my gratitude sir🤗🤗 The best explanation so far... Thank you

[@mahiraasif5514]

I never comment on videos but I just HAD to on this one. This was SO helpful! Thank you so much sir!

[@learningwhy6526]

Thank you so much. I was trying to figure out how all the processes were linked together and thankfully this video really helped clear things out.

[@mashilamphahlele7863]

YOU'RE TOO GOOD AT THIS.

[@ayushibatwara]

i LOVE your diagrams. i hope this prepares me well for my AP Biology test on monday! thank you-

[@natalieherrera-trejo6074]

You saved my life with this video! Very clear and easy to understand. Thank you so much!!!

[@alishaanimations3058]

You explained this so well I'm so grateful man Thank you thank you thank you I'll write your name in my test as appreciation

[@aribabadarpura8033]

OMG you are such a life saver I was so confused now I finally understand it. THANKS!!!!

[@狸貓-z9d]

thank you very much , this video really helps me a lot to understand the light dependant stage😭

[@狸貓-z9d]

the overall explaination of the light dependant and indepandant stage is easy to follow, it really helps me a lot.

[@ttekbokkikdrama3986]

Thankyouuu for making this lesson much more easier to understand

[@Ali-mv3jc]

Thank you! Your channel has been a life saver throughout lockdown, I would be stressed beyond belief without your amazing videos!

[@MrExhambio]

Glad you’ve found it helpful

[@secreswallowtail8763]

what's the word in 1:48? i can't understand it. the word before it is "produces".

[@dinoyt1916]

Hydrogen ions

[@mohammadaniyal]

This lesson was top notch thank you sir much respect!

[@MrExhambio]

+Mohammad Daniyal glad you found it useful

[@ms-np9ql]

Thank you so much. This is what I needed!! the other videos don't explain it well enough.

[@MrExhambio]

+maleehah surya thank you, glad you have found it helpful

[@0scarmackenzie]

Thanks for the really clear and concise video.

[@kashengchong4823]

Ive just learn this topic in my A2 syllabus last week and I'm here to refresh the information , but my lecturer mention that in cyclic photophosphorylation, Only PS1 is involved. but in this video, it says that it STARTS from PS2. can anyone explain and justified ?

[@labiduobi8895]

they say cyclic photophosphorylation only has PS I involved, how come PS II is in the process? please be answered kinda confused sorry

[@lovejarmy2421]

Omg thank u so much I got a 97% on my quiz!!!! Thank u mate!!!!!!!!!!😆

[@MrExhambio]

No problem! Well done

[@bethyeuong]

this video was so clearly explained. thank you so much!

[@maryamegy4497]

Learning biology and English at the same time😊 Thanx

[@abhashrivastava8492]

Wow. Will be using your videos during my final revision. :)

[@MrExhambio]

Thank you

[@Susu-jw3of]

Thanks for the great explanation. I need to present this topic to my class tomorrow lol

[@jenn3551]

helped more than crash course!!!! thanks so much

[@MrExhambio]

+Jenn thanks so much, that's praise indeed !

[@bagprataprudramishra]

Very helpful.. Tomorrow is my exam.. Thank u man!

[@dawnhirsh6263]

In cyclic phosphorylation, when the ATP is made, it is still made through the ATP SYNTHASE?

[@jonahansen]

Nice intermediate-level explanation.

[@abenitesema1516]

if the H+ goes to stroma throught the atp synthase ....why do we said LDR takes place in tylakoids

[@ETR.02]

Thank you for the video!!! The diagrams help a lot.

[@calygirl2706]

thank you for this lesson on photosynthesis I love the presentation. :)

[@MrExhambio]

+Calypso c. No problem, glad you liked it

[@lukehoshino2738]

Very clearly explained! Thank you

[@kylearrvytorres6793]

Questionnn.. what will happen to the NADP+ like will it be permanently gone? Or will it get replenished somehow by the plant

[@karimaakter2598]

does cyclic and non photophosphorylation happen at the same time? And THANK YOU, it was a great video😊👌

[@hafizumar4083]

ATP and NADPH are produced in light reactions. Can plants make these compounds in absence of dark reactions ??

[@revisionforyou7613]

Question , so you’ve lost 1 electron from ps II but you make 2 electrons from photolysis of water . You only need to replace one electron , why make 2?

[@dingyeenyi1922]

When the 2e- in the protein complex of the electron transport chain moves from cytochrome to photosystem 1, does it pumps a H+ ion through the thylakoid membrane too? Btw, amazing explanation here👍👍

[@cindylou6264]

i literally love you

[@juanagonzalez5749]

💚 This is an amazing explanation! Thank you so so so much!!!

[@konnanikn8563]

Will be coming back just for the intro

[@bread1448]

Sir you are great but iam going to show up in exams of o levels soon and my teacher has sent the video that we havent studied about yet like mostly video was going through my ear

[@MuhammadHassan-cm8pc]

same is happening with me

[@bread1448]

Bro you are my friend and we study in the same class

[@iztibamallikdeeba6914]

Excellent video. Thanks

[@Emma-rg1zd]

I don’t believe this was in the video, but where does p680+ come from? 😰

[@kamranfarook5343]

Best explanation on youtube. Thank you

[@MrExhambio]

Thank you!!

[@aishaa9561]

Best in-depth and interesting explanation. Won't forget it now, thanks a lot!!

[@MrExhambio]

+Mystery traveller thank you !

[@thecuriouscynic4720]

amazing explanation, thank you!!

[@sonjalewis3047]

Water being forcibly oxidized to replace the electron crucial to PS II is nothing short of phenomenal, and it is unfortunate when instructors understate this lynch pin--unique among life forces, as oxygen production is one of the major values of photosynthesis.

[@KungFuBarbie-pc7hb]

I think cyclic photophosphorylation is wrong. It doesn't involve PS2 the electron is excited directly from PS1 no?

[@El-rg8yx]

Thank you so much sir! You explained it really well

[@missmimiglamorazii]

Wow this is amazing! Thank YOU

[@lol-ie6nc]

have my exam tmrw, thanks LOOL

[@umasudev]

Thank u sir now I'm thorough in this topic thank u once again sir

[@erin7913]

I thought cyclic photophosphorylation only concerned photosystem 1?

[@mdbaccha9947]

It is a very good explanation

[@arisu7404]

Thanks man. I was clueless in my ib bio course

[@AbdullahAlMamun-ou3qg]

Nice explanation…Thanks.

[@dillonmcculley8224]

took my teacher 4 h to explain what you did in 20 min

[@maryjames4721]

Amazingly explained👍i could not understand this in my book😊

[@aratiratho6288]

Nice video sir

[@producer8z]

3:38-3:50

[@8a8trida76]

so nicely done

[@lanaali8534]

is this cie a level biology ?

[@suzanneagnesjeanninegruz3487]

very useful, Thank you

[@toribennett6853]

This helps me so much!! Thanks.

[@AyanoDuga]

hi boss I really appreciate your explanation

[@dayleallen3018]

I get everything until how ATP is produced :(

[@andpotato-1717]

Thank you very much, your video is very useful

[@albertmarti2718]

I believe the photosystems are really named after their evolutionary antiquity

[@TeddyTJBT]

its two electrons not one that is a very specific mark

[@safiyyahadlienna9143]

thank you very much sir for your great explanationa

[@rollyleneosigan2940]

Thank you so much for this.

[@Nvm12342]

God bless you

[@aquanatcha1081]

Thank you 🙏🏻🌷🌷🌷

[@DoctorKiranofficial]

absolute life-saver! thank you!

[@MrExhambio]

+itsKiran no problem

[@pforpoemiologist5934]

OMG!!! I can't digest this! So much informations... some of these I don't know! Pls help me!

[@hinasharif6708]

Thank you sir so much helpful

[@Immaculate_sonn]

This was helpful thank sir

[@nitikadesai7976]

best video ever

[@5gallonsofwater495]

Thank you very much sir.

[@angelbenny1584]

So helpful, thank you

[@dancebegable]

just saved my life

[@MrExhambio]

+Brittany Goodman thanks

[@brianhale3678]

But remember this irreducible process randomly emerged by itself in a completely functional organism with all its moving parts and all the secondary moving parts necessary for the cell function... because evolution is totally for real😉