That’s really cool professor. I am sitting for most toughest competitive exams in India and your videos are making my exam preparation easier. Thank you for your effort 👍🏻
I am continually amazed by the breadth of subject Prof Dave does videos on. Rubisco is such an interesting enzyme. It's just about the most common enzyme you'll find in any plant cell, is incredibly slow by enzyme standards, and doesn't much care what direction it catalyses. Yet it's one of the most ancient and highly conserved enzymes in existence. What's been driving that 'lack' of evolution for billions of years when one would expect plants would really 'like' something better? My best guess is it initially evolved to 'soak up' O2 when all life 'regarded' oxygen as a poison. For such a purpose you want: -a lot of it to 'catch' every oxygen molecule as soon as possible -so it didn't need to be efficient -it did need to work so once functional there would be huge evolutionary pressure not to 'experiment'. Some life discovered photosynthesis and Rubisco turned out to be useful for that as it would run backwards. Great, but now you need even more of it because 'whoops, there's even more of that nasty oxygen about!' So the pressure not to mess with a functional solution gets even bigger. Finally you get some cells discovering the trick of aerobic respiration and so a poison becomes useful, when its not being poisonous. Before you know it you've got eukaryotes; the aerobic heterotrophs don't need Rubisco any more and ditch it, but the autotrophs are stuck with it warts and all. It's a nice story, I'm afraid I'm not knowledgeable enough on the subject to know if it might be true.
Dave this has nothing to do with this video. I just watched your discussion with Jesse Lee Peterson and had a good laugh. Hyperbole vs logic at its finest. Thanks for your awesome channel, whether educational or educational I rest my case
I don't understand how to calculate this problem. Consider the fixation of carbon dioxide leading to the production of an amylose chain 30 glucose sub units long. Calculate the following: (a) the number of CO2 molecules fixed; (b) the number of ATP molecules consumed; (c) the number of NADPH molecules oxidized.?
Thankyou professor...i am from india preparing for neet medical exam and looking for a vedio which will help me.....and here is the vedio of you welcoming me all the way along....thanks from ma heart❤️
that process is called Carbon fixation, or in other words transforming carbon dioxide into other forms to store and to be used later, like into Malate or malic acid. it is then transformed back into co2 and used in the photosynthesis. just like storing sugar into fatty acid, and then transformed back into sugar when needed.
Wait... in CAM plants, didn't you just say it open the stomata to keep H2O? And then you say during the day, it closes the stomata to keep H2O. Can you bring clarification?
Not going to lie. I saw the thumbnail and I thought it was a meme trying to show how one should drive in a roundabout... And now I feel like it should be
not really, they need light to do photosynthesis. but they dont get dehydrated because they evolve to keep stomata close during the day, and opens during the night.
@sunergi ... woosh. I mean, if they only open their stomata at night, would they suffocate and never have co2 to breath if you just kept them under a grow light 24/7. Is it darkness itself that triggers the stomata opening, and how strict are they about that responce. In nature there would be no situation that would prepare them for 24/7 light. Cacti don't live above the arctic circle.
CAM planta do photosynthesis during daytime, since they still need Sunlight to do the process. and oxygen is a byproduct of photosynthesis so oxygen is also released during the daytime by plants. while CO2 is always around too, 24/7
P. Dave. I just spent 2 days tying to teach someone what the “scientific method” is. They were convinced that the only “real” science was a strict adherence to “observation”-“hypothesis”-“experiment”... and that experiment was only “manipulating” a single IV and seeing how a single “DV” was changed. I was sadly ineffective in my discussion. Maybe a couple of videos from you in this topic could be helpful?
@@ProfessorDaveExplains that's great! I'm waiting :) thank you, for the response and the videos, great explanations! I found them recently, and they are helping me understand plants better. I have a dream to some day start building agroforests, and these biology foundations I find very important!
for cactus, its entire body is the would-be leaf that does photosynthesis. while the Thorns or spikes evolved into protective features instead, if they remain as leaves then they would lose water
I just got some plants last week and in the midst of being a millennial struggling to keep plants alive, I was thinking about this exact thing. What a happy surprise
How about a series on the history of STEM? from all the way back to the egyptians bolstering the development of the geometry field to modern mathematicians like Terence Tao?
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Hello professor dave I am from Somalia And I have been watching you two years ago and i have benefited a lot from you thank you
for*
You have Wi-Fi there?!
@@hassenfuad7258 wrong. It should go “I have been watching you” -> “I began watching you” because she said “two years *ago*”
Nice
@@arielthemermaid3576 insert meme "why are you the way that you are?"
That’s really cool professor. I am sitting for most toughest competitive exams in India and your videos are making my exam preparation easier. Thank you for your effort 👍🏻
Which exam? NEET?
Neet?
I’m studying for Neet
Thank you Professor Dave! Just the video I needed! As always, very well done!
Thumbs up if you are watching this before writing Biology test.
😅
I've learnt alot from dave over the years 👍
*I learnt all the three processes in just one video. Thanks*
My first interaction with this topic was a 2nd year university assignment that asked to explain Kranz anatomy.
your video helped me gain 6 free marks in my endsem exams thank you so much.
He knows a lot about the science stuff. 👏🏽
Hello i am from Ethiopia 🇪🇹
Me to
professor dave always comes in clutch the night before an exam. thank you!!
Love from south India
Tnx Dave one day I will pay your gratitude
I am form india and subscribe you.
Thanku so much professor Dave
Here since 90k!
This is my first time of listening to you and I Guinea lots from it
Unmatchable, great sir dave
I am continually amazed by the breadth of subject Prof Dave does videos on.
Rubisco is such an interesting enzyme. It's just about the most common enzyme you'll find in any plant cell, is incredibly slow by enzyme standards, and doesn't much care what direction it catalyses. Yet it's one of the most ancient and highly conserved enzymes in existence. What's been driving that 'lack' of evolution for billions of years when one would expect plants would really 'like' something better?
My best guess is it initially evolved to 'soak up' O2 when all life 'regarded' oxygen as a poison. For such a purpose you want:
-a lot of it to 'catch' every oxygen molecule as soon as possible
-so it didn't need to be efficient
-it did need to work so once functional there would be huge evolutionary pressure not to 'experiment'.
Some life discovered photosynthesis and Rubisco turned out to be useful for that as it would run backwards. Great, but now you need even more of it because 'whoops, there's even more of that nasty oxygen about!' So the pressure not to mess with a functional solution gets even bigger.
Finally you get some cells discovering the trick of aerobic respiration and so a poison becomes useful, when its not being poisonous. Before you know it you've got eukaryotes; the aerobic heterotrophs don't need Rubisco any more and ditch it, but the autotrophs are stuck with it warts and all.
It's a nice story, I'm afraid I'm not knowledgeable enough on the subject to know if it might be true.
DO YOU KNOW that RUBISCO is the most abundant enzyme in world ....awesome right🥳
For me it was the the most shocking when i got to know it was made by genomic and extra genomic DNA both in plant cells chloroplast
It hasn't evolved because they take the factorio approach; they just spam more of it to make up for lower efficiency
No shit guys, he knows alot about the science stuff (unlike those flat earthers out there)
Really well explained my friend! I'll be linking to this video!
Dave this has nothing to do with this video. I just watched your discussion with Jesse Lee Peterson and had a good laugh. Hyperbole vs logic at its finest.
Thanks for your awesome channel, whether educational or educational
I rest my case
Thanks man
It's very helpful
This was amazing. Thank you!
Crushed it, Dave.
That's really cool... Thanks for your effort sir
I have my exam on this tomorrow thanks so much Dave!!!!
I don't understand how to calculate this problem.
Consider the fixation of carbon dioxide leading to the production of an amylose chain 30 glucose sub units long. Calculate the following: (a) the number of CO2 molecules fixed; (b) the number of ATP molecules consumed; (c) the number of NADPH molecules oxidized.?
ruclips.net/video/TF_c_9GyObI/видео.htmlsi=k-jA453sMRfsDI4D
wow what an explanation brilliant🙃
Very helpful for my plant fisiology class, thank you :)
is there hope?? I feel like there is too much information to learn
Thankyou professor...i am from india preparing for neet medical exam and looking for a vedio which will help me.....and here is the vedio of you welcoming me all the way along....thanks from ma heart❤️
For the legal states, you can add Mj as a C3 plant
Thank you Professor Dave, this was very helpful for my upcoming ecology exam!
The resulting 4 carbon compound? How is malate formed in the mesophyll cells from OAA??
that process is called Carbon fixation, or in other words transforming carbon dioxide into other forms to store and to be used later, like into Malate or malic acid.
it is then transformed back into co2 and used in the photosynthesis. just like storing sugar into fatty acid, and then transformed back into sugar when needed.
Malaye dehydrogenase enzyme
Perfect, thank you
Dis z excellent. Thank u 💓
Thanks 💖💖
Hi! Could you please give the wide list of c3 and c4 plants.
2:04 "Burn through carbon previously fixed by the Calvin cycle" what does that mean
Check out my original tutorial on photosynthesis for the general information.
Hey it means it uses atp previously fixed by the c3 pathway to release co2
Wonderful explanation
awesome explanation
Yo Professor 👏🏻
Information is Insufficient
But explained adequately than my school teacher
So mean
Thank you very much professor Dave😍
Thank you professor Dave this is very helpful for my lecturer biology test
Thanks that's really helpful
Love ❤ from India
definitely helped, especially when I slowed the speed down by 25 %.
Thank you Professor Dave. Nice video !👍
Do you consider this high school or university level biology?
I think freshman undergrad.
thankyou i am in 10th and your video helped me a lot to understand this topic easily
You are good at explaining sir thank you.
thank you so much 👍
Wait... in CAM plants, didn't you just say it open the stomata to keep H2O? And then you say during the day, it closes the stomata to keep H2O. Can you bring clarification?
This was helpful
Thanks Dave, would've helped me last semester.
Very nice, thank you for doing this topic
Thank you
Thank you Professor Dave! This is the video I needed to learn this! Now I know this!
Not going to lie. I saw the thumbnail and I thought it was a meme trying to show how one should drive in a roundabout... And now I feel like it should be
Thankyou so much....
Really enjoyed watching this video - thank you
wow thank you thank you thank you!!!!
Does this count towards anything for his continued education programs?? It definitely should
Does this mean that CAM plants would die if they were kept under continuous light?
not really, they need light to do photosynthesis.
but they dont get dehydrated because they evolve to keep stomata close during the day, and opens during the night.
@sunergi ... woosh.
I mean, if they only open their stomata at night, would they suffocate and never have co2 to breath if you just kept them under a grow light 24/7.
Is it darkness itself that triggers the stomata opening, and how strict are they about that responce. In nature there would be no situation that would prepare them for 24/7 light. Cacti don't live above the arctic circle.
But what about Portucala Oleracea (common purslane) a plant that does factultative cam and c4 photosynthesis :D
Thank you sir ,
Thank you for the video. So are there any angiosperms that have conversantly evolved to do C4 photosynthesis?
In CAM plant, when O2 release into environment? If answer night, where is the O2 in the daytime?
CAM planta do photosynthesis during daytime, since they still need Sunlight to do the process.
and oxygen is a byproduct of photosynthesis so oxygen is also released during the daytime by plants.
while CO2 is always around too, 24/7
@@sunergi Are CAM plant' stomata closed during daytime? Where is O2 leave? Pl. kindly explain.
Why isn't this in your botany playlist
it is
Thank you very much for your video. If they are all angiosperms- why would convergent evolution? Was that only for specific metabolic pathways
Ah! The another nice one
Can always count of prof dave. Looking forward to a question on this on my final thanks to you.
P. Dave. I just spent 2 days tying to teach someone what the “scientific method” is. They were convinced that the only “real” science was a strict adherence to “observation”-“hypothesis”-“experiment”... and that experiment was only “manipulating” a single IV and seeing how a single “DV” was changed.
I was sadly ineffective in my discussion. Maybe a couple of videos from you in this topic could be helpful?
머리속이 한번에 정리 되었네요
감사합니다!
nice, clear differentiation! learned lots :)
Thanku sir nice 👍🏿 session
The other videos are appearing private to me. Is I because they are not released yet?
Yep they'll all be out soon!
@@ProfessorDaveExplains that's great! I'm waiting :) thank you, for the response and the videos, great explanations! I found them recently, and they are helping me understand plants better. I have a dream to some day start building agroforests, and these biology foundations I find very important!
Where (cell) is chloroplast in cam plants?
for cactus, its entire body is the would-be leaf that does photosynthesis.
while the Thorns or spikes evolved into protective features instead, if they remain as leaves then they would lose water
In c4 plants where does the carbon dioxide comes from ???
I am asking the same thing but cannot find the answer
i think from mitochondria a little amount off carbon dioxide came
i think from mitochondria
Thanks!! really clear!
Wow 🤩
I like it thanks
I just got some plants last week and in the midst of being a millennial struggling to keep plants alive, I was thinking about this exact thing. What a happy surprise
When you can't understand this thing at school, but you understand this here
How about a series on the history of STEM? from all the way back to the egyptians bolstering the development of the geometry field to modern mathematicians like Terence Tao?
Searched C3 vs C4 and came here. I wanted corvettes but instead I got science
Thank you very much.can you add references to the video.if this is possible?
I'm from India 🇮🇳
Nice
Great
Aren't all grasses C4?
I had no idea
hell yeah
How you made educational videos
This will never enter my brain
🙌🙌🙌
plants that use which kind of photosynthesis are best for peeing on?
" Can a dog come from a protista? " - Kent Hovind 😂
I got here by eating president cookies
King