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B3 Biology Edexcel Exam

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novel-microalgal-growth-sys-700x378.png

i think its CO2 i put oxygen but it said in a closed system so i crossed it out
Original post by caitlinford3
ffs i wrote reabsorption too :frown:


I thought glucose is removed by re-absorption in the first convoluted tubule?
Reply 22
Original post by TSR778899
swear the question was about how it was reabsorbed into the blood? I put Selective reabsorption against the concentration gradient through the tubules?


Same I think it was re absorbed into the blood, I put exactly that too.
Original post by roshna00
I thought glucose is removed by re-absorption in the first convoluted tubule?


No, thats what i put but thats it reabsorbing into the blood, ultrafiltration is out of the blood
Reply 24
Original post by chrlhyms
novel-microalgal-growth-sys-700x378.png

i think its CO2 i put oxygen but it said in a closed system so i crossed it out


Algae respire aerobically though
Reply 25
Original post by chrlhyms
did people get carbon dioxide for the growth of micro algae? because of photosynthesis? and 52.94% for the maths one? im annoyed because i talked about reabsorption instead of ultrafiltration for the 2 marker on glucose out of the blood


I got carbon-dioxide and 52.94% as well. I also wrote about reabsorption rather than ultrafiltration. I can't remember what the question was.


Posted from TSR Mobile
Original post by chrlhyms
No, thats what i put but thats it reabsorbing into the blood, ultrafiltration is out of the blood


aaah I see. Oh well it's only a couple of marks :smile:
Original post by J__
Algae respire aerobically though


but plants dont grow from respiration, thats using up energy
I really liked the paper! I'm so glad it wasn't too hard since I was at a gig last night so didn't get much sleep but I feel like it went really well!
guys, i think we are right about the reabsorption because apparently it was "how is glucose removed from the nephron"
Reply 30
Original post by chrlhyms
but plants dont grow from respiration, thats using up energy

I thought respiration always releases energy not uses and photosynthesis just makes the glucose?
Original post by TSR778899
I thought respiration always releases energy not uses and photosynthesis just makes the glucose?


sorry i meant it releases energy, but it said how do the micro algae grow in a sealed environment
Reply 32
Original post by chrlhyms
but plants dont grow from respiration, thats using up energy


I was sure that it was oxygen, but I can't remember the question now.
Reply 33
Original post by chrlhyms
sorry i meant it releases energy, but it said how do the micro algae grow in a sealed environment


I think they'll mark both right because a sealed container doesnt mean no oxygen
Reply 34
Original post by chrlhyms
sorry i meant it releases energy, but it said how do the micro algae grow in a sealed environment


It would need oxygen to produce energy for growth
Original post by J__
I was sure that it was oxygen, but I can't remember the question now.


i was stuck on it for ages, it said " what gas would you supply to allow micro algae grow within a closed system"
Reply 36
Original post by chrlhyms
i was stuck on it for ages, it said " what gas would you supply to allow micro algae grow within a closed system"


It says "supply" - You can still have oxygen in a closed environment
Original post by J__
It would need oxygen to produce energy for growth



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Reply 38
Original post by chrlhyms
Screen Shot 2016-06-20 at 11.04.25.png


Both may get the mark, as respiration releases energy as well.
Original post by dan9909
I got carbon-dioxide and 52.94% as well. I also wrote about reabsorption rather than ultrafiltration. I can't remember what the question was.


Posted from TSR Mobile


I changed my answer from 52.9 to 47 since 170 X 0.47 is 80 but I'm not sure if I changed it from the right answer to the wrong answer :-(

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