Bio paper 2 on 24th!!

[NouranAyman]

are you guys re-sitting the exam or doing it for the first time?

Im sitting for first time!

 

[Nishii]

Aoa wr wb,
See the question says that the chamber does not rises to the same height with each breath b/c O2 is absorbed in the lungs...
So you can simply calculate the fall in height over 1 min which comes out to be 1.5 box
If 4 boxes represent 1dm3
So 1.5 ---------> x
Solve it using unitary method
X = 1.5/4
X= 0.38 dm3min^-1

Thank You! all the best for your papers!

 

[L-Girl]

No it's AS level

where can i find this question?
plus do you have paper 22 june 2012?

 

[Z.S.M]

where can i find this question?
plus do you have paper 22 june 2012?

Here!

 

[L-Girl]

Here!

oh thank you so much! that is really kind of you much appreciated

 

[Z.S.M]

oh thank you so much! that is really kind of you much appreciated

Hey hey......... No prob!

 

[NouranAyman]

Hey hey......... No prob!

hey you done revizing??

 

[yazan1995]

Im sitting for first time!

Good luck!

 

[NouranAyman]

Good luck!

thanks nd u too

 

[Z.S.M]

hey you done revizing??

Yeah!

 

[NouranAyman]

Yeah!

same here isA we all do good is it ur first tym? or ur repeating?

 

[Amy Bloom]

look when one molecule of oxygen attaches to haemoglobin, it makes the attachment of 2nd oxygen molecule easier, and it makes the 3rd one's attachment easier (its written in cambridge university press book)

so conversely speaking (when we reverse the equations, just like chemical reactions in chemistry. The reaction which is good in forward direction, is poor in backward direction)
when one oxygen molecule leaves, it makes it harder for the next oxygen molecule to leave (

so
hb08----> hbo6 + 02 is fastest
and hb02 ----->hb +o2 is slowest

I HOPE THAT IM CORRECT BUT IM NOT SURE

Yeah i think you're right. My teacher told me something like that too, but i was unsure and what you said confirmed the answer.Your answer seems logical too.
Thanks Anwar and good luck for tomorrow, and insha allah you succeed

 

[anwar2400]

Yeah i think you're right. My teacher told me something like that too, but i was unsure and what you said confirmed the answer.Your answer seems logical too.
Thanks Anwar and good luck for tomorrow, and insha allah you succeed

ive already given my alevel papers. Had 3A* in sciences by the Grace of God

wish u best of luck

 

[Z.S.M]

same here isA we all do good is it ur first tym? or ur repeating?

i had to retake AS for improving my A2

 

[Z.S.M]

Best of luck everyone.
May Allah reward all our efforts!
Ameen!

 

[L-Girl]

Best of luck everyone.
May Allah reward all our efforts!
Ameen!

ameen

 

[Nishii]

The paper was nice and easy, right?

 

[Z.S.M]

The paper was nice and easy, right?

Yup! piece o cake!

 

[yazan1995]

Yup! piece o cake!

hmmm but i don't think the threshold will be high. 40/60 for A i guess

 

[Z.S.M]

hmmm but i don't think the threshold will be high. 40/60 for A i guess

Could be 46/60.