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AS Biology P1 MCQs Preparation Thread

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Well the answer is D correct me if I'm wrong, okay explanation "W.p of cell = Pressure.p + solute potential".

okay so in the middle we have incipient plasmolysis you have to check the images for this, at this point, pressure potential is zero and both the water potential and solute potential are negative always (remember that solute potential can never be positive alright) so follow the equation at incipient plasmolysis water potential of cell = solute potential. lets go to turgid the water potential is zero why know since pressure potential can become more positive (it can exceed zero) WHEN THE CELL IS TURGID, and like i said the solute potential is always negative so "W.P of cell = 3.5-3.5" which is zero so "-" is for the solute potential and "+" is for the pressure potential and that only occurs when turgid okay, so W.p of cell is 0.
JazakAllah that really helped:) thanx a lot bro:)
 
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aoa wr wb
first time....did i ever have the feeling...there's been help for bio :ROFLMAO:

Anyway....thanks a lot to alll....!

Ya Allah...plz grant success in both worlds to all those who helped...and those who couldn't ....Aameen...YaAllah guide us all..to Jannah...and make us among the muttaqeen and saliheen...aameen!

wassalamoalaikum warehmatullahi wabarakatuh!
it seems like you are all prepped up for bio:p
 
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remember this... Ψ = Ψs + Ψp
and the pressure potential is always positive so X is pressure potential
now looking at the equation we know water potential is always negative, but solute potential has to be even more negative, cuz the pressure potential will be added to it, therefore Z is solute potential and Y is water potential :)
tx that really helped:)
 

XPFMember

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i mean...instant help...seriously....today....every single question i posted was cleared alhumdulilah...

It isnt the case always...
though can't obv forget 'ur' help..in my 'A2' .....May Allah reward u loads for that....aameen
 

Nibz

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i mean...instant help...seriously....today....every single question i posted was cleared alhumdulilah...

It isnt the case always...
though can't obv forget 'ur' help..in my 'A2' .....May Allah reward u loads for that....aameen
I was kidding. :p
 
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Well the net size i presume would be the size of the organisms themselves 7mm= earthworms and beetles
0.5 mm: small invertebrates
0.03mm: microorgansims

now look t the question "most important for breaking down", obviously the the ones with greatest difference 100-6=94, so this falls on 7mm wich are earthworms and beetles. :)
 
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okay look imagine Tom and Jerry. (I'm assuming u know who they are) Tom is the big scavenger and the little hole in the wall (mesh) is where Jerry hides. Now Tom can't squeeze his giant head into that teeny weeny little hole now can he? So who is it that can catch Jerry? any organisms that are smaller than the diameter of the hole(7mm). Same thing with the question..only small earthworms and beetles can cause the most damage. Big things come in small packages :p
heeeellpppppp
 
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okay look imagine Tom and Jerry. (I'm assuming u know who they are) Tom is the big scavenger and the little hole in the wall (mesh) is where Jerry hides. Now Tom can't squeeze his giant head into that teeny weeny little hole now can he? So who is it that can catch Jerry? any organisms that are smaller than the diameter of the hole(7mm). Same thing with the question..only small earthworms and beetles can cause the most damage. Big things come in small packages :p
looooooooooolll u made my day! and thanx:)
 
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