IGCSE/GCSE/O & A Level/IB/University Student Forum
Qualification => Subject Doubts => GCE AS & A2 Level => Sciences => Topic started by: hesho21 on May 26, 2010, 03:32:39 pm
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I took paper 11 and it was really nice.This topic is to dicuss the exam after 24 hours so "no cheating" :D anyway it was easy thank god , how did u think of it?
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lots of tricky questions!! no way near to easy man!
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yes agree..it was abit tricky..had to think so much of many questions..but it was not bad!!
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Are you people sure its bio paper1?????
cuz in KSA we have it like after 10 days....must have been physics if i'm not mistaken
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ween 3aysh ent?? r u takin bio As as CIE??
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Are you people sure its bio paper1?????
cuz in KSA we have it like after 10 days....must have been physics if i'm not mistaken
Dude ure taking IGCSE not AS :) and yeh there was a few tricky but it was normal I guess :D
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Well, I guess it was cool, I did the exam today .. & I live in Saudi ..
Which area/city do you live in hesho21?
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I live in Kuwait , took the exam 5 hours ago :D
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Haha the thread moved on fast :P
I was talking to that ABF person .. considering he/she STILL hasn't given them. =\
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Haha the thread moved on fast :P
I was talking to that ABF person .. considering he/she STILL hasn't given them. =\
LOL thats a nice one :D now u know where I live :P
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It was seriously good! Quite a few repeated questions! :)
No seriously, thresholds gna be high =/
But was good ^^
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It was seriously good! Quite a few repeated questions! :)
No seriously, thresholds gna be high =/
But was good ^^
Yeh I agree :D the only thing that is worrying me though is the practical cuz I suck at it seriously :)
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Yeh I agree :D the only thing that is worrying me though is the practical cuz I suck at it seriously :)
I agree too. Since papers 1 and 2 were fairly on the easier side, pracs are gna create havoc :-\
Anyhows, best of luck! :)
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I agree too. Since papers 1 and 2 were fairly on the easier side, pracs are gna create havoc :-\
Anyhows, best of luck! :)
U too :D
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i believe thresholds gonna be low due to practical nd a bit cuz of p1 but damn p2 rockd !!
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i believe thresholds gonna be low due to practical nd a bit cuz of p1 but damn p2 rockd !!
Agree , but u know I stopped thinking about thresholds , cuz it'll just keep u worrying , the most important thing is that u have achieved ure best , hopefully :)
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my paper went good!
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my paper went good!
that's gd to hear :D
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There were a few recycled questions but there were some tricky questions also. Hope the grade threshold is gonna be like 30/40 for an A.
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There were a few recycled questions but there were some tricky questions also. Hope the grade threshold is gonna be like 30/40 for an A.
yeah i hope so to, but i think its gonna be 33/40, cuz not all the questions were hard
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Cool
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i would tell u but then i will get banned ;)
soo...
dont discuss content of the exam untill 24hrs are done
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Its been 24 hours since I sat the exam :P (NZ here)
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Its been 24 hours since I sat the exam :P (NZ here)
well i guess u will have to wait another 24 hrs :P
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i would tell u but then i will get banned ;)
soo...
dont discuss content of the exam untill 24hrs are done
Thanks Unknown101.
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Thanks Unknown101.
This is getting way to complicated.
the reason CIE shifted the timings from 9 am to 11 am and from 1 pm to 3pm for afternoon session is that most almost all of the exams around the world end at this period of time.
i Just saw the newsletter today infront of the examination hall
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i think the paper wasnt THAT easy as all of you say.. really tricky..if you didnt read properly easy marks would have been lost...
anyways i have several questions ...
what did u guys write for questions 1-3
and what about the 2 questions concerning the heart... one with the electircal impulse diagram nd the other talking about the a heart disease in which the semi lunar valve where damaged or something like that...
also there was a question about seive tube elements in photosynthesising plants and in actively growing roots... ??
finally... question 40..???
if you guys could answer my questions above that would be more than great.... :)
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i think the paper wasnt THAT easy as all of you say.. really tricky..if you didnt read properly easy marks would have been lost...
anyways i have several questions ...
what did u guys write for questions 1-3
and what about the 2 questions concerning the heart... one with the electircal impulse diagram nd the other talking about the a heart disease in which the semi lunar valve where damaged or something like that...
also there was a question about seive tube elements in photosynthesising plants and in actively growing roots... ??
finally... question 40..???
if you guys could answer my questions above that would be more than great.... :)
1. D (xylem then nucleolous then ribosome.
2. C (you cant see the ER because they are very close to each other and light microscope has low resolution)
3. i put A, i dont know if its right. though i know its either A or C
question about heart it was P and T
for the valve one i put A about tendons, but alot of people put C.
for the seive tube question it was low water potential and sucrose leaving.
and q40. it was B as i remember. same community and same trophic level, NOT same habitat and NOT same niche.
:D
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1. D (xylem then nucleolous then ribosome.
2. C (you cant see the ER because they are very close to each other and light microscope has low resolution)
3. i put A, i dont know if its right. though i know its either A or C
question about heart it was P and T
for the valve one i put A about tendons, but alot of people put C.
for the seive tube question it was low water potential and sucrose leaving.
and q40. it was B as i remember. same community and same trophic level, NOT same habitat and NOT same niche.
:D
thx alot man :D
really helper me out here....
what other difficult questions where there ??
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I put sucrose entering the roots rather than leaving simply because the leaves are usually the source, where glucose is converted to sucrose and carried to the sink, usually storage organs or organs that are actively respiring and growing such as the fruits, the roots and the apical stems and in this case, they mentioned actively growing roots. Yeah, water potential is low because of mass flow and also increasing sucrose concentrations.
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my friend, sucrose enters the seive tub from a source (leaf) and leaves it at a sink (root).
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It Was Soo Tricky actually...Am Startin' To Hate this Subject
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Ahh, crap, got confused there XD That's 1 question down
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1. D (xylem then nucleolous then ribosome.
2. C (you cant see the ER because they are very close to each other and light microscope has low resolution)
3. i put A, i dont know if its right. though i know its either A or C
question about heart it was P and T
for the valve one i put A about tendons, but alot of people put C.
for the seive tube question it was low water potential and sucrose leaving.
and q40. it was B as i remember. same community and same trophic level, NOT same habitat and NOT same niche.
:D
For the ecology question, I wrote that they have the same community and same habitats because it was clearly written that they lived in the 'same' forests bla bla
And the cell you can see under LM I wrote the one which mitochondria could be seen and Golgi but no ER, because it had a high magnification
You are freaking me out! :o
What about what happens to the X and Y when moderate exercises ...
And which cells are placed in which solution
And which processes allow materials in and out? This question confused me because I had in mind it'll be a tricky question :/
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For the ecology question, I wrote that they have the same community and same habitats because it was clearly written that they lived in the 'same' forests bla bla
And the cell you can see under LM I wrote the one which mitochondria could be seen and Golgi but no ER, because it had a high magnification
You are freaking me out! :o
What about what happens to the X and Y when moderate exercises ...
And which cells are placed in which solution
And which processes allow materials in and out? This question confused me because I had in mind it'll be a tricky question :/
1. D (increase-increase)
2.D(cant remember the choices :P )
3.all of them :S
anyone with different answers plz write them down :)
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I'm so happy, most of my answers match up =P
But for the ecology question, shouldn't it be the option '1 and 4'? Their niche is definitely different and their community/habitat is definitely same.
Also, under the light microscope, I think it would be the option with the nucleus and ER visible, because mitochondria are the largest of cytoplasmic organelles and lysosomes are the last most probable organelles to be seen under the microscope.
The cells were 3 and 5 in the plasmolysed state, in solution of 1 mol dm-3 sucrose but I don't remember the cell in the salt solution.
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I'm so happy, most of my answers match up =P
But for the ecology question, shouldn't it be the option '1 and 4'? Their niche is definitely different and their community/habitat is definitely same.
Also, under the light microscope, I think it would be the option with the nucleus and ER visible, because mitochondria are the largest of cytoplasmic organelles and lysosomes are the last most probable organelles to be seen under the microscope.
The cells were 3 and 5 in the plasmolysed state, in solution of 1 mol dm-3 sucrose but I don't remember the cell in the salt solution.
Ya .. I got 3 and 5 in 1M sucrose and 2 & 4 in 0.1M salt soln
About the moderate exercise question, it should be decrease and decrease because X and Y were the variables for the volumes of air above the tidal volume so if it increased then X will decrease
Yes .. I got 1 & 4 only too for the ecology question
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X and Y is increase, increase
THEY DO NOT HAVE THE SAME HABITAT, IT CLEARLY SAYS ONE WAS IN A FOREST AND THE OTHER IN GRASSLAND. THEY LIVE IN THE SAME COMMUNITY AND THEY ARE THE SAME TROPHIC LEVEL.
for the cells question yeah it was D, and i think it was something like 2 and 4, 3 and 5.
but yeah D.
for the processes question, it was all of them.
for the magnification question, Mitochondria Can Be Seen Under The Microscope thats right, BUT in that choice you had ER too, and you cant see ER, so it was C, because even there are a number of differently sized mitochondrion's so yeah i dont know.
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They said they live in the same area of forest and grassland , so I think by mentioning same "area" then they mean same habitat..
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how can one live in a grassland and the other in a forest and have the same habitat? :s
by same area they meant....trying to confuse you :)
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how can one live in a grassland and the other in a forest and have the same habitat? :s
by same area they meant....trying to confuse you :)
agool bas mesawy genius!! etla3 menhhhhaaaaa!! :P
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How can one live in the same community but not the same habitat? They say both of them lived in the same area of a forest and grassland. They didn't say one of them lived in the grassland and other the forest, no? A community is different species living at the same place at the same time...so most likely, a common habitat.
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How can one live in the same community but not the same habitat? They say both of them lived in the same area of a forest and grassland. They didn't say one of them lived in the grassland and other the forest, no? A community is different species living at the same place at the same time...so most likely, a common habitat.
That's what I'm talking about, why else would they mention the same area , which is actually the definition of habitat "same area" :D Somebody ask his biology teacher plz :P
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what did u guys write for questions 1-3
and what about the 2 questions concerning the heart... one with the electircal impulse diagram nd the other talking about the a heart disease in which the semi lunar valve where damaged or something like that...
also there was a question about seive tube elements in photosynthesising plants and in actively growing roots... ??
finally... question 40..???
if you guys could answer my questions above that would be more than great.... :)
1- B
2- C
3- B
for the electircal impulses diagram it was option B. P and T one.
and for the heart disease it was option D. the one which said the left ventrical gets enlarged.
for the sieve tubes one sucrose would move out in the roots while water potential in the leaves increases. i guess that was option D.
and for 40 the correct ans was decrease decrease. i chose the wrong option for this one :-[
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X and Y is increase, increase
THEY DO NOT HAVE THE SAME HABITAT, IT CLEARLY SAYS ONE WAS IN A FOREST AND THE OTHER IN GRASSLAND. THEY LIVE IN THE SAME COMMUNITY AND THEY ARE THE SAME TROPHIC LEVEL.
for the cells question yeah it was D, and i think it was something like 2 and 4, 3 and 5.
but yeah D.
for the processes question, it was all of them.
for the magnification question, Mitochondria Can Be Seen Under The Microscope thats right, BUT in that choice you had ER too, and you cant see ER, so it was C, because even there are a number of differently sized mitochondrion's so yeah i dont know.
how in the hell is it increase, increase? moderate exercise=deeper breathing=higher tidal volume so X will clearly decrease!
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how in the hell is it increase, increase? moderate exercise=deeper breathing=higher tidal volume so X will clearly decrease!
is X-decrease Y-increase correct then?
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Why would a higher tidal volume decrease X?
Decreasing the volume of maximum air breathed in and henceforth, breathed out, means that for any given time, the amount of air taken in (and so, oxygen) is less. So, the quantity of fresh air in the lungs decreases every passing unit time. Also, with less air breathed out, the stale air is not being thrown out as efficiently as it would be with an 'increase in Y'. So, basically, moderate exercise should result in death of a person in a matter of a minute because he is typically destroying his diffusion gradient.
It's true that an increase in tidal volume would occur; but if anything it should increase the vital capacity, because it will most definitely decrease the residual air, one way or another.
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i dont noe wat u guys r sayin but it was pretty simple rite.......a persons vital capacity should stay constant however when a person does excercise his tidal volume should increase therefore curve goes up so X decreases and Y increases :P
And i think for the other question abt sucrose it was tricky.......they didnt ask low or high...they asked increase or decrease
so as u noe the concept of mass flow after sucrose is loaded water enters phloem my diffusion INCREASING the water potential creating a hydrostatic pressure so i doubt its LOW as many of u said...............