A level Biology: Post your doubts here!

[Galactic]

It doesnt matter if line is smaller or longer. Even mark scheme says allow if lines spread outside dish.

Thanks

 

[Alazne Diamond]

did anyone do M/J 2011 51?? If yes then did you get a straight line for da graph?

 

[joanna omar]

did anyone do M/J 2011 51?? If yes then did you get a straight line for da graph?

Yes,Approx

 

[joanna omar]

did anyone do M/J 2011 51?? If yes then did you get a straight line for da graph?

I didnt get Q1 (d)

 

[Alazne Diamond]

Yes,Approx

i don't get a straight line

 

[Alazne Diamond]

I didnt get Q1 (d)

hi5 evn m nt sure about dat one........hav to ask my sir.........i guess da answer i wrote in second one might be correct
in second part i wrote dat da experiments done are nt enough to know about starch and sugar, the graph shows only movement of substances so we don't know which r moving

 

[Alazne Diamond]

i don't get a straight line

dat question iz really weird

 

[joanna omar]

dat question iz really weird

Yeah it is even the the graph ..they are not giving enough space :/

 

[Alazne Diamond]

Yeah it is even the the graph ..they are not giving enough space :/

ya right

 

[bubbles1997]

Aoa. Please anyone can guide do tips for biology practicals.... for AS Level. Waiting for response anxiously

 

[bubbles1997]

please answer the following questions:
Q1. What is the size of a typical eukaryote and prokaryote?
Q2. Do we have to learn all the sizes of the organelles of a eukaryote?
Q3. what is centrifugation?

 

[asma tareen]

please answer the following questions:
Q1. What is the size of a typical eukaryote and prokaryote?
Q2. Do we have to learn all the sizes of the organelles of a eukaryote?
Q3. what is centrifugation?

If by size u mean diameter than prokaryote is 0.5 to 5 micro meter anfd eukaryote is 40 micro meters
we are supposed to know thw diameters
centrifugation :/ sorry haven't even heard of it

 

[Edward12345]

please answer the following questions:
Q1. What is the size of a typical eukaryote and prokaryote?
Q2. Do we have to learn all the sizes of the organelles of a eukaryote?
Q3. what is centrifugation?

centrifugation is the process of rotating at a very high speed in order to seperate the solids from liquids........

 

[bubbles1997]

o

If by size u mean diameter than prokaryote is 0.5 to 5 micro meter anfd eukaryote is 40 micro meters
we are supposed to know thw diameters
centrifugation :/ sorry haven't even heard of it

ok. Thanks.

 

[halloffame]

Hi,

What u guys think that about the questions related to which topic can come this
time in A2 Biology Exams . Have u done any survey through pastpapers or anything else.
Lets discuss over own opinions.

 

[NinjaInPyjamas]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Biology (9700)/9700_s11_qp_12.pdf

q15 - why is it 4 and 5?
q16
q23
thanks

 

[ZaqZainab]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Biology (9700)/9700_s11_qp_12.pdf

q15 - why is it 4 and 5?
q16
q23
thanks

q15 it a cholesterol molecule and protein channel and i as i have stiuded they are made up both hydrophobic and hydrophilic
q16 double will increase the fluidity due to difficulty of the kinked acyl tail to interact . Polyunsaturated fatty acids are liquid at room temperature whereas saturated and hydrogenated fatty acids (trans fats) are solid at room temperature.
q23 A and T makes 2 hydrogen bonds while G and C makes 3

 

[♣♠ Magnanimous ♣♠]

guys --> if anyone wants biology topical till chapter 6 so just contact me or quote this post.
ZaqZainab NinjaInPyjamas bubbles1997 Edward12345 Alazne Diamond joanna omar asma tareen
hope my post will help you a bit.

 

[Alazne Diamond]

guys --> if anyone wants biology topical till chapter 6 so just contact me or quote this post.
ZaqZainab NinjaInPyjamas bubbles1997 Edward12345 Alazne Diamond joanna omar asma tareen
hope my post will help you a bit.

i want them.......thnxx in advance

 

[Karim Nabil]

I was checking june 2011 p13 until i just noticed some extraordinary answers
is this markscheme correct or cambridge has just faulted
for eg: q17 must be B but markscheme says it is C (m/j 2011 p13)
this makes me a little bit concerned, especially this was repeated last sessions only!