biology practical

[sunstar]

HERE YO GO!I CAME TO KNOW ABOUT IT FROM MY FRIEND.

*Its like Yeast in gonna be there in both Question(1&2)--->(Serial dilution and Slide)

1) We are gonna have YEAST, to which you will add 1 drop Methyl-Blue, then check under Microscope, if cells are BLUE--->then the cells are DEAD, but if cells are YELLOW--->they are LIVING.

2)They may ask to state about:-
#MODIFICATION:-Use calorimeter(to find the end-point), Repeat more than once.
#RELIABLE RESULTS:-Repeat the experiment and calculate the Mean, Increase the range of Concentrations, Record the result in shorter intervals.
#ACCURACY:-Use Stopwatch, use Digital-Thermometer, use Calorimeter, use a temperature to control Water-bath.

3)Serial-Dilution of yeast okay...

well, This is about V33... can you help me in V32? I have been begging for help from everybody and no one replies
so if you please could help me with any guess... I would be too grateful
Thnx in advance
Good luck with ur exams (Y)

 

[dumb human]

well, This is about V33... can you help me in V32? I have been begging for help from everybody and no one replies
so if you please could help me with any guess... I would be too grateful
Thnx in advance
Good luck with ur exams (Y)

I am not sure about 32, But most probably u will have food test, because we didn't have that,
graph of course,
then these====>#MODIFICATION:-Use calorimeter(to find the end-point), Repeat more than once.
#RELIABLE RESULTS:-Repeat the experiment and calculate the Mean, Increase the range of Concentrations, Record the result in shorter intervals.
#ACCURACY:-Use Stopwatch, use Digital-Thermometer, use Calorimeter, use a temperature to control Water-bath.

well just go through past-papers of variant 32 you know.
if i come to know anything, i will surely tell you =)

 

[sunstar]

I am not sure about 32, But most probably u will have food test, because we didn't have that,
graph of course,
then these====>#MODIFICATION:-Use calorimeter(to find the end-point), Repeat more than once.
#RELIABLE RESULTS:-Repeat the experiment and calculate the Mean, Increase the range of Concentrations, Record the result in shorter intervals.
#ACCURACY:-Use Stopwatch, use Digital-Thermometer, use Calorimeter, use a temperature to control Water-bath.

well just go through past-papers of variant 32 you know.
if i come to know anything, i will surely tell you =)

ThanQ you so much.... But I dont think food test going to come cuz v31 already had food test...
They had to carry out semi-quantitative experiment with glucose by carrying serial dilution and to find 2 unknowns
That's why I was wondering which exp may come especially that my teacher refused to help and all she told me was it maybe enzymes , and as you got the yeast exp I couldnt predict any of the exp...
Anyways thnx for ur help and I will be waiting ur reply asasp
I appreciate ur reply

 

[dumb human]

ThanQ you so much.... But I dont think food test going to come cuz v31 already had food test...
They had to carry out semi-quantitative experiment with glucose by carrying serial dilution and to find 2 unknowns
That's why I was wondering which exp may come especially that my teacher refused to help and all she told me was it maybe enzymes , and as you got the yeast exp I couldnt predict any of the exp...
Anyways thnx for ur help and I will be waiting ur reply asasp
I appreciate ur reply

oh!!! then i think you must refer through everything you know!!
i think 32 is a mixture of 31 and 33 lol =P

 

[MYLORD]

ThanQ you so much.... But I dont think food test going to come cuz v31 already had food test...
They had to carry out semi-quantitative experiment with glucose by carrying serial dilution and to find 2 unknowns
That's why I was wondering which exp may come especially that my teacher refused to help and all she told me was it maybe enzymes , and as you got the yeast exp I couldnt predict any of the exp...
Anyways thnx for ur help and I will be waiting ur reply asasp
I appreciate ur reply

so r u 100% sure that enzymes is coming??
after doing our last pactical on food tests in april our teacher gave us an extra paper on enzymes reaction which had amylase thingy related ?
Any guesses??
It will be a GREAT help !!

 

[happyperson]

Does anyone have any idea about what are the guesses for variant 34. Please share if anyone knows it.

 

[zain ul abidin]

anything for varient 34?

 

[princessnoor]

Oh please "dumb human" ask yr friend to give info about biology p34 variant tooo
ur help would b appreciated
Thanks

 

[princessnoor]

welcome =D just pray for me =)

Plz any guesses or help for 34 variant

 

[aaaamfa]

so r u 100% sure that enzymes is coming??
after doing our last pactical on food tests in april our teacher gave us an extra paper on enzymes reaction which had amylase thingy related ?
Any guesses??
It will be a GREAT help !!

I need help in the following question paper:
http://papers.xtremepapers.com/CIE/...nd AS Level/Biology (9700)/9700_w13_qp_35.pdf
In question # 2 b onwards

Need help urgently any explanation would be great favor

 

[sunstar]

so r u 100% sure that enzymes is coming??
after doing our last pactical on food tests in april our teacher gave us an extra paper on enzymes reaction which had amylase thingy related ?
Any guesses??
It will be a GREAT help !!

No, i just told what my teacher said so u better revise all other chapters as well

 

[sunstar]

Guys, I just wanted to ask if anyone could draw a plan diagram of how stomata look like in upper epidermis and that at lower epidermis as they appear on an imprint using nail varnish and microscope
This question is present in oct/nov 2006
Thnx in advance

 

[dumb human]

Oh please "dumb human" ask yr friend to give info about biology p34 variant tooo
ur help would b appreciated
Thanks

my school mates all gave 33 variant yaar...still i will try to search around =)

 

[happyperson]

my school mates all gave 33 variant yaar...still i will try to search around =)

Please search and tell us. Thanks

 

[princessnoor]

my school mates all gave 33 variant yaar...still i will try to search around =)

ok thanks

 

[Alex10]

Paper 32 will probably involve investigating the effect of something on the activity of an enzyme that coagulates milk.

 

[happyperson]

Paper 32 will probably involve investigating the effect of something on the activity of an enzyme that coagulates milk.

Any idea for paper 34. Please share.

 

[princessnoor]

Paper 32 will probably involve investigating the effect of something on the activity of an enzyme that coagulates milk.

when is the variant 32 paper date?

 

[redd]

Why are there two (V) parts and the second (V) part is not related to the experiment. please i need help with this. Cant figure out if it is related or not!

 

[DeViL gURl B)]

I am not sure about 32, But most probably u will have food test, because we didn't have that,
graph of course,
then these====>#MODIFICATION:-Use calorimeter(to find the end-point), Repeat more than once.
#RELIABLE RESULTS:-Repeat the experiment and calculate the Mean, Increase the range of Concentrations, Record the result in shorter intervals.
#ACCURACY:-Use Stopwatch, use Digital-Thermometer, use Calorimeter, use a temperature to control Water-bath.

well just go through past-papers of variant 32 you know.
if i come to know anything, i will surely tell you =)

So dude we should only practice of variant 32 or the others as well?
Plus of u've got any tips on plan diagram please share
And max how much pastpapers should be practiced?
Thank you