BIOLOGY practicals help

[Emily793]

Any one needing help on biology practicals just post your doubts ill help you! :wink:

 

[AAestar]

How to draw a plan plant cell diagram? Any examples for that?

 

[Emily793]

what type of plant cell?
you should NOT include details when asked for a plan diagram details for example are individual cells such as pallisade cells or organelles.

 

[lychee26]

how can i prepare for bio practical? its on 20th of oct.

 

[Emily793]

revise dilutions this is most likely to be the question set.
check food tests
and revise plant cells diagrams, labellings and some functions such as that of vascular bundle.
check out veins, arteries and capilaralries too.
know that H2O2 is decomposed by catalase to give oxygen, that sucrose can be tested usng benedicts solution provided you add sodium caronate and acid before, these can be handy.
know what affects rate of transpiration in plants.
and know paracticals improvements such as keeping ph or temperature constant. using burette instead of syringe and so on.

 

[anoojfreak]

can somebody post question as soon as the finish their exam..I will be greatful plz help !!!

 

[Emily793]

me 2 would like to know the ques! thnx

 

[lychee26]

what is the difference between low power diagram and high power diagram?

 

[unknown2011]

Guys how do you do this question?
how do you count the divisions, the marking scheme does not make any sense to me. Please solve it..

It's question number 2 in both 31/32 oct/nov 2008 paper

http://www.xtremepapers.com/CIE/Interna ... _qp_31.pdf
http://www.xtremepapers.com/CIE/Interna ... _qp_32.pdf

Thanks in advance

 

[eyamwir]

can somebody post question as soon as the finish their exam..I will be greatful plz help !!!

well we cant post anything until its 24 hrs after exam remember?

 

[eyamwir]

may i know how to score an A in bio practical? like what tips and what warnings to becareful of etc etc

 

[eyamwir]

how do you draw table for june2011/32 qs 1 part b (ii) im a bit confused with the marking scheme

http://www.xtremepapers.com/CIE/Interna ... _qp_32.pdf

 

[eyamwir]

oh and how do you control an experiment? generally. in any experiment.

 

[AAestar]

oh and how do you control an experiment? generally. in any experiment.

The control for enzyme related experiment is not to involve enzyme in the experiment.

 

[Emily793]

yes youre right!

 

[eyamwir]

what about how to record the observation on tables? im a bit confused to record what and what.

 

[Emily793]

first record your experiment number or the labelling on your testube.
then your independent variable then your dependent variable if its time no harm is done in calclating rate too!

 

[XPFMember]

Assalamoalaikum!!

can somebody post question as soon as the finish their exam..I will be greatful plz help !!!

well we cant post anything until its 24 hrs after exam remember?

true..!!

Any attempt to gain the access to the paper is against the forum 'rules'.

There's no point in cheating anyways! Prepare your best, and leave the rest to Allah!

Good Luck!!

 

[makaveli]

practical 4 - Investigation of the carbohydratess metabloised by yeast...
evalution points:
1-why should the tubes remain still after the intial mixing?
2-what is being mesured by the methylene blue discoloration?
3- why some sugars are metabolised and others are not
4-why was the yeast incubated for 30 min before experiment started?
5-what was the purpose of the tube with distilled water and yeast solution?

 

[Emily793]

this is usually what should be done! i couldnt view the ms :sorry: