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Author Topic: edexcel AS biology experiments  (Read 17428 times)

Offline T.Q

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edexcel AS biology experiments
« on: November 11, 2009, 09:34:32 pm »
 i need these experiments for the Edexcel AS Biology unit 1

1.Describe how the effect of caffeine on heart rate in Daphnia can be investigated practically, and discuss whether there are ethical issues in the use of invertebrates.

2.Describe how to investigate the vitamin C content of food and drink.

3.Describe how membrane structure can be investigated practically, eg by the effect of alcohol concentration or temperature on membrane permeability.

4.Describe how enzyme concentrations can affect the rates of reactions and how this can be investigated practically by measuring the initial rate of reaction.

plz anybody help
thanx in advance :)
« Last Edit: December 22, 2009, 07:37:39 pm by T.Q »
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Offline vanibharutham

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Re: i need these experiments in biology
« Reply #1 on: November 13, 2009, 12:19:11 pm »
have u carried out these experiments in school?
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Offline T.Q

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Re: i need these experiments in biology
« Reply #2 on: November 14, 2009, 11:53:44 am »
i have found the first experiment

help me with the others plz
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Offline T.Q

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Re: i need these experiments in biology
« Reply #3 on: December 22, 2009, 07:26:13 pm »
more expermints
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Offline T.Q

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Re: experiments biology
« Reply #4 on: December 22, 2009, 07:30:36 pm »
more expermints
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Offline T.Q

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Re: experiments biology
« Reply #5 on: December 22, 2009, 07:33:02 pm »
more expermints
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Offline T.Q

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Re: experiments biology
« Reply #6 on: December 22, 2009, 07:36:49 pm »
more expermints
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Offline T.Q

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Re: edexcel AS biology experiments
« Reply #7 on: December 22, 2009, 07:39:13 pm »
THANK YOU   Flufferz Rawrr

she is the one who sent me these expermints
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Offline XFlufferzX

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Re: edexcel AS biology experiments
« Reply #8 on: December 28, 2009, 11:04:12 am »
Anytime
Root tip squash experiment
« Last Edit: December 28, 2009, 02:04:46 pm by XFlufferzX »
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Offline Q80BOY

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Re: edexcel AS biology experiments
« Reply #9 on: January 08, 2010, 05:57:42 pm »
thanks loads!!  ;D
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Offline moon

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Re: edexcel AS biology experiments
« Reply #10 on: February 22, 2010, 12:41:24 pm »
please I need these experiment for edexcel A2 Biology

1. Describe how to carry out a study on the ecology of a habitat to produce valid and reliable data(including the use of quadrats and transects to assess abundance and distribution of organisms and the measurement of abiotic factors, eg solar energy input, climate, topography, oxygen avaliability and edaphic factors.

2. Describe how to investigate the effects of temperature on the development of organisms( eg seedling growth rate, brine shrimp hatch rates)

3. Describe how DNA can be amplified using the polymerase chain reaction(PCR).

4. Describe how gel electrophoresis can be used to separate DNA fragments of different length.

5. Describe how to investigate the effect of different antibiotics on bacteria.

6. Describe how to investigate rate of respiration practically.

7. Describe how to investigate the effects of excercise on tidal volume and breathing rate using data from spirometer traces.

8. Describe how to investigate habituation to a stimulus.

Thanks a lot.
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Offline MaNi_DaDuDe

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Re: edexcel AS biology experiments
« Reply #11 on: February 23, 2010, 04:12:30 pm »
hey thanks guys! :) (though im doing CIE)

Umm, there's a book I have.. it's called biology a level experiments.. i will try to find the e-version of it; (if there is one).

also, go to the biology links topic and look at the thinkwell vids, nice help.
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Offline Lana Wolf

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Re: edexcel AS biology experiments
« Reply #12 on: February 23, 2010, 06:35:31 pm »
Quote from: MaNi_DaDuDe on February 23, 2010, 04:12:30 pm
hey thanks guys! :) (though im doing CIE)

Umm, there's a book I have.. it's called biology a level experiments.. i will try to find the e-version of it; (if there is one).

also, go to the biology links topic and look at the thinkwell vids, nice help.

Hey... i was searching that for a frnd too..

I found one..

here's the link ... : http://www.scribd.com/doc/6468336/Teaching-AS-Biology-Practical-Skills

Go from down up.. there's lots of unnecessary instructions at the start...

But its not the one i had.. mine was different and better...  :-\ :-\ cant find it anywhere...
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Offline MaNi_DaDuDe

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Re: edexcel AS biology experiments
« Reply #13 on: February 24, 2010, 10:28:48 am »
Quote from: <3 ~~Lana Wolf~~ <3 on February 23, 2010, 06:35:31 pm
Hey... i was searching that for a frnd too..

I found one..

here's the link ... : http://www.scribd.com/doc/6468336/Teaching-AS-Biology-Practical-Skills

Go from down up.. there's lots of unnecessary instructions at the start...

But its not the one i had.. mine was different and better...  :-\ :-\ cant find it anywhere...

oh hey, this isn't bad.. thanks for the share! However, I have a black cover one and it's way way different/better. I'm still looking myself.. but hey guys try these:

http://www.practicalbiology.org - not bad.
e.g. http://www.practicalbiology.org/areas/introductory/cells-to-systems/microscopic-organisms/observing-protoctista-in-water-using-the-hanging-drop-technique,93,EXP.html

http://www.courseworkbank.co.uk/AS__A2_and_A-Level/Biology/
http://www.courseworkbank.co.uk/AS__A2_and_A-Level/Biology/Experiments/

pz
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Offline Lana Wolf

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Re: edexcel AS biology experiments
« Reply #14 on: February 25, 2010, 05:57:45 am »
Quote from: MaNi_DaDuDe on February 24, 2010, 10:28:48 am
oh hey, this isn't bad.. thanks for the share! However, I have a black cover one and it's way way different/better. I'm still looking myself.. but hey guys try these:

http://www.practicalbiology.org - not bad.
e.g. http://www.practicalbiology.org/areas/introductory/cells-to-systems/microscopic-organisms/observing-protoctista-in-water-using-the-hanging-drop-technique,93,EXP.html

http://www.courseworkbank.co.uk/AS__A2_and_A-Level/Biology/
http://www.courseworkbank.co.uk/AS__A2_and_A-Level/Biology/Experiments/

pz

I'd told you this one was different..
I wish i hadnt deleted all those files i had..   :-\ :-\
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