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Edexcel BIOLOGY Doubts!!!!

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hissyfit:
Can anybody help me with SAQ12(a) ,I can t find the mark scheme...
It s the qs for Practical 4
thanks

Amelia:
SAQ 12 The graph below shows the results of an investigation into the effect of substrate concentration on the initial rate of enzyme controlled reaction.

a) Suggest two conditions apart from temperature that should be kept constant in this investigation.

pH and substrate concentration.

hissyfit:
thanks + rep,to my own surprise I was thinking the same as you (I m not the best  bio student there is)
 how would you keep pH constant?

Deadly_king:

--- Quote from: hissyfit on February 24, 2011, 09:22:32 pm ---thanks + rep,to my own surprise I was thinking the same as you (I m not the best  bio student there is)
 how would you keep pH constant?

--- End quote ---

pH is kept constant by using a buffer.

In biology, you don't really need to know what a buffer is made up of. However you'll study them in Chemistry. ;)

Here you are :)

hissyfit:
ahhhh,I see a little bit complicated for me but I think I get the main function...

Thanks :D

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