Qualification > Sciences
ALL CIE BIOLOGY DOUBTS HERE !!!
astarmathsandphysics:
Add the uncertainties at either end. For instance, if your ruler measures to the nearest mm, that is +-0.5mm at either end so 1mm is the uncertainty and the meaurement is +-1mm
WARRIOR:
Guys is this right , in the codons ,
A can be U or T or C
T can be A or G
C can be C or G
G can be T or C
Another question
There was a question in p1 that says we need only 8 essential amino acids , which chapter does it state that?
Amelia:
--- Quote from: Kimo Jesus on October 14, 2011, 07:14:40 pm ---Guys is this right , in the codons ,
A can be U or T or C
T can be A or G
C can be C or G
G can be T or C
--- End quote ---
I didn't quite understand what you mean by this question. But, during pairing of the DNA...
A binds with T and
C binds with G
in RNA the 'T' is replaced by 'U'.
--- Quote ---Another question
There was a question in p1 that says we need only 8 essential amino acids , which chapter does it state that?
--- End quote ---
I guess, that statement was based on the question itself. There are 20 amino acids we know about, not 8.
silvercameron:
can anyone pls give a description how starch/tile test is carried out??=S.i know about starch test using iodine solution and all but how is it carried out using a tile?and also,in case you get the wrong idea,it isnt about putting a leaf on tile and testing it.
my teacher told us all to get it tomorrow and i have no idea what it is.
Hope i get the answer soon.thanks!
Deadly_king:
--- Quote from: silvercameron on October 15, 2011, 07:58:58 pm ---can anyone pls give a description how starch/tile test is carried out??=S.i know about starch test using iodine solution and all but how is it carried out using a tile?and also,in case you get the wrong idea,it isnt about putting a leaf on tile and testing it.
my teacher told us all to get it tomorrow and i have no idea what it is.
Hope i get the answer soon.thanks!
--- End quote ---
Here you are, it explains it well ;)
http://www.footprints-science.co.uk/Starch.htm
Understand it first, then put it in your own words ;)
COnfirmation : http://www.practicalbiology.org/areas/introductory/energy/photosynthesis/testing-leaves-for-starch-the-technique,73,EXP.html
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