Discussion in 'International A And AS Level' started by XPFMember, Sep 29, 2011.
I think that you're right.
I wrote the same
unfortunately i think i haven't understood the question too well...so no i haven't wrote that point but i wrote about osmosis and other stuff to try and increase my chances of meeting valid answers in the MS.
My answer was that the thing prevented the translation from happening....guys it said it was on the start codon so how can translation happen if the start codon isnt available?
Oh i just said its longer lasting/life and used for treatment against cancer/tumour
I wrote that the small molecule had a STOP codon so the polypeptide is not synthesised as the STOP codon is encountered before the START codon...is it right?
I wrote that it marks the antigen so it is easier for the macrophage to identify and destroy it
what do u guys think about the threshold?!
and what was the answer for the question with different pathogenic strains
Maybe around 40
Which question are u talking about?
the one with immunity
We had to mention about specificity of memory B and T cells and about the different shapes of antigens
i forgot to mention about memory cells but mentioned about the specificity of antibodies to antigens. How much marks will i lose?!
there was also a question about the features of channel protien
what did u write in the question
1 I think
I wrote about amino acids with hydrophobic R groups facing the hydrophobic fatty acid chains so they can interact for stability and the lining of the inside with hydrophilic R groups to allow the entry and interaction with polar molecules
lt also mentioned about the total number of polypeptide chain it contains. Is it necessary to tell about quatenary structure
I don't know whether mentioning about the quaternary structure was mandatory or not...but I think that the question was to state and explain so the answer which I told u would be sufficient for 4 marks...what do u say?
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