Qualification > Sciences

Biology Paper 1

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tensed123:
Q. In an animal cell which process is dependent upon cell surface area  and which process is dependent upon cell volume ?

mcq number 24 , june 2007 .. help me out
                           

unknown 101:

--- Quote from: tensed123 on May 21, 2010, 10:44:32 pm ---Q. In an animal cell which process is dependent upon cell surface area  and which process is dependent upon cell volume ?

mcq number 24 , june 2007 .. help me out
                           

--- End quote ---

answer is C
hormones are the only ones dependant because if the surface area is larger then more receptors will be able to identify the hormone
all the others have nothing to do with surface area, carbon dioxide is dependant of cell volume because if its larger then more cell organelles are present so more respiration occurs!

hope this helped.. :)

unknown 101:
Q 21, jun 07

why is it 20 ??? ??? ???

3ishakay:

--- Quote from: unknown 101 on May 21, 2010, 11:39:11 pm ---Q 21, jun 07

why is it 20 ??? ??? ???

--- End quote ---

hey, its like

a double stranded DNAs got 120 nucleotides ..

its askin fr the max length of the poly peptide chain

so first the mRNA only uses the 60 nucleotides as the template
cus it wont use both strands ..

and then 60/3 = 20 ..

i hope i made sens ..
im horribl at explainin things ..

unknown 101:

--- Quote from: 3ishakay on May 22, 2010, 04:42:57 pm ---hey, its like

a double stranded DNAs got 120 nucleotides ..

its askin fr the max length of the poly peptide chain

so first the mRNA only uses the 60 nucleotides as the template
cus it wont use both strands ..

and then 60/3 = 20 ..

i hope i made sens ..
im horribl at explainin things ..

--- End quote ---

i know the first part about 60 nucleotides, but why do u divide it by 3?
and Thanks anyways ;)

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