Qualification > Sciences

CHEM AND BIO HELP AND TIPS HERE

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Angel Of Love:
if you want for human insulin and genetic engineering( i mean both differently) then here they are..
i mean maybe for insulin you xcan go to this website it has picture as well as something ore if you like it:

http://www.vivo.colostate.edu/hbooks/pathphys/endocrine/pancreas/insulin_struct.html

for genetic engineering i have attached..

Vin:
@Angel of Love n nid404 congratulations!! :D

@nid404 thanku so much! i already figured that out in igcse complete chemistry pg 151..:P
jus logged on 2 see wat replies i'd get  :P :D

CatAly$t:
hi,

can somebody explain to me why antibiotics kills bacteria but not viruses??

it's in the syllabus....

holtadit:

--- Quote from: CatAly$t on May 02, 2010, 11:30:46 am ---hi,

can somebody explain to me why antibiotics kills bacteria but not viruses??

it's in the syllabus....

--- End quote ---

What antibiotics do is they prevent formation of bacterial cell wall, thus leading to their death
Antibiotics target only bacterial function and structure and so have no effect on virus'

By Nid

Saladin:

--- Quote from: Ari Ben Canaan on May 02, 2010, 11:43:22 am ---What antibiotics do is they prevent formation of bacterial cell wall, thus leading to their death
Antibiotics target only bacterial function and structure and so have no effect on virus'

By Nid

--- End quote ---

Whoah, you dont need to know that much, simple that they dont work on viruses, because virusesbacteria do not show the characteristics of viruses. You will not be asked this question though, in the CIE spec.

You will be given questions like why has penicillin becomes less effective??

Because strains of Bacteria become more resistant to it.

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