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April 18, 2026, 10:41:42 am
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Author Topic: Drawing DNA  (Read 2486 times)  Share 

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stonecold

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Re: Drawing DNA
« Reply #15 on: June 08, 2010, 05:04:57 pm »
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I think so too ken, they would never be able to mark it.  Even a nucleotide is pushing it.  I reckon they'll give is a drawn one with a few atoms missing that we have to fill in.

Like last years exam, but perhaps a few more missing/more difficult atoms to locate...
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chansthename

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Re: Drawing DNA
« Reply #16 on: June 08, 2010, 06:47:23 pm »
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stonecold

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Re: Drawing DNA
« Reply #17 on: June 08, 2010, 06:51:24 pm »
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yeah, that is right.  there was some practice exam where they drew the strands facing the same way.  fail!
they have to be anti parallel.
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mankay

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Re: Drawing DNA
« Reply #18 on: June 08, 2010, 08:47:22 pm »
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I'm still confused. Which direction should we show the P=O bond? To the left?
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stonecold

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Re: Drawing DNA
« Reply #19 on: June 08, 2010, 08:48:09 pm »
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^yeah, that's what I'm going with....
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scocliffe09

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Re: Drawing DNA
« Reply #20 on: June 08, 2010, 08:49:07 pm »
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Quote from: mankay on June 08, 2010, 08:47:22 pm
I'm still confused. Which direction should we show the P=O bond? To the left?
It shouldn't really matter because they're both right (it's actually more complex than just an O- and a P=O, a bit like benzene doesn't actually have double bonds)
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mankay

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Re: Drawing DNA
« Reply #21 on: June 08, 2010, 09:00:01 pm »
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Quote from: chansthename on June 08, 2010, 06:47:23 pm
http://upload.wikimedia.org/wikipedia/commons/e/e4/DNA_chemical_structure.svg

Looking at the right strand... i've tried to replicate the deoxyribose sugar but i cant... does that even match the databook? it look's like the O is in another position..
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chansthename

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Re: Drawing DNA
« Reply #22 on: June 09, 2010, 08:01:58 am »
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^^ I only picked this one for the 5' and 3' written in.

I am going to draw the P=O facing inwards so right for the left chain
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Edmund

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Re: Drawing DNA
« Reply #23 on: June 09, 2010, 09:47:08 am »
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Quote from: stonecold on June 08, 2010, 04:56:19 pm
http://www.vcbio.science.ru.nl/images/cellcycle/mdnasinglechain_zoom.gif

Is this correct people, because it's what I've learnt haha...
Yep

Quote from: mankay on June 08, 2010, 08:47:22 pm
I'm still confused. Which direction should we show the P=O bond? To the left?
Doesn't matter actually, follow the way it is drawn here: http://upload.wikimedia.org/wikipedia/commons/e/e4/DNA_chemical_structure.svg
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mankay

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Re: Drawing DNA
« Reply #24 on: June 09, 2010, 10:04:31 am »
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Quote from: Edmund on June 09, 2010, 09:47:08 am
Doesn't matter actually, follow the way it is drawn here: http://upload.wikimedia.org/wikipedia/commons/e/e4/DNA_chemical_structure.svg

What about the deoxyribose on the right strand? It looks completely different to the one in the databook?
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chansthename

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Re: Drawing DNA
« Reply #25 on: June 09, 2010, 10:42:46 am »
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^^ remember that it is rotated because of the double strand
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