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Author Topic: What are the pi and sigma bond structures in benzene and other organics?  (Read 17728 times)

Offline Chemistry4me

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Argh! Please turn your biology radar to full throttle because mine's broken.
 

Offline Variola

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Yeah? Can you help me with RNA transcription? Or is that DNA? :)

Its kind of a bit of both!!!! What would you like to know??
 

Offline Variola

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Argh! Please turn your biology radar to full throttle because mine's broken.

Only if you sit my Chem Tech exam for me!!!
 

Offline Chemistry4me

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What's an Okazaki Ozaki fragment?

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And if you can't be bothered answering I don't care. I don't have a biology exam coming up.  :)

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But if you do, let me know. :)
« Last Edit: 03/06/2009 10:48:22 by Chemistry4me »
 

Offline Chemistry4me

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Um, your post disappeared. If that isn't stating the obvious.
 

Offline Variola

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Lol im doing my genetics work at the moment :)

Ok briefly, DNA has to be synthesized from 5' to 3' direction. Thats fine for the leading strang, but the complimentary lagging strand runs in the opposite 3' to 5' direction. The polymerase can't run continously in that direction.So its made in chunks, called Ozaki fragments, that are 'stitched' together with DNA ligase.

I've got a video on my youtube favorites which is quite good for explaining it.

http://www.youtube.com/watch?v=teV62zrm2P0

 :)

 

Offline Variola

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Um, your post disappeared. If that isn't stating the obvious.

Thats because the Tesco man called with my shopping and interrupted me....I closed my laptop down and it posted it without me finishing what I was typing!!
 

Offline Chemistry4me

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It's Okazaki! So that's why I couldn't find it on Google! Duh! :D
Thanks for the video.
 

Offline Variola

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Just realised I made the same spelling mistake in my post... lol it's catching!!
 

Offline Chemistry4me

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You could almost say it's spreading as fast as the swine flu.
Ah, I'm going loony. Time for bed.
 

Offline omid

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my monster tutor wants some accurate information because its going to be my last chance of submitting the draft.
so are you sure that the the link i m thinking of using is fine because he has confused me so much that i can not decide what to write and what to leave.
 

Offline Variola

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my monster tutor wants some accurate information because its going to be my last chance of submitting the draft.
so are you sure that the the link i m thinking of using is fine because he has confused me so much that i can not decide what to write and what to leave.

Well the information in is is accurate but it isn't explained that well.If it is confusing you, then definatley look for some different links, there are better ones than that.

If I had to answer the question, I would structure is as this

-Give a brief outline of what homeostasis is, and how the body uses homeostatic mechanisms to regulate itsef. Mention that for homeostasis to work you need a receptor, a control center, and an effector. Receptor to sense the change in homeostasis,an effector to do something about the change, a control centre to manage the signals coming in from the receptor and the effector.

-Go into greater detail about one specific negative feedback loop. If you type something into google, like glucose metabolism, blood pressure controls or the menstrual cycle, they are all negative feedback loops. Note down ( or draw) how they work, then put it into the essay. I prefer glucose metabolism as its the easiest to understand ( for me) but you might prefer to do something different. Sometimses just drawing out the diagram for yourself can make it easier to understand

The word negative is a bit misleading, as it seems to imply something is always decreasing. Balances of various hormones do decrease but then others are raised in conjunction with it, so when one level goes down, it is sensed and another level of something is increased.
 

Offline omid

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Offline Variola

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how about the link below;
http://www.biology-online.org/4/3_blood_sugar.htm

Thats ok but it doesn't go into that much detail, you might need to put a bit more detail in to satisfy your tutor.
Google the hormone names etc to get some more detail.
 

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