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Caffeine

Caffeine

(Science: chemical) a xanthine derivative that elevates camp levels in cells by inhibiting phosphodiesterases. A bitter alkaloid found in coffee and tea that is responsible for their stimulating effects.Caffeine is a diuretic that stimulates the central nervous system, and can be found in cocoa beans.


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Home Work Question

Sue has heard that taking an over-the-counter ‘energy’ pill, which contains as much caffeine as a strong cup of coffee, makes people feel alert and ‘speedy’. She wonders if taking this pill will make a difference to the reaction times of people doing an online reaction ...

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by zak
Tue Dec 10, 2013 12:08 pm
 
Forum: General Discussion
Topic: Home Work Question
Replies: 12
Views: 4625

Explain why Genetic Code is called "Rosetta Stone" of life?

... of life. I realize that this response is a bit ackward due to poor word choice but I wrote it along with other tests the same day and was wired on caffeine. Do you agree that this response warrants a zero out of two marks?

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by baffled0s2dent
Wed May 30, 2012 11:08 pm
 
Forum: Genetics
Topic: Explain why Genetic Code is called "Rosetta Stone" of life?
Replies: 11
Views: 8981

How can I find out what version of CYP1A2 I have?

... the information soon. I think the SNP genotyping would also drop in price over the same timeframe.) 4. Finally, you could probably do some test of caffeine metabolism directly. I'm not sure how you might do this, but you could drink a defined amount of caffeine, wait for a defined time interval, ...

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by AstraSequi
Fri Feb 24, 2012 7:41 am
 
Forum: Genetics
Topic: How can I find out what version of CYP1A2 I have?
Replies: 1
Views: 2726

How can I find out what version of CYP1A2 I have?

... decreased risk of gout in men over age 40. Unfortunately, it also states that; Polymorphisms in the CYP1A2 gene may lead to a slower metabolism of caffeine. In patients with a slow version of the enzyme the risk for myocardial infarction (heart attack) is increased by a third (2–3 cups) to two ...

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by gstevenz
Fri Feb 24, 2012 12:30 am
 
Forum: Genetics
Topic: How can I find out what version of CYP1A2 I have?
Replies: 1
Views: 2726

Re: What are the limits of genetic engineering

... the more distantly related the organisms are, the harder it becomes to transfer a certain property? Not really. If you tried to produced e.g. caffeine in Arabidopsis, you would had to transfer all the genes involved, although it would be from one plant into other, but if you tried to express ...

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by JackBean
Thu Dec 15, 2011 11:42 am
 
Forum: Genetics
Topic: What are the limits of genetic engineering
Replies: 9
Views: 5948
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