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Author Topic: CHEM AND BIO HELP AND TIPS HERE  (Read 354310 times)

Offline thenewkid™

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1695 on: May 23, 2010, 06:30:05 pm »
is this important
USING GENETIC ENGINEERING TO PUT HUMAN INSULIN GENES INTO BACTERIA
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Offline Dana

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1696 on: May 23, 2010, 06:30:33 pm »
In M/J 09 qs 4)d) Describe how you can find the dry mass of the radish plants. I said place in an oven and heat on medium temperature. The mark scheme just said leave them to dry. Is mine wrong or are both methods correct?
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Offline thenewkid™

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1697 on: May 23, 2010, 06:33:50 pm »
r we allowed to write anything on the blank pages at the end of the paper ??? :-\
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nid404

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1698 on: May 23, 2010, 06:34:44 pm »
Quote from: thenewkid™ on May 23, 2010, 06:30:05 pm
is this important
USING GENETIC ENGINEERING TO PUT HUMAN INSULIN GENES INTO BACTERIA


VERY IMPORTANT

http://www.bbc.co.uk/schools/gcsebitesize/science/add_gateway/living/genesrev3.shtml

Restriction endonuclease is used to cut the gene and DNA ligase is used to join the fragments

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Offline CatAly$t

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1699 on: May 23, 2010, 06:45:31 pm »
is it true that things that didnt came in p6 will come in p3???like reproduction,plant parts and etc...

am i against the sf rules? :-X
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Offline ambitious94

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1700 on: May 23, 2010, 06:48:42 pm »
Quote from: Dana on May 23, 2010, 06:30:33 pm
In M/J 09 qs 4)d) Describe how you can find the dry mass of the radish plants. I said place in an oven and heat on medium temperature. The mark scheme just said leave them to dry. Is mine wrong or are both methods correct?
umm....well wat the MS says is usually wat they want. But alternative approaches are also excepted. I feel it wud have been better if u'd have mentioned that we burn it n then measure the dry mass, that's more accurate.
But if we have to use the same radish plant or apparatus (i any general experiment) later in the experiment, then u can't burn it, so u just dry it.
That's what I think at least. My teacher told me burning is the best method to find the dry mass....but not BAKING! XD just kidding
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Offline Kim

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1701 on: May 23, 2010, 06:53:55 pm »
Quote from: ambitious94 on May 23, 2010, 06:52:06 pm
What's AVP? Any idea anyone?

could u tell where u saw it?
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Offline thenewkid™

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1702 on: May 23, 2010, 06:57:00 pm »
Quote
What's AVP? Any idea anyone?
alien versus predator ;D
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Offline ambitious94

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1703 on: May 23, 2010, 07:01:09 pm »
Quote from: kim on May 23, 2010, 06:53:55 pm
could u tell where u saw it?
LOL....I guess the pressure is gettin to me.....it means 'ANY VALID POINT'....loooooooooooooool
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Offline thenewkid™

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1704 on: May 23, 2010, 07:03:34 pm »
Quote from: ambitious94 on May 23, 2010, 07:01:09 pm
LOL....I guess the pressure is gettin to me.....it means 'ANY VALID POINT'....loooooooooooooool
where is it written?
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Offline SoONa

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1705 on: May 23, 2010, 07:04:37 pm »
Quote from: ambitious94 on May 23, 2010, 06:15:09 pm
As far as I know, and I'd appreciate if people would add to it:
The virus attacks the lymphocytes, which act as host cells for these viruses, and replicates its DNA into the nucleas of the lymphocytes, so that they are unable to produce antibodies. In this way these cells are unable to produce an immune response, and so the antibody production part of the immune system is 'deactivated'.


HIV virus attacks some types of white blood cells (lymphocytes) in the bloodstream, which produce antibodies to kill the antigens (microbes). some lymphocytes are stored in lymph nodes to provide protection against future infection. HIV prevents this immunity being retained, so AIDS surer has no protection against diseases such as tuberculosis (TB) and pneumonia.
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Offline dodi23

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1706 on: May 23, 2010, 07:06:23 pm »
heyy u copied tht fromthe study guide rite??
Thanks nyways!!
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Offline SoONa

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1707 on: May 23, 2010, 07:08:26 pm »
Hahaaa ofcoarse i did my study guides awsome written by Dr, Mohammed afzal ..lol was i suppose 2 say tht with wht i wrote opps sorry i thought it was quite obvious
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Offline dodi23

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1708 on: May 23, 2010, 07:09:12 pm »
loool ;)
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Offline guMnam

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1709 on: May 23, 2010, 07:12:02 pm »
can som1 plz explain me the diff between continous and discontinous variations ???
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