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Author Topic: Edexcel BIOLOGY Doubts!!!!  (Read 121296 times)

Offline Kim

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Re: Edexcel BIOLOGY Doubts!!!!
« Reply #165 on: June 07, 2010, 09:30:41 pm »
Quote from: Ibiza279 on June 07, 2010, 09:27:40 pm
i need help with gene expression and differentiation :( n also, im confused in learning the mitosis stages, can anyone give me an easier method :| sovvy fer the botherrrr :3

wat exactly do u need help in gene expression and differentiation?
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Offline ksitna

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Re: Edexcel BIOLOGY Doubts!!!!
« Reply #166 on: June 07, 2010, 09:30:56 pm »
THANKS :D
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Offline Kim

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Re: Edexcel BIOLOGY Doubts!!!!
« Reply #167 on: June 07, 2010, 09:32:34 pm »
Quote from: ksitna on June 07, 2010, 09:30:56 pm
THANKS :D

haha no prob i am glad i cud help
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By the time a man realizes that maybe his father was right, he usually has a son who thinks he’s wrong.

The early bird may get the worm, but the second mouse gets the cheese.

Offline Ibiza279

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Re: Edexcel BIOLOGY Doubts!!!!
« Reply #168 on: June 07, 2010, 09:34:45 pm »
wat about me kimmy :( ?

n lol i was on the MAOA page but after ur summarised it, i don't need to read it n i got it better with ur explanation too :) Thanks :) JazakAllah
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Offline Kim

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Re: Edexcel BIOLOGY Doubts!!!!
« Reply #169 on: June 07, 2010, 09:36:52 pm »
Quote from: Ibiza279 on June 07, 2010, 09:34:45 pm
wat about me kimmy :( ?

n lol i was on the MAOA page but after ur summarised it, i don't need to read it n i got it better with ur explanation too :) Thanks :) JazakAllah

hahaha dont worry
i havent forgotten ya
thank you
well for mitosis i am afraid there is no easy u will have to learn it
but i will type my notes out for ya maybe they will help
for the gene expression cud u be a little more specific??
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The early bird may get the worm, but the second mouse gets the cheese.

Offline Ibiza279

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Re: Edexcel BIOLOGY Doubts!!!!
« Reply #170 on: June 07, 2010, 09:37:31 pm »
Quote from: kim on June 07, 2010, 09:28:54 pm
ok welll
MAOA is monoamine oxidase A
it break downs nuero transmitter such as serotonin and dopamine
if the level of MAOA is raised or decreased it causes mutations
low levels -nervous disorder
dependance on alcohol
parkinsons disease

high levels-risk takin and aggressive behavior
tension favors high release of MAOA
and maltreatment causes low release
this enzyme is produced with the help of a dominate gene located on the X chromosome

if there is to much of this enzyme it breaks down too many of the nuerotransmitters which can affect ur mood
hence it is linked with depression


but i remember MAOA being majorly in males so shouldnt it b on the Y chromosome ? :o i could b wrong
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Offline Kim

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Re: Edexcel BIOLOGY Doubts!!!!
« Reply #171 on: June 07, 2010, 09:43:21 pm »
Quote from: Ibiza279 on June 07, 2010, 09:37:31 pm
but i remember MAOA being majorly in males so shouldnt it b on the Y chromosome ? :o i could b wrong

haha i just checked it is on the X chromosome
so girls have double the chance of getting it
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After all is said and done, more is said than done.

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The early bird may get the worm, but the second mouse gets the cheese.

Offline Ibiza279

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Re: Edexcel BIOLOGY Doubts!!!!
« Reply #172 on: June 07, 2010, 09:43:50 pm »
Quote from: kim on June 07, 2010, 09:36:52 pm
hahaha dont worry
i havent forgotten ya
thank you
well for mitosis i am afraid there is no easy u will have to learn it
but i will type my notes out for ya maybe they will help
for the gene expression cud u be a little more specific??

well i did one of the papers and there was a question regarding gene differentiation. when i checked the mark scheme, they gave the points as for example, a stem cell in a particular part of the body requires production of ATP for instance. so a few of the genes which aid in ATP synthesis are EnViRnoMeNtAlLy activated. these cause the specific protein to b synthesized and so it changes it state of pluripotency and forms a speciallised cell. i read this a long time ago so my explanation is abit vague,

as fer the others, don't actually read my explanation unless u can explain it to me :P cause it mite give the wrong idea so plz, i don't wanna b the reason if such a question comes up n my explanation which U hav memorized, goes wrong :(
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live life like you'll never die but don't die like you never lived but then again its a saying n i don't believe in saying much so jus forget it . . .

Offline Ibiza279

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Re: Edexcel BIOLOGY Doubts!!!!
« Reply #173 on: June 07, 2010, 09:45:21 pm »
Quote from: kim on June 07, 2010, 09:43:21 pm
haha i just checked it is on the X chromosome
so girls have double the chance of getting it

who are the greatest criminals ? MEN, who are the ones who normally commit murders ? MEN, wats PRISON BREAK about ? mostly MEN :o :P but if the book says women then its alrite, the media tends to show things differently :P
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live life like you'll never die but don't die like you never lived but then again its a saying n i don't believe in saying much so jus forget it . . .

Offline Kim

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Re: Edexcel BIOLOGY Doubts!!!!
« Reply #174 on: June 07, 2010, 09:48:19 pm »
haha ok i will get to that
mwahahaha i got lazy so i scanned my ntbk
hehe hopefully u can read my notes
if u cant do tell
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The early bird may get the worm, but the second mouse gets the cheese.

Offline ksitna

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Re: Edexcel BIOLOGY Doubts!!!!
« Reply #175 on: June 07, 2010, 09:55:18 pm »
nice handwriting  ;D
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Offline Kim

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Re: Edexcel BIOLOGY Doubts!!!!
« Reply #176 on: June 07, 2010, 09:57:19 pm »
Quote from: Ibiza279 on June 07, 2010, 09:43:50 pm
well i did one of the papers and there was a question regarding gene differentiation. when i checked the mark scheme, they gave the points as for example, a stem cell in a particular part of the body requires production of ATP for instance. so a few of the genes which aid in ATP synthesis are EnViRnoMeNtAlLy activated. these cause the specific protein to b synthesized and so it changes it state of pluripotency and forms a speciallised cell. i read this a long time ago so my explanation is abit vague,

as fer the others, don't actually read my explanation unless u can explain it to me :P cause it mite give the wrong idea so plz, i don't wanna b the reason if such a question comes up n my explanation which U hav memorized, goes wrong :(

um.............sorry to say cant help
cause i dont think i have anything like this
could some one else answer this please?????
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After all is said and done, more is said than done.

By the time a man realizes that maybe his father was right, he usually has a son who thinks he’s wrong.

The early bird may get the worm, but the second mouse gets the cheese.

Offline Kim

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Re: Edexcel BIOLOGY Doubts!!!!
« Reply #177 on: June 07, 2010, 09:58:09 pm »
Quote from: ksitna on June 07, 2010, 09:55:18 pm
nice handwriting  ;D

haha really??
thanks
By the way can u answer ibiza doubt??
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After all is said and done, more is said than done.

By the time a man realizes that maybe his father was right, he usually has a son who thinks he’s wrong.

The early bird may get the worm, but the second mouse gets the cheese.

Offline Ibiza279

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Re: Edexcel BIOLOGY Doubts!!!!
« Reply #178 on: June 07, 2010, 09:59:43 pm »
wooowwwww, neat handwritting MashAllah, mines all huge and joined up and dirty and unordered and unorganised n u name it :3

n Thanks :) !
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live life like you'll never die but don't die like you never lived but then again its a saying n i don't believe in saying much so jus forget it . . .

Offline Kim

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Re: Edexcel BIOLOGY Doubts!!!!
« Reply #179 on: June 07, 2010, 10:00:43 pm »
Quote from: Ibiza279 on June 07, 2010, 09:59:43 pm
wooowwwww, neat handwritting MashAllah, mines all huge and joined up and dirty and unordered and unorganised n u name it :3

n Thanks :) !


thanks
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After all is said and done, more is said than done.

By the time a man realizes that maybe his father was right, he usually has a son who thinks he’s wrong.

The early bird may get the worm, but the second mouse gets the cheese.
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