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Author Topic: Edexcel BIOLOGY Doubts!!!!  (Read 134811 times)

Offline Kim

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Re: Edexcel BIOLOGY Doubts!!!!
« Reply #45 on: May 16, 2010, 04:18:25 pm »
hey cud some one help me
cud sum 1 tell me how do u do q2d of the sample paper w2 for biology??please i reallly need to know
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Offline sunstar

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Re: Edexcel BIOLOGY Doubts!!!!
« Reply #46 on: May 16, 2010, 04:44:10 pm »
Quote from: kim on May 16, 2010, 04:18:25 pm
hey cud some one help me
cud sum 1 tell me how do u do q2d of the sample paper w2 for biology??please i reallly need to know

draw a range bar
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Offline Kim

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Re: Edexcel BIOLOGY Doubts!!!!
« Reply #47 on: May 16, 2010, 04:44:54 pm »
Quote from: sunstar on May 16, 2010, 04:44:10 pm
draw a range bar


alittle more detail please
cause i have no idea wat a range bar is
how do u draw it?
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Offline ksitna

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Re: Edexcel BIOLOGY Doubts!!!!
« Reply #48 on: May 16, 2010, 07:41:52 pm »
well u look at the range
the smallest number u will mark on the graph
then the largest number u will mark on the graph
u would have already marked the average
then u just draw a straight vertical line that crosses the point

u get it?
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Offline Kim

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Re: Edexcel BIOLOGY Doubts!!!!
« Reply #49 on: May 16, 2010, 07:46:11 pm »
ok for eg i mark 2 as the smallest and 4 as the largest then i draw a line through it???
awesome so it is just like an errror bar
thank you soooooooooo much
u are a life saver i was panicking cause i didnt know how to do it
yay thank u thank u thanku
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Offline ksitna

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Re: Edexcel BIOLOGY Doubts!!!!
« Reply #50 on: May 16, 2010, 07:49:06 pm »
hey yeah i think its the same as an error bar
not sure tho

correct me if im wrong

and heyy nno problem :)
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Offline solo_G

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Re: Edexcel BIOLOGY Doubts!!!!
« Reply #51 on: May 18, 2010, 12:36:32 am »
Quote from: ksitna on May 16, 2010, 07:49:06 pm
hey yeah i think its the same as an error bar
not sure tho

correct me if im wrong

and heyy nno problem :)
ummm just one Question....i calculated the mean 1.80 and made a bar graph of the overall mean so the range bar wen drawn wont pass through the mean is that okay?
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Offline ksitna

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Re: Edexcel BIOLOGY Doubts!!!!
« Reply #52 on: May 20, 2010, 10:55:23 am »
shouldnt it be a line graph?
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Offline Blizz_rb93

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Re: Edexcel BIOLOGY Doubts!!!!
« Reply #53 on: May 21, 2010, 06:45:53 pm »
Explain why many animals have a heart and circulation??

this is from the specification guide for biology edexcel
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Offline Blizz_rb93

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Re: Edexcel BIOLOGY Doubts!!!!
« Reply #54 on: May 22, 2010, 03:18:22 pm »
can someone plz answer asap
thank you
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Offline abuyusef

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Re: Edexcel BIOLOGY Doubts!!!!
« Reply #55 on: May 22, 2010, 04:47:30 pm »
Quote from: Psyclax on May 21, 2010, 06:45:53 pm
Explain why many animals have a heart and circulation??

this is from the specification guide for biology Edexcel
Dude ....
They do have a circulation because they are of relatively high activity .....and they have small Volume to surface area ratio..... Small rate of diffusion  so they need  circulation for effective delivery of nutrients and oxygen to all parts of the body and the heart "the pump" is for efficient blood pressure to reach all parts of the body and normal functioning of heart .
I think that's full answer....
Abuyusef
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Offline Kim

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Re: Edexcel BIOLOGY Doubts!!!!
« Reply #56 on: May 22, 2010, 05:30:30 pm »
hey i have a question
is the template strand called sense strand or anti sense strand???
urgent reply
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Offline Blizz_rb93

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Re: Edexcel BIOLOGY Doubts!!!!
« Reply #57 on: May 22, 2010, 05:42:48 pm »
i think it's both
the first strand is the sense strand and the second strand is the anti sense strand
The second strand is called the antisense strand because its sequence of nucleotides is the complement of message sense.

First strand aka Sense strand would be like this :

5' ... ATG GCC TGG ACT TCA ... 3'         

And the second strand aka Antisense strand should be like this:

3' ... TAC CGG CGG TGA AGT

im not 100% correct, correct me if im wrong.
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Offline Kim

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Re: Edexcel BIOLOGY Doubts!!!!
« Reply #58 on: May 22, 2010, 05:45:26 pm »
well the problem is in the syllabus it says the strand used for mrna synthesis is the anti sense strand and my teacher told me it was the sense strand so i dunno which one
but wat u r sayin is dat the anti sense strand has nucleotides complimentary to those in the sense strand?
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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 Blizz_rb93

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Re: Edexcel BIOLOGY Doubts!!!!
« Reply #59 on: May 22, 2010, 06:02:27 pm »
Quote from: kim on May 22, 2010, 05:45:26 pm
well the problem is in the syllabus it says the strand used for mrna synthesis is the anti sense strand and my teacher told me it was the sense strand so i dunno which one
but wat u r sayin is dat the anti sense strand has nucleotides complimentary to those in the sense strand?
i guess so lol but im not sure
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