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Author Topic: Biology CIE  (Read 2445 times)

Offline *Hope*

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Biology CIE
« on: April 18, 2010, 06:23:17 am »
Hey guys!!
I was wondering if anybody knows what is meant by partial denaturing of enzymes??
there are some answers in the mark scheme that include these answers and it seems I can't find it in the syllabus.
So if anybody knows it, I will be thankful :D
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Offline *Hope*

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Re: Biology CIE
« Reply #1 on: April 19, 2010, 04:45:03 am »
please anybody??
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nid404

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Re: Biology CIE
« Reply #2 on: April 19, 2010, 06:41:09 am »
AS or A2
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Offline *Hope*

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Re: Biology CIE
« Reply #3 on: April 19, 2010, 09:22:36 am »
oh As level
srry forgot to mention
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Age is an issue of mind over matter. If you don't mind, it doesn't matter
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Amr Fouad

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Re: Biology CIE
« Reply #4 on: April 19, 2010, 09:27:51 am »
Quote from: lolo93 on April 18, 2010, 06:23:17 am
Hey guys!!
I was wondering if anybody knows what is meant by partial denaturing of enzymes??
there are some answers in the mark scheme that include these answers and it seems I can't find it in the syllabus.
So if anybody knows it, I will be thankful :D

http://www.s-cool.co.uk/alevel/biology/biological-molecules-and-enzymes/enzymes.html
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Offline MaNi_DaDuDe

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Re: Biology CIE
« Reply #5 on: April 19, 2010, 12:36:14 pm »
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Offline *Hope*

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Re: Biology CIE
« Reply #6 on: April 20, 2010, 04:03:27 am »
Guys am also confused about the chromatids, chromosomes and the number of DNA molecules present
Also do u have any idea of what are histones and if they are in the syllabus?? ???
« Last Edit: April 20, 2010, 05:22:01 am by lolo93 »
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O Allah grant us all the Jannah
Age is an issue of mind over matter. If you don't mind, it doesn't matter
Success is that old ABC ability,breaks,and courage
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nid404

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Re: Biology CIE
« Reply #7 on: April 20, 2010, 07:08:45 am »
we don't have histones in the syllabus....but just for ur knowledge, remember the DNA wind itself around proteins called histones...

2 strands of DNA make a chromosome....1 Strand of DNA is a chromatid

clear?
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Offline *Hope*

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Re: Biology CIE
« Reply #8 on: April 20, 2010, 07:38:57 am »
but isn't a chromatid a chromsome?
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nid404

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Re: Biology CIE
« Reply #9 on: April 20, 2010, 07:44:26 am »
Quote from: lolo93 on April 20, 2010, 07:38:57 am
but isn't a chromatid a chromsome?

2 chromatids make one chromosome

1 chromatid is 1 DNA strand wound on a histone
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Offline *Hope*

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Re: Biology CIE
« Reply #10 on: April 20, 2010, 07:47:51 am »
ok can u check nov06 p1 q19 and explain
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Age is an issue of mind over matter. If you don't mind, it doesn't matter
Success is that old ABC ability,breaks,and courage
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As long as I have faith in Allah,nothing else matters insA <3
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nid404

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Re: Biology CIE
« Reply #11 on: April 20, 2010, 07:55:53 am »
yaa well

8 chromosomes= 16 chromatids(or 16 strands of DNA)
At the end of interphase, this value doubles....cuz replication take place in Synthesis phase of interphase...
so from 8 chromosomes, there will be 16...and so from 16 chromatids it will double to 32
But yet again the catch here is the no of DNA molecules(1 molecules has 2 strands of DNA), so what they intend to ask is for the no of chromosomes, not chromatids....
which is 16
Hence C
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Offline Saladin

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Re: Biology CIE
« Reply #12 on: April 20, 2010, 08:01:28 am »
Quote from: nid404 on April 20, 2010, 07:08:45 am
clear?

Why do Indians always choose to use that word??
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nid404

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Re: Biology CIE
« Reply #13 on: April 20, 2010, 08:03:44 am »
Quote from: The Original Dude 321 on April 20, 2010, 08:01:28 am
Why do Indians always choose to use that word??

patent :P
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Offline *Hope*

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Re: Biology CIE
« Reply #14 on: April 20, 2010, 08:21:06 am »
ok Thanks
+rep
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O Allah grant us all the Jannah
Age is an issue of mind over matter. If you don't mind, it doesn't matter
Success is that old ABC ability,breaks,and courage
While there's life,there's Hope ;)
As long as I have faith in Allah,nothing else matters insA <3
Keep on forgetting to forget about you <3
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