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Author Topic: CHEM AND BIO HELP AND TIPS HERE  (Read 333235 times)

Offline K_M

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1590 on: May 23, 2010, 03:02:05 pm »
Can someone tell me what we need to know about the brain?
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Offline Burhan.arshad

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1591 on: May 23, 2010, 03:03:17 pm »
any any one explain
QA7(c)   paper=M/J 07
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Offline Ghost Of Highbury

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1592 on: May 23, 2010, 03:04:06 pm »
Quote from: Burhan.arshad on May 23, 2010, 03:03:17 pm
any any one explain
QA7(c)   paper=M/J 07

bio/chem?
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Offline Burhan.arshad

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1593 on: May 23, 2010, 03:07:09 pm »
Quote from: A@di on May 23, 2010, 03:04:06 pm
bio/chem?

chem....and also please explain B11(d) of same paper
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Offline Ghost Of Highbury

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1594 on: May 23, 2010, 03:09:26 pm »
link please? what A and B are u talking about??
« Last Edit: May 23, 2010, 03:14:49 pm by A@di »
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Offline Raywin

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1595 on: May 23, 2010, 03:11:42 pm »
Quote from: K_M on May 23, 2010, 03:02:05 pm
Can someone tell me what we need to know about the brain?

Well, you need to know the main parts of the brain and its functions.

- Cerebrum (fore brain)  => Coordination between organs, control over voluntary actions and sensation    
- Cerebellum (Hind brain) => Balance and instincts
- Medulla (Hind brain) => Joins brain to spinal cord and controls unconscious activities like heartbeats, breathing and peristalsis.
- Hypothalamus - (Fore brain) => Monitors changes in the body
- Pituitary gland (fore brain) => Manufactures hormones and releases them into the blood, Growth and development, coordination and it is instructed by the Hypothalamus.

I think this is all u need to know.. :)
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Offline ambitious94

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1596 on: May 23, 2010, 03:17:18 pm »
I always get confused with mutation and inheritance when it comes to Sickle Cell Anaemia and Down's Syndrome.
In Sickle Cell Anaemia, do u INHERIT the faulty gene? Or does the normal haemoglobin gene undergo mutation? Or is it mutated while inheritance?

Can someone simplify the concept of these two conditions please?
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Offline Moonlyte

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1597 on: May 23, 2010, 03:18:49 pm »
Could someone please help me with the following question:

BIO P3:

1) nov 2007 no. 4c
2) jun 2007 no. 4ii (diff between source and sink?)
3) jun 2006 no. 5c
4) nov 2005 no. 6c
5) quorn vs. mycoprotein...which one is produced by bacteria and which one's produced by fungus?

Sorry for all my question!
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Offline Raywin

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1598 on: May 23, 2010, 03:20:37 pm »
Quote from: ambitious94 on May 23, 2010, 03:17:18 pm
I always get confused with mutation and inheritance when it comes to Sickle Cell Anaemia and Down's Syndrome.
In Sickle Cell Anaemia, do u INHERIT the faulty gene? Or does the normal haemoglobin gene undergo mutation? Or is it mutated while inheritance?

Can someone simplify the concept of these two conditions please?


Well, sickel cell anaemia is a faulty allele tht is present in ppl.. and it is inherited. And downs syndrome usually happens in older women. instead of the usual 23 pairs, 24 are made and after fertilization, the zygote gets 47. Um... yeah.. :P    
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Offline Moonlyte

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1599 on: May 23, 2010, 03:20:58 pm »
Quote from: ambitious94 on May 23, 2010, 03:17:18 pm
I always get confused with mutation and inheritance when it comes to Sickle Cell Anaemia and Down's Syndrome.
In Sickle Cell Anaemia, do u INHERIT the faulty gene? Or does the normal haemoglobin gene undergo mutation? Or is it mutated while inheritance?

Can someone simplify the concept of these two conditions please?


sickle cell anemia is a gene mutaion and you can inherit it.
down's syndrome is a chromosome mutation.
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Offline Burhan.arshad

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1600 on: May 23, 2010, 03:23:04 pm »
please explain following question......
chemistry paper 2......M/J/07

section A
Q7 part C

section B
Q11 part D
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Offline Moonlyte

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1601 on: May 23, 2010, 03:24:34 pm »
i'm soo dead....tomorrow i've got bio p3, gce as-maths M1 and C1  :(
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Offline Moonlyte

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1602 on: May 23, 2010, 03:25:31 pm »
Quote from: Burhan.arshad on May 23, 2010, 03:23:04 pm
please explain following question......
chemistry paper 2......M/J/07

section A
Q7 part C

section B
Q11 part D

sorry i'm not doing p2...but good luck!
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nid404

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1603 on: May 23, 2010, 03:26:22 pm »
Guys, the problem is i don't have the papers now. It's over a year since i gave the igz. If possible upload the papers or simply paste the question here.

Thanks
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Offline Burhan.arshad

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #1604 on: May 23, 2010, 03:29:03 pm »
http://www.srepapmaxeeeerf.org/O%20Level/Chemistry/CIE/2007%20Jun/5070_s07_qp_2.pdf


this is the link to paper.....
please explain Q7c and 11d
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