Edexcel A2 Biology Unit 5 (6BIO5) - 22/06/2011- OFFICIAL THREAD !

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Reply 4120

mithrans

Original post by iesians

WTH !! you dont have the article ??! didnt your school provide oyu ??!?! SUE THEM !!

Is the pre-released material the same with the article? If not, what's different?

Reply 4121

BastardOranges

Original post by mithrans

Is the pre-released material the same with the article? If not, what's different?

The pre-release material is the article :P

Reply 4122

SimpleGirl

Original post by mithrans

Is the pre-released material the same with the article? If not, what's different?

The pre release material is the article :s-smilie:

Reply 4123

hetty123

hey guys this diagram in the biology textbook labels it as rods and cones, which is the rods (blu ones?) and which are the cones(???)
pleeeaassse hellllllpppp!!!!!
rods and cones image.docx
thanks in advance :biggrin:

Reply 4124

mithrans

Original post by hetty123

The upper one is the rod (it's thicker) and the 3 lower ones are the cones.

Reply 4125

nadzzdan

Well it can be clearly seen that page 95 in the CGP Guide is biased!!!

Reply 4126

iesians

Original post by mithrans

Is the pre-released material the same with the article? If not, what's different?

the pre release material IS the article ?! what else !!?

Reply 4127

mithrans

Original post by hetty123

I typed wrong. So the upper one is the cone and the lower ones are the rods. They are laballed as well. The cones are thicker.

Reply 4128

ghogho

Original post by nadzzdan

if the ventricles contract from bottom upwards it means the blood will be pumped into the aorta and pulmonary artery. this is important because this way all the blood is pushed up at once so there is more blood pumped at each stroke (stroke volume is high). lastly if it contracts from top to bottom blood would be pushed down essentially damaging cardiac cells... i cant think of anything more...

many thx im sure thats more than enough
:smile:

Reply 4129

M Kh

Original post by iesians

sorry, i deactivated a week ago ! :wink:

So you will like and share it when you get activated again?

Reply 4130

iesians

Original post by hetty123

the three down are rods and the top one is cone.
2 or 3 rods are usually connected to one bipolar neurone , unlike cones .

Reply 4131

Panda29

Hey guys.. In the article it talks about DNA methylation.. What is it? I looked it up.. Still didn't understand.

This was posted from The Student Room's iPhone/iPad App

Reply 4132

ghogho

Original post by M Kh

Guys here are the unit 5 topic 8 notes: http://www.mediafire.com/view/?0axz4vqmxxyq1at
All credits to the original uploader. All rights reserved.

If you like my ntes, please like this page: www.facebook.com/6bi04

many thx
but the page is nt found i already liked the page that they posted its link on unit 4 thread

Reply 4133

iesians

Original post by M Kh

So you will like and share it when you get activated again?

why not ? but that isnt gonna be any time soon.

Reply 4134

BastardOranges

Is this anyone else's last exam?

Reply 4135

iesians

Original post by kanchu

Hey guys.. In the article it talks about DNA methylation.. What is it? I looked it up.. Still didn't understand.

This was posted from The Student Room's iPhone/iPad App

DNA methylation is a method when CH3 methyl groups are attached to specifc parts of DNA and this essentially switches off the gene to which they are attahced, it is a reverse process of transcription factors (which increases gene expression) DNA methylation decreases gene expression and transcription.

Reply 4136

ghogho

Original post by BastardOranges

Is this anyone else's last exam?

meeeeeeeeeeeeeeeeeeee :biggrin:

Reply 4137

mithrans

Original post by kanchu

Hey guys.. In the article it talks about DNA methylation.. What is it? I looked it up.. Still didn't understand.

This was posted from The Student Room's iPhone/iPad App

DNA methylation is the process of adding methyl -CH3 groups to some bases in the DNA. It is a method of inhibiting gene expression.