Edexcel 6BIO2 ~ 3rd June 2013 ~ AS Biology

Reply 240

jojo1616

Original post by QUANTAM

how many past papers should I do?

Do all the new syllabus, not that many

Posted from TSR Mobile

Where's unit 1?

Original post by Me123456789

Where's unit 1?

http://www.thestudentroom.co.uk/showthread.php?t=2343705

Reply 243

Heypopsicle

9

some of my friends finish tomorrow.

:banghead:

Reply 244

QUANTAM

11

Original post by jojo1616

Do all the new syllabus, not that many

Posted from TSR Mobile

Thanks

Reply 245

kevsamuel

We don't have to know the apoplast pathway and symplast pathway (movement of water through the roots) or epistasis right? Because my teacher taught me them however they weren't in the syllabus. Please correct me if I'm wrong.

thanks :smile:

Reply 246

Me123456789

21

Original post by ALevel96

i believe you got 120 ums in unit 1..
Can I ask you how you take notes, how you prepare for the exam, how long before the exam, and stuff please

Original post by The Assassin

Haha cool. I'm in the process of making them now. They should be done within a week or so :-)

What unit 1 notes? Have you posted them on here?

Reply 247

344302

16

Original post by kevsamuel

We don't have to know the apoplast pathway and symplast pathway (movement of water through the roots) or epistasis right? Because my teacher taught me them however they weren't in the syllabus. Please correct me if I'm wrong.

thanks :smile:

Nope you don't

Posted from TSR Mobile

Reply 248

student55

hey

what's the difference between accurate, reliable and valid? I get so confused by these and end up losing marks:')
Also does anyone else think the grade boundaries are ridiculously high for this exam?

Reply 249

leafy9

11

I don't know but, does anyone have unit 2 notes that can be reposted? Or maybe a link?
Thanks

Reply 250

amdz

Original post by The Assassin

Updated version.

These were brilliant, thank you! [Page 4 of the thread, first post]

Might put mine up a bit later, I basically wrote perfect answers to all the 2+ mark questions from past papers based on the mark schemes.

Reply 251

344302

16

Original post by student55

hey

what's the difference between accurate, reliable and valid? I get so confused by these and end up losing marks:')
Also does anyone else think the grade boundaries are ridiculously high for this exam?

What is the average mark for an A? I've only done one paper so far and I got 64 which was an A

Valid - Does the test measure what it is set out to measure? Is everything being controlled?
Reliable - If you repeat the experiment, will you get the same results? Can the results be replicated?
Accurate - Are the results close to the true/expected value?

Reply 252

student55

Original post by 344302

What is the average mark for an A? I've only done one paper so far and I got 64 which was an A

Valid - Does the test measure what it is set out to measure? Is everything being controlled?
Reliable - If you repeat the experiment, will you get the same results? Can the results be replicated?
Accurate - Are the results close to the true/expected value?

Thank you!

Well January 2013, it was 49 just for an E, and 56 for a C. 64 was an A:/
It just seems really high compared to all my other subjects where half or just over is a C!

Reply 253

LucyO_103

9

Hey does anyone know where to find Past papers in WORD FORMAT for this unit? My school has blocked the printing of PDFs! I'd be really grateful if anyone could upload past papers in word format or send me a link...thanks!

Reply 254

Rubyturner94

Original post by mynameisntbobk

http://www.thestudentroom.co.uk/showthread.php?t=2343705

Here it is :smile:

Posted from TSR Mobile

1369167106705.jpg45.7KB

Reply 255

username1097440

5

Original post by Rubyturner94

Here it is :smile:

Posted from TSR Mobile

What do you have to do for question e?

Posted from TSR Mobile

Reply 256

Rubyturner94

Original post by JRN-95

What do you have to do for question e?

Posted from TSR Mobile

That was the one i was stuck on but now i get it. When hydrochloric acid (HCl) reacts with an alcohol it produces a chloroalkane. So that is where one of the chlorines go. The OH is substitued with a Cl.
Another HCL will react with the double bond in an electrophilic addition reaction. There will be two isomes because the Cl could end up on carbon 2 in the double bond or carbon 3. That is why there is two possible products. Hope i helped.

Posted from TSR Mobile

Reply 257

username1097440

5

Original post by Rubyturner94

That was the one i was stuck on but now i get it. When hydrochloric acid (HCl) reacts with an alcohol it produces a chloroalkane. So that is where one of the chlorines go. The OH is substitued with a Cl.
Another HCL will react with the double bond in an electrophilic addition reaction. There will be two isomes because the Cl could end up on carbon 2 in the double bond or carbon 3. That is why there is two possible products. Hope i helped.

Posted from TSR Mobile