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AQA BIOL5 ~ 17th June 2013 ~ A2 Biology

Reply 4880

rm.xo

Original post by TauMuon

My advice: don't stress over the essay! Concentrate on the rest of the exam, it's worth 3 times as many marks :smile:

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That's what I've been telling myself hahaha

Reply 4881

rm.xo

Original post by hype

Last minute essay tips, anyone?

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Stay calm.
read the question properly.
read all the information before powering through the question.
if you're stuck, don't dwell on the question. Come back to it.
think logically and apply the specifics of your knowledge.

Reply 4882

Eloades11

17

Just to let you all know, I'm not taking the exam myself, I'm currently doing a degree in biology and I have my own exam this afternoon :frown:

but I will help you all out as much as I can before your exam!

Best of luck everyone! :h:

Reply 4883

Tikara

Original post by rm.xo

rubisco in Calvin cycle.
DNA helicase, polymerase and ligase in transcription.
ATPase in muscle contraction

Lipases and other enzymes secreted by saprobiotic bacteria
dehydrogenase to oxidise co enzymes

Reply 4884

persian-boy

Original post by lcj0503

Anyone else doing the essay first??

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i would look at the essay topics and i will choose one of them before i do the other question but i wont definately do the essay first!!essay is only 25 marks out of 100!!get others out of the way and than focus on ur essay!!GOOOOD LUCK

Reply 4885

Tikara

Original post by Eloades11

Just to let you all know, I'm not taking the exam myself, I'm currently doing a degree in biology and I have my own exam this afternoon :frown:

but I will help you all out as much as I can before your exam!

Best of luck everyone! :h:

ahh thats why you knew so much :P

Reply 4886

anniedink

Original post by Eloades11

You could write about it's role in photosynthesis, eg for photolysis. I'm sure you also know about osmosis and water involved in respiration.

Any chance you could summarise the involvement of water in the unit 4 stuff? I didn't get round to revising unit 4.

Reply 4887

Tikara

Original post by persian-boy

i would look at the essay topics and i will choose one of them before i do the other question but i wont definately do the essay first!!essay is only 25 marks out of 100!!get others out of the way and than focus on ur essay!!GOOOOD LUCK

I'm gonna smash the exam in like 45 mins, check - then spend the rest of the time just writing everything I've ever learnt into the essay haha

Reply 4888

paul343

Can anyone explain ci to me? I'm stumped. ImageUploadedByStudent Room1371464908.984861.jpg

My answers pretty rubbish so just ignore it ahah

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Reply 4889

rm.xo

Original post by lcj0503

Anyone else doing the essay first??

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I wouldn't recommend doing that. If you get panicked over the essay then you may mess up the questions. But if you do, remember to keep an eye on the time and that the questions are worth 3x the amount that the essay is.

Reply 4890

Eloades11

17

Original post by Tikara

ahh thats why you knew so much :P

Yeah I'm not here to intimidate you all :tongue:

I've been studying biology for a few more years :smile:

Original post by anniedink

Any chance you could summarise the involvement of water in the unit 4 stuff? I didn't get round to revising unit 4.

Sorry I don't know what was covered in unit 4. But if you had an essay on water, then some simple things you could write about include osmosis, and photosynthesis.

Reply 4891

rm.xo

Original post by paul343

Can anyone explain ci to me? I'm stumped. ImageUploadedByStudent Room1371464908.984861.jpg

My answers pretty rubbish so just ignore it ahah

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somebody used this before...

undigested DNA

----------

completely digested DNA

--
---
-----

partially digested DNA

--
---
-----
----------

therefore the partially digested DNA adds upto more than that of the origional

Reply 4892

rommy123

goshh im soo nervous! hope this paper is similar to last years, and AQA give us a good essay to do.

Reply 4893

Eloades11

17

Original post by paul343

Can anyone explain ci to me? I'm stumped. ImageUploadedByStudent Room1371464908.984861.jpg

My answers pretty rubbish so just ignore it ahah

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Electrophoresis separates fragments of DNA based on their size, the smaller fragments will move further whilst the larger fragments (containing more bp's of DNA) will not move as much. You could then compare the distance traveled to a table of data and estimate the size/how many base pairs there are.

Reply 4894

SarahM-801

Original post by ans16

can someone please explain question 3d i http://filestore.aqa.org.uk/subjects/AQA-BIOL5-W-QP-JUN11.PDF

I think 3.d.i. is looking for the differences between the cuticles, so the upper cuticle is usually thicker and waterproof to reduce transpiration, so it's harder for NAA to diffuse through it.. thicker I'd assume means longer diffusion pathway, so slower rate of diffusion/uptake.
3.d.ii. Different species would have slightly different leaf structures such as more/fewer stomata, or thicker/thinner cuticles.

Reply 4895

lcj0503

Original post by rm.xo

I wouldn't recommend doing that. If you get panicked over the essay then you may mess up the questions. But if you do, remember to keep an eye on the time and that the questions are worth 3x the amount that the essay is.

Oh maybe I shouldn't do that then I was just scared about running out of time. I might do all questions I find easiest on the paper then the essay then go back to the more difficult questions if time allows that way I'm not wasting time on difficult questions leaving less for the essay! So nervous!! :-((

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Reply 4896

paul343

Original post by rm.xo

somebody used this before...

undigested DNA

----------

completely digested DNA

--
---
-----

partially digested DNA

--
---
-----
----------

therefore the partially digested DNA adds upto more than that of the origional

No that's not the question haha you answered the question before this one

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Reply 4897

helpme456

can anyone summarise gene therapy please?

Reply 4898

paul343

Original post by Eloades11

Electrophoresis separates fragments of DNA based on their size, the smaller fragments will move further whilst the larger fragments (containing more bp's of DNA) will not move as much. You could then compare the distance traveled to a table of data and estimate the size/how many base pairs there are.

Thanking you

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Reply 4899

anniedink

Original post by Eloades11

Yeah I'm not here to intimidate you all :tongue:

I've been studying biology for a few more years :smile:

Sorry I don't know what was covered in unit 4. But if you had an essay on water, then some simple things you could write about include osmosis, and photosynthesis.

All of the photosynthesis stages like the krebs cycle and stuff, i just wanted to know the involvement of water in LIR and LDRs

AQA BIOL5 ~ 17th June 2013 ~ A2 Biology

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