MissGeek
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This is the thread for discussion and preparation for the upcoming Edexcel Biology unit 2 on 14 January 2014 (iAL) exam.
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TSR Learn Together
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Nora R. Chloe
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Here is the thread for unit-1 Biology....
http://www.thestudentroom.co.uk/show...4#post45678544
Hey as we both have threads for the coming Bio u- 1 & 2 exam, let's start revising! Please state the bio books you will be considering. I'll state my favorite books on U-1 thread too..
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Siygn
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Test me in Biology unit 2... i think I'm ready
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Nora R. Chloe
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(Original post by Siygn)
Test me in Biology unit 2... i think I'm ready
Great! So u r going to do quite well in your exam? Keep it up!!!
As I've my u-1 exam ahead , I'll ask u questions later... bye
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Lost_Life
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sure thing :P
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Nora R. Chloe
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(Original post by MissGeek)
This is the thread for discussion and preparation for the upcoming Edexcel Biology unit 2 on 14 January 2014 (iAL) exam.
So can we start it?
What's gonna be first?
Experiments or normal questions?
I'm nervous about the exam!
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Chinensis8
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I think they might ask questions from unit 1. Just in case, i think everyone should know the general ideas.
And as for the Qs...
I'd say that there would be more Qs on plants this time since last year there was only one. But that's just me.
Btw does anyone understand the cycles in interphase?
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MissGeek
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(Original post by Nora R. Chloe)
So can we start it?
What's gonna be first?
Experiments or normal questions?
I'm nervous about the exam!
There's always a chance that there will be a 5 marker on an experiment; which is either based on 1 of the core practicals or using your ideas from the core practicals to adapt to the current situation in the exam, e.g. that 5 mark enzyme question on Simone and suggesting how he could have done the experiment in Unit 1, so just describing how the typical enzyme concentration experiment works but applying things such as control variables to the scenario in the exam, if that makes sens lol
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Chinensis8
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Found this somewhere ages ago.

Why take repeat measurements in an experiment?
- Make results more reliable
- so a reliable mean can be calculated
- Identify anomalous results

How does a double blind trial improve reliability?
- Prevents bias
- Prevents vested interest of scientists
- Prevents a placebo effect

How can a scattergraph be used to predict results beyond the last data point?
- Use a line of best fit
- Extend the line (extrapolate)

When viewing tissue cells through an optical microscope why is it important that the sample is thin?
- Need only a single layer of cells
- So light can pass through
- Detail is not obscured by cells underneath

How do you ensure a sample gives reliable data?
- Large sample size
- Chosen randomly


Those seem to be common questions. And as for experiments I have some notes on the matter
Attached files
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Nora R. Chloe
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(Original post by MissGeek)
There's always a chance that there will be a 5 marker on an experiment; which is either based on 1 of the core practicals or using your ideas from the core practicals to adapt to the current situation in the exam, e.g. that 5 mark enzyme question on Simone and suggesting how he could have done the experiment in Unit 1, so just describing how the typical enzyme concentration experiment works but applying things such as control variables to the scenario in the exam, if that makes sens lol
True that!
I guess experiments are a bit of a challenge cause the amount of time we are given is never sufficient for answering their papers!
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Nora R. Chloe
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(Original post by Chinensis8)
Found this somewhere ages ago.

Why take repeat measurements in an experiment?
- Make results more reliable
- so a reliable mean can be calculated
- Identify anomalous results

How does a double blind trial improve reliability?
- Prevents bias
- Prevents vested interest of scientists
- Prevents a placebo effect

How can a scattergraph be used to predict results beyond the last data point?
- Use a line of best fit
- Extend the line (extrapolate)

When viewing tissue cells through an optical microscope why is it important that the sample is thin?
- Need only a single layer of cells
- So light can pass through
- Detail is not obscured by cells underneath

How do you ensure a sample gives reliable data?
- Large sample size
- Chosen randomly


Those seem to be common questions. And as for experiments I have some notes on the matter
Thanks!!
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Fuzzy
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which experiment do you think might come?
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Chinensis8
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(Original post by Nora R. Chloe)
Thanks!!
Nps


(Original post by Fuzzy)
which experiment do you think might come?
Honestly with iAL... Anything can come up really. It's new and all. Just try to learn all of them by heart. Daphnia hasn't come up in a while and antibiotic properties in plants.
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Fuzzy
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(Original post by Chinensis8)
Nps



Honestly with iAL... Anything can come up really. It's new and all. Just try to learn all of them by heart. Daphnia hasn't come up in a while and antibiotic properties in plants.
i dont think daphnia will come cz this is unit 2 rit? but antibiotic properties might come...im a little nervous for the paper...
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Nora R. Chloe
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(Original post by Fuzzy)
i dont think daphnia will come cz this is unit 2 rit? but antibiotic properties might come...im a little nervous for the paper...
I too think ''antimicrobial properties'' might come up this time! If you are unsure on how to write to score max, refer to the mark scheme of may 2009 bio u-2 paper Q no. 3 (c)
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Chinensis8
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(Original post by Fuzzy)
i dont think daphnia will come cz this is unit 2 rit? but antibiotic properties might come...im a little nervous for the paper...

Oh crud.... My bad Well it's either that or plant mineral deficiencies then. Haven't seen those is a while.
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Fuzzy
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(Original post by Nora R. Chloe)
I too think ''antimicrobial properties'' might come up this time! If you are unsure on how to write to score max, refer to the mark scheme of may 2009 bio u-2 paper Q no. 3 (c)
thnx will do...good luck fr da paper!!!
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Fuzzy
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(Original post by Chinensis8)
Oh crud.... My bad Well it's either that or plant mineral deficiencies then. Haven't seen those is a while.
thats ok...anywyz, good luck fr da paper
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Nora R. Chloe
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(Original post by Fuzzy)
thnx will do...good luck fr da paper!!!
You are welcome! Good luck to you too!!
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