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OCR Biology F212 Revision [3rd June 2013] (Now Closed)

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Original post by Tom_hess
Thanks! Now if a 7 marker comes up on this... :wink:


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Haha, I would love a 7 marker to come up for this!

Good luck!
Reply 881
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Tom_hess
State three aesthetic reasons why we should conserve biodiversity (3)




Flowers are pretty.
Animals are pretty.
Lots of different animals and lots of different plants is therefore, pretty.


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(edited 10 years ago)
Question for everyone:

What evidence were the first classification systems solely based on? [1 Mark]
Reply 883
Avatar for BioGeek
BioGeek
OP
13
Original post by LaughingGas
Question for everyone:

What evidence were the first classification systems solely based on? [1 Mark]


Based upon observable features.
Reply 884
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BioGeek
OP
13
Original post by Tom_hess
Flowers are pretty.
Animals are pretty.
Lots of different animals and lots of different plants is therefore, pretty.


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That is true. But I think you need be a bit more specific than that haha:s-smilie:
Hi guys

Can someone help me with this question please?

"Describe the differences between a classification system based on domains and one based on Kingdoms" [4]
Reply 886
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jadec123
I found this document made by OCR which shows some example 'high band' answers if anyone wants to see what they're looking for :smile: It's useful and gives a guideline of how much information you need to include. :^_^: http://www.ocr.org.uk/Images/67489-unit-f212-molecules-biodiversity-food-and-health-high-band.pdf
Reply 887
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Sid101
Has anyone got any sheets or any sort of resource which explains how to do experiments investigating the factors affecting enzymes? Thank you! :smile:
Reply 888
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Tom_hess
Original post by Limitless!
Hi guys

Can someone help me with this question please?

"Describe the differences between a classification system based on domains and one based on Kingdoms" [4]


3 domains- archaea, eukaryota and bacteria

5 kingdoms - animalia, plantae, protoctista, prokaryote and fungi

Animalia, plantae, protoctista and fungi are in eukaryota
Prokaryote is split between archaea and bacteria based upon RNA proteins and genetic material



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Reply 889
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Tom_hess
Original post by BioGeek
That is true. But I think you need be a bit more specific than that haha:s-smilie:


Is there any context in the question? As all I can think about the aesthetics is that they look good, therefore they can attract people(leading it into economic)..?


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Reply 890
Avatar for jadec123
jadec123
Original post by Limitless!
Hi guys

Can someone help me with this question please?

"Describe the differences between a classification system based on domains and one based on Kingdoms" [4]

The domain system has three different categories- archaea, bacteria and eukaryote whereas the kingdom has 5 categories, animalia, protoctista, fungi, prokaryotae and plantae.
The domain system uses eukaryote (which includes plantae, animalia, fungi and protoctista) whereas it split the prokaryotic groups into two categories- archaea and bacteria. This is because scientists noticed that there was a difference between rRNA genes which arose seperately from each other in many prokaryotics. As a result, some prokaryotic had genes more similar to eukaryotics than the rest of the prokaryic group. As a result, they split the prokaryotae into two groups to signify the differences.
The domain system is fairly broad whereas the kingdom system divides the groups further.
(woah that's confusing... sorry if it's wrong!)
Original post by Tom_hess
3 domains- archaea, eukaryota and bacteria

5 kingdoms - animalia, plantae, protoctista, prokaryote and fungi

Animalia, plantae, protoctista and fungi are in eukaryota
Prokaryote is split between archaea and bacteria based upon RNA proteins and genetic material

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Thank you very much :smile::smile:
Reply 892
Avatar for jadec123
jadec123
Original post by Sid101
Has anyone got any sheets or any sort of resource which explains how to do experiments investigating the factors affecting enzymes? Thank you! :smile:

This pdf is pretty good! http://asbiology101.files.wordpress.com/2009/09/3-12-investigating-enzymes.pdf
the website has loads of revision notes on everything else too :smile:
Original post by jadec123
The domain system has three different categories- archaea, bacteria and eukaryote whereas the kingdom has 5 categories, animalia, protoctista, fungi, prokaryotae and plantae.
The domain system uses eukaryote (which includes plantae, animalia, fungi and protoctista) whereas it split the prokaryotic groups into two categories- archaea and bacteria. This is because scientists noticed that there was a difference between rRNA genes which arose seperately from each other in many prokaryotics. As a result, some prokaryotic had genes more similar to eukaryotics than the rest of the prokaryic group. As a result, they split the prokaryotae into two groups to signify the differences.
The domain system is fairly broad whereas the kingdom system divides the groups further.
(woah that's confusing... sorry if it's wrong!)



Thank you very much that really helped! :smile::biggrin:
Reply 894
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almazzee
Original post by Unsworth
Depends entirely on grade boundaries which can fluctuate quite a lot each year. But generally if you get 85+ raw marks that will guarantee you full ums, it can be as low as 78-80 though, again depending on how high/low the grade boundaries are!


You're amazing, thank you!
That seems do-able, since I'm aiming for about 90 - 100% UMS, but I guess we'll just have to wait and see what OCR throws at us tomorrow :s-smilie:

Good luck! :biggrin:
Reply 895
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wndms
1
Is rRNA same as RNA we talk about to make ribosomes?

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Original post by wndms
Is rRNA same as RNA we talk about to make ribosomes?

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There are 3 types of RNA

mRNA (messenger RNA, involved in protein synthesis etc)
tRNA (transfer RNA, involved in translation in ps)
rRNA (ribosomal RNA, used to make ribosomes)

They all have the same bases etc

Hope that helps :smile:
Original post by Limitless!
Hi guys

Can someone help me with this question please?

"Describe the differences between a classification system based on domains and one based on Kingdoms" [4]


A system based on domains would have 3 taxas- eukaryotes , eubacteria, archaebacteria whereas a system based on kingdoms would have 5 taxa- plantae , animalia, fungi, protoctista, prokaryotae xx would that be 4 marks guys ?


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Reply 898
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htr5
7
I have done 0% revision and I barely listened in lessons because I've wanted to drop biology but the school didn't let me becauseof blah blah blah.

I got a B in the January exam and a C in the coursework. I didn't want to submit a U grade to a uni hence wanting to drop as I'm interested in physics and maths.
What are the consequences of not turning up to the exam?
I know i'll get a few responses along the lines of turn up and hope for the best but I think it will be a waste of time.
(edited 10 years ago)
I've made notes on everything but can't seem to remember it .. Any tips guys ? I've read out and watched videos etc .. Not sticking 😿 .. Tips on gettin a b? What have been b grade boundaries in the past ? Please and thanyou xx and good luck tommorow guys x


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