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

What are the differences between the two type of classification system? (4)

They'll normally ask you features of the domain so
-domain is made up of 3 groups: archae, archaebacteria and eukaryotes
-domain is based on RNA, DNA
-domain reflects the similarities between eukaryote kingdoms
-domain reflects on origins on eukaryotes and prokaryotes

Reply 841

cookiess

3

Original post by wndms

"Explain the relationship between classification and taxonomy"

"Explain the relationship between classification and phylogeny"

Can someone explain this please? I just don't get the actual difference.. although I know their definitions are different.

Posted from TSR Mobile

Classification: sorting living things into groups. Has a couple of uses: makes it easier to identify a living organism, makes it easier to study organisms, shows evolutionary relationship between organisms
taxonomy: study of the principles of classification e.g. the difference between species
Phylogeny: study of evolutionary history using an evolutionary tree

Reply 842

cookiess

3

Original post by HeyMickey6

Well it hasn't come up so I think is worth knowing about it.

Probably, but it's not in the textbook so I wouldn't stress about it :smile:

Reply 843

Prees

Original post by cookiess

Probably, but it's not in the textbook so I wouldn't stress about it :smile:

Yes it is, page 164-165 'Discuss the global impact'

Reply 844

chloemily

[INDENT]With regards to antibodies and their actions, my notes and different textbooks have different explanations of Neutralisation; some say that it's the antibodies binding to the toxins released by the pathogens to neutralise their effect, but other books say it's the binding of the antibodies to the antigens in order to prevent them binding to cells in the body and therefore neutralising them. Which is correct?[/INDENT]

Reply 845

Prees

Original post by chloemily

[INDENT]With regards to antibodies and their actions, my notes and different textbooks have different explanations of Neutralisation; some say that it's the antibodies binding to the toxins released by the pathogens to neutralise their effect, but other books say it's the binding of the antibodies to the antigens in order to prevent them binding to cells in the body and therefore neutralising them. Which is correct?[/INDENT]

Antibodies bind to the antigen on the pathogen which stops the pathogen from binding to other cells receptors and infecting them :smile:

Reply 846

FootyMad123

4

if there is a question on simpsons index of diversity, will they give us the formula?

Reply 847

Grammar Kid

One last big favour... Dont suppose anyone has a list of what came up in january (saw a similsr thing on thr f211 page and it was really usefull)

Reply 848

chloemily

Original post by Grammar Kid

One last big favour... Dont suppose anyone has a list of what came up in january (saw a similsr thing on thr f211 page and it was really usefull)

From what I can remember, first question was classification with a dichotomous key and adaption stuff, then there was a lot on immunity and vaccinations etc., an 6/8 marker on the roles of RNA in plasma cells/antibodies, another big question on the advantages and disadvantages of using microorganisms for food (mycoprotein), a couple pages on carbohydrates and lipids, and to finish there was a definition table for evolution and biodiversity :smile:

And thanks for answering my question Prees :biggrin:

Reply 849

cookiess

3

Original post by Prees

Yes it is, page 164-165 'Discuss the global impact'

oh right, my bad :/. Yeah- but the only section you actually have to know on the double spread is ''why are diseases important'' which you can kind of work out via common sense and then you have the WHO and how they control it. The other sections will be given to you cause they have facts and figures. Biology isn't about memorising figures, it's about analysing statistics and seeing the correlation between the two bivariate variables :smile:

Reply 850

jollygood

8

hey guys any idea how many raw marks do we need to get full UMS? what was the trend in the previous papers?

Reply 851

cookiess

3

Original post by FootyMad123

if there is a question on simpsons index of diversity, will they give us the formula?

I think they will- they have on previous past papers...making us learn it would be mean xD

Reply 852

Grammar Kid

Original post by chloemily

From what I can remember, first question was classification with a dichotomous key and adaption stuff, then there was a lot on immunity and vaccinations etc., an 6/8 marker on the roles of RNA in plasma cells/antibodies, another big question on the advantages and disadvantages of using microorganisms for food (mycoprotein), a couple pages on carbohydrates and lipids, and to finish there was a definition table for evolution and biodiversity :smile:

And thanks for answering my question Prees :biggrin:

That sounded like an horrific paper haha

Reply 853

Unsworth

14

I will put forward my guestimates of what I think may come up, but take it with a pinch of salt :u:

- DNA replication
- Immune response
- Smoking/smoking diseases
- Water
- Compare & contrast a globular/fibrous protein
- Conservation in situ/ex situ
- Domain/Kingdom classification system contrast/compare

But as it's OCR they may just make half the paper on enzymes like last summer...

Reply 854

xKaylax

2

What do monophyletic and polygenetic groups mean?

Reply 855

almazzee

Original post by jollygood

hey guys any idea how many raw marks do we need to get full UMS? what was the trend in the previous papers?

I'd like to know this too! If anyone could guestimate what it'll be this year (very roughly), that'd be great :smile:

Reply 856

cookiess

3

Original post by Unsworth

I will put forward my guestimates of what I think may come up, but take it with a pinch of salt :u:

- DNA replication
- Immune response
- Smoking/smoking diseases
- Water
- Compare & contrast a globular/fibrous protein
- Conservation in situ/ex situ
- Domain/Kingdom classification system contrast/compare

But as it's OCR they may just make half the paper on enzymes like last summer...

I love these topics!! /sobs

Reply 857

Unsworth

14

Original post by xKaylax

What do monophyletic and polygenetic groups mean?

Monophyletic group = Includes ancestral organism + all its descendants

Paraphyletic group = Includes the most recent ancestar + only some of its descendants

Got a feeling you only need to know that at A2 though, not AS.. correct me if I am wrong though :smile:

Reply 858

phaseshift

12

Original post by Unsworth

Monophyletic group = Includes ancestral organism + all its descendants

Paraphyletic group = Includes the most recent ancestar + only some of its descendants

Got a feeling you only need to know that at A2 though, not AS.. correct me if I am wrong though :smile:

Yah, thats Unit 5 'Species Concept' stuff really.

Reply 859

Unsworth

14

Original post by almazzee

I'd like to know this too! If anyone could guestimate what it'll be this year (very roughly), that'd be great :smile:

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!

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

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