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

Original post by HarryMWilliams

You need to know what agglutination is, you don't really need to know lysis/antitoxins/opsonisation - a question which focussed on those would probably give you some text with information in as it isn't specification derived.

What's opsonisation?

Reply 183

Guys I need mnemonic to remember the way organisms(living) are classified - taxonomy.

Reply 184

phaseshift

12

Original post by rival_

What's opsonisation?

Not a clue - hence, I don't think you need to know it. :tongue:

**Disclaimer, done the exam already!**

Original post by rival_

Guys I need mnemonic to remember the way organisms(living) are classified - taxonomy.

You mean: DKPCOFGS?

Reply 185

Original post by HarryMWilliams

Not a clue - hence, I don't think you need to know it. :tongue:

**Disclaimer, done the exam already!**

You mean: DKPCOFGS?

That would be the acronym ;-) but yeah there's a popular one like King Phylum Ordered something something... I can't remember it lol

And are you resitting?

Reply 186

wndms

1

Original post by rival_

That would be the acronym ;-) but yeah there's a popular one like King Phylum Ordered something something... I can't remember it lol

And are you resitting?

Remember domain.. then King Prawn Curry Or Fat Greasy Sausages!!!!!!!! Lol

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Reply 187

otrivine

14

anyone want to revise chapter 1 and immunity

Reply 188

Original post by wndms

Remember domain.. then King Prawn Curry Or Fat Greasy Sausages!!!!!!!! Lol

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Awks; I'm a veggie hahahahahahahah

Reply 189

Student296

8

Original post by HarryMWilliams

You need to know what agglutination is, you don't really need to know lysis/antitoxins/opsonisation - a question which focussed on those would probably give you some text with information in as it isn't specification derived.

Which revision guide do you think is better the OCR revise one or the CGP, I have a week to learn practically everything, any tips?

Reply 190

How are people revising for this, using the spec or the text book?

Reply 191

HeyMickey6

What is the Rio Convention on Biological Diversity ?

Reply 192

ladybug.hugsxoxo

Hi guys as silly as this is i haven't started revision for f212 (been ill and other exams ) and I'm being overwhelmed by the content as I presently try and make a timetable for it ? Anytips on how to cram or any predictions on what will come up ? Please and thankyou xx

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Reply 193

nevarsan

Guys whats the difference between coenzymes and cofactors?

Reply 194

Giggles96

hey, can someone explain the difference between 'high specific heat capacity' and 'high latent heat of evaporation' please? :smile:

Reply 195

Original post by Giggles96

hey, can someone explain the difference between 'high specific heat capacity' and 'high latent heat of evaporation' please? :smile:

Specific heat capacity is the amount of energy needed to raise the temperature by 1 degree. So Water has a high specific heat capacity, meaning it needs a lot of energy to change it's temperature. Therefore the temperature remains mostly stable, ensuring optimum conditions for enzyme and other metabolic activities.

Latent heat of vaporization is to do with the evaporation of water, you can remember it more easily by thinking of it as Latent heat of 'evaporation'. Water uses up a lot of energy, or absorbs, a lot of energy when it is evaporated. Therefore humans sweat a lot, due to it being an efficient cooling mechanism. Evaporation takes up a lot of energy, so it removes a lot of heat from the surface.

Both of these characteristics of Water molecules rise primarily from Hydrogen bonding. Hydrogen bonding is 'weak', but there are lots of hydrogen bonds, which is crucial.

Hope this helped :smile:

Reply 196

Original post by nevarsan

Guys whats the difference between coenzymes and cofactors?

Coenzymes are usually organic molecules, which take part in the enzyme catalysed reaction. They do change during the reaction, but unlike the substrates, they are actually recycled so they can take part in the same reaction again. Their main role is to carry chemical groups between different enzymes, although this is not really part of the spec :smile:

Cofactors on the other hand are usually INorganic ions. Their mere presence helps speed up an enzyme controlled reaction, because they allow enzyme-substrate complexes to form more easily. A good example to remember is Amylase enzymes requiring Chloride ions.

Reply 197