Edexcel GCE Biology Unit 4 6BI04 June 2013

Original post by benyp7

I think it was two or three marks for the mitosis question... not sure.
But the biotic factor... the cells were photosynthetic weren't they? So they make their own food? I said about competition for water from other organisms, not sure though...

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I said competition for nutrients from other species.... :/ wasn't it two mark qs?

Reply 562

Qwob

I'm trying to remember what the topics were for each question, could anyone help me out?

1.
2. Photosynthesis?
3. NPP/GPP and Carbon Cycle
4.
5.
6.
7. DNA and pathogens
8. Species, reproductive isolation - Chiffchaffs and Warblers

(edited 10 years ago)

Reply 563

benyp7

Original post by HQazi

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I said competition for nutrients from other species.... :/ wasn't it two mark qs?

Yeah pretty much the same as me then, i think so...

Reply 564

RnTf

5

Original post by Sandy7

I think the A boundary will be 68/90!

impossible

Reply 565

Original post by benyp7

Yeah pretty much the same as me then, i think so...

Posted from TSR Mobile

Lol, hopefully it won't be that bad. There are generous examiers out there :smile:

Reply 566

Qwob

Original post by HQazi

Posted from TSR Mobile

Lol, hopefully it won't be that bad. There are generous examiers out there :smile:

I remember doing a past paper and there was the same question for two marks - two of the marks were 1) skin acts as a physical barrier and 2) skin flora outcompetes pathogenic bacteria for nutrients/space/etc. There will probably be other points to get marks like others have mentioned, you have most likely got 2/2 marks on that question though I reckon.

Reply 567

p1234h

did anyone else get stuck on the photsynthesis question, where it had the picture of the leaf.. can't remember the question but what were the answers to those two?

Reply 568

Original post by benyp7

The question didnt ask what they were, it asked for you to suggest what they do...
You needed to say they aid in the translation and transcription of the viral RNA so new viruses could be replicated.
I doubt there will be any marks for naming enzymes!

Yes I know they were not asking to name the enzymes. I was just asking what enzymes they could have been talking about.
That is where I mentioned that one enzyme involved in reversing transcription from viral RNA into viral DNA, and another enzyme integrating the Viral DNA into the host's DNA.

Reply 569

Original post by p1234h

did anyone else get stuck on the photsynthesis question, where it had the picture of the leaf.. can't remember the question but what were the answers to those two?

Something about midrib and lamina's.....

Reply 570

Original post by HQazi

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Lol, hopefully it won't be that bad. There are generous examiers out there :smile:

I put Competition for the biotic factor. And I said exactly what you said about the nutrients and space.

Reply 571

p1234h

Original post by C94

Something about midrib and lamina's.....

yeah thats the one, what was the answer? :s-smilie:

Reply 572

Original post by p1234h

yeah thats the one, what was the answer? :s-smilie:

I'm not sure, my answer was terrible. I definitely lost marks there.

Reply 573

Original post by Qwob

I remember doing a past paper and there was the same question for two marks - two of the marks were 1) skin acts as a physical barrier and 2) skin flora outcompetes pathogenic bacteria for nutrients/space/etc. There will probably be other points to get marks like others have mentioned, you have most likely got 2/2 marks on that question though I reckon.

Posted from TSR Mobile
Oh yes! I wrote about skin flora competing for space too
Thanks btw :smile:

(edited 10 years ago)

Reply 574

Original post by p1234h

yeah thats the one, what was the answer? :s-smilie:

Posted from TSR Mobile

Lamina contains chlorophyll right? There storma where LIR takes place? Therefore would make glucose from GALP....
And the midrib would carry minerals from the soil? Which maybe used up? I'm not sure if they are right but I think that's what I wrote :frown:

(edited 10 years ago)

Reply 575

demiman123

first question was chloroplast and nucleus which identifys it as a eukaryotic cell?
what did everyone write for the how will NPP values benefit the farmer for his cattle or something?

Reply 576

Abod

3

Original post by C94

I'm not sure, my answer was terrible. I definitely lost marks there.

The question was about THIN lamina and VESSELS in midrib.
For lamina, I said light will reach all photosynthetic cells for light dependent reactions
For vessels. Provide water to cells? :confused:

They asked why thin lamina and vessels in midrib are a good thing, right?

Reply 577