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Edexcel GCE Biology Unit 4 6BI04 June 2013

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

I said how the thin layer would increase surface area so, would result in a higher rate of photosynthesis so would create glucose which can be used to create cellulose (it did relate the question to cellulose?)

Then the midrib I said how it would most likely contain Xylem which would transport water to the cells and that water is split in the lightdependent reaction to create ATP/NADPH, which is used to convert GP-->GALP to create sugar etc.

Not sure if that's what they wanted now though :L

Reply 581

Huntx

For the biotic factor I wrote disease..and then went on to say that biotic factors do not affect the distribution of organisms but affect the abundance. This Gould be right as it asked for effect on distribution.

Reply 582

Huntx

I did a 2 hour eco 4 paper then a 5 min break then the bio 4 paper..feeling wasted

Reply 583

Huntx

As for the cArbon neutral question.. It was because the trees that have been cut down are going to be burnt or will decay..both process release co2 into the atmo

Reply 584

HQazi

Original post by Huntx

As for the cArbon neutral question.. It was because the trees that have been cut down are going to be burnt or will decay..both process release co2 into the atmo

Posted from TSR Mobile
What about them being carbon sinks - as in they store co2 from the atmosphere/ photosynthesis
And I mentioned the machinery being used will also produce co2.... this I saw in one if the old mark scheme so thought maybe would be a point on this one too

Reply 585

CharlieWalden

Hey everyone. Could someone compose a list of what to go over for tomorrows exam?

Reply 586

explicit4u

Original post by Huntx

I did a 2 hour eco 4 paper then a 5 min break then the bio 4 paper..feeling wasted

That's harsh, I got a 30 minute break in between! I'm the only one doing Economics and Biology in my year so I was by myself in a massive exam room with 2 invigilators :redface:

Reply 587

C94

Original post by HQazi

I mentioned carbon sinks,
Microorganisms respiring the dead organic material also releasing Co2...

Reply 588

C94

Original post by CharlieWalden

Hey everyone. Could someone compose a list of what to go over for tomorrows exam?

What exam's tomorrow ?!?!

Reply 589

CharlieWalden

Original post by C94

What exam's tomorrow ?!?!

I have my biology tomorrow (IGCSE Edexcel)

(edited 10 years ago)

Reply 590

Huntx

Original post by CharlieWalden

I have my biology tomorrow (IGCSE Edexcel)

You my friend..are in the wrong place. Okbye

Reply 591

confusedgirl22

Original post by C94

What exam's tomorrow ?!?!

Haha i love the way you used the ?!?!?!
as my reaction was the exact same!
I thought Unit 5 was tomorrow all of a sudden and i was gonna start having a panic attack :P

Reply 592

HQazi

Original post by C94

I mentioned carbon sinks,
Microorganisms respiring the dead organic material also releasing Co2...

Posted from TSR Mobile

Ohkay :smile:

I really I picked up all the marks on that questions :frown:

Reply 593

bethanyfish

Original post by C94

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

I'm not sure if i'm right, but I put something about the thin lamina helping quicker diffusion of CO2 and then something about transporting carbohydrates to different parts of the plant for the mid rib

Reply 594

adamcarey

Original post by HQazi

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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:

For the lamina I pretty much just mentioned the light independent stage and chlorophyll and for the midrib vessels I spoke about the gas exchange of oxygen and CO2

Reply 595

HQazi

Original post by adamcarey

For the lamina I pretty much just mentioned the light independent stage and chlorophyll and for the midrib vessels I spoke about the gas exchange of oxygen and CO2

Posted from TSR Mobile
Oh, I did not mention any gas exchange fir midrib. Oh well
Btw, do you happen to have unit 5 jan 2013 paper and ms? :smile:

Reply 596

username1054067

I talked about short diffusion distance? cause it's thin? :L lawwwl,

And the fact that it had vessels so xylem carried water and nutrients.

For question 5 though omg!!!!

totally messed up on triplet, degenerate, non-overlapping. :frown:

Reply 597

username1054067

Original post by HQazi

Posted from TSR Mobile
Oh, I did not mention any gas exchange fir midrib. Oh well
Btw, do you happen to have unit 5 jan 2013 paper and ms? :smile:

here you go

6BI05_01_que_20130121.pdf751.1KB

6BI05_01_rms_20130307.pdf146.6KB

Reply 598

HQazi

Original post by yarshad

here you go

Posted from TSR Mobile

Thank you!
*thumbs up*

Reply 599

C94

Original post by confusedgirl22

Haha i love the way you used the ?!?!?!
as my reaction was the exact same!
I thought Unit 5 was tomorrow all of a sudden and i was gonna start having a panic attack :P

Haha yes, I thought he was referring to Unit 5.
I was scrambling through my table to find my exam timetable, just to check if it was true.

And yes, that was a panic attack, I am no where near ready for this. All revision will begin after Core 3 and Physics G495 tomorrow.