I agree now you've explained it, shame but hopefully it won't cost me the A! I've definitely got 40 marks (according to your ms) and then theres some ambiguity about another 5 or so. You sure sound like you're in the running for full UMS (or close to it), fingers crossed!

You'll be fine :smile:

Grade boundaries are probably pretty low or average for this paper, and even so it's only 30% of the grade. And I highly doubt it! I buggered up a couple of the 1-markers (position of xylem in midrib grr) and I think I was too vague on some of the descriptions, but I'm hoping for an A. Nobody's told me if fructose is an assimilate in phloem yet...

Original post by Gdegtyareva

Was the DIF.DIF in the slime mould question not an example of communication between cells? It's a signalling molecule right?

I think DIF would also get the marks, yes.

Original post by bellend1

Does anyone remember what the asexual reproduction question was for the Grex?

I put budding as my answer but everyone else has put mitosis.

It's mitosis. Budding is just for yeast...

Original post by PensiveChicken

I thought budding was just yeast? I put binary fission; not sure if I got the marks on that one...

...and binary fission is just for bacteria. Plus I think they said 'kind of cell division'.

Original post by Joseph.S

I got 17 hours?

You are correct.

Reply 107

username1042689

OP

21

Original post by coffeebean1

Would I get a mark if I said homologous chromosome for the last question? Thanks

Ambiguous. Depends on how bitchy the OCR mark scheme is feeling. They might insist on the plural. Still, you've got the key word in there, so you've got a shot.

Reply 108

coffeebean1

Original post by paradoxicalme

Ambiguous. Depends on how bitchy the OCR mark scheme is feeling. They might insist on the plural. Still, you've got the key word in there, so you've got a shot.

Thanks, hopefully I get a nice examiner

Reply 109

diseasedneckbeard

9

Original post by paradoxicalme

It's mitosis. Budding is just for yeast...

Shame.

Apparantly the way to work out raw mark boundary for full UMS is to find the difference between the boundary for an A and the boundary for a B, double it and add it to the boundary for an A. In that case, assuming standard grade boundaries, hopefully full UMS (which I'm shooting for) comes out to around 55 raw marks. You might want to add that information to the OP.

(edited 9 years ago)

Reply 110

Roadie5t

If I said air moves into the bell jar down the concentration gradient rather than pressure gradient will that still get the marks?

Reply 111

joejoejoejoe

2

So, I have 32/40 in the ISA and here I think I got 48/60.

What do you guys think the grade boundary for this paper will be???

Reply 112

matthewoods32

Instead of homologous pair, I put sister chromatids, I assume that's wrong?

Reply 113

sam4xx

Original post by paradoxicalme

It's debatable. Some say no, some say there is evidence that they do. It seems like one of those that the mark scheme would accept, because of the ambiguity, but centrioles is a much safer choice.

I don't understand the pressure differences for the balloon? I think I said there is a higher pressure in the surrounding air in the jar and it will move down the pressure gradient where it's low pressure in the balloon. (Because the thorax drops to below atmospheric pressure and the volume increases during inspiration)

Reply 114

amazopurpleducks

Well its reassuring to see I got the same for the most part. I think for the assimilates question (you said amino acids definitely), they won't allow glucose/maltose/fructose. The main sugar transported is sucrose, and what I've seen from mark schemes is that they will credit "sugars" but often "ignore" other specific examples like that.

Reply 115

amazopurpleducks

Original post by joejoejoejoe

So, I have 32/40 in the ISA and here I think I got 48/60.

What do you guys think the grade boundary for this paper will be???

I reckon it'll be higher than past ones, because I think it was quite easy. I reckon 45/46 for an A?

Reply 116

joejoejoejoe

2

Original post by amazopurpleducks

I reckon it'll be higher than past ones, because I think it was quite easy. I reckon 45/46 for an A?

So do you think with those two scores, all I need is an A in unit 2 and I will have an A overall???

Reply 117

Jack873

Original post by bellend1

Does anyone remember what the asexual reproduction question was for the Grex?

I put budding as my answer but everyone else has put mitosis.

I also but budding. I'm not entirely sure but it was a single celled organism that reproduced asexually. As it was an apply your knowledge question rather than an organism like yeast that we had studied, I don't believe there was enough evidence to definitively prove the answer wasn't budding so my guess is that there might be an 'ACCEPT budding' mark on the right of the mark scheme.

Reply 118

Marcooo96

I think I put Apoplast instead of Apoplast Pathway , but I think the question stated which pathway so do you think I will still get the mark ? And same with homologous I didn't put pair.

Reply 119

joejoejoejoe

2

Original post by Marcooo96

I think I put Apoplast instead of Apoplast Pathway , but I think the question stated which pathway so do you think I will still get the mark ? And same with homologous I didn't put pair.

You will get both marks for that I would imagine

OCR AS Biology F211 - Unofficial Mark Scheme

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