Year 12s: what will be the first way you research your future options? >>

OCR Biology F211 resit - 16th May

Scroll to see replies

What did people do for the Question on Adaptation of cells and tissues, for efficient Gaseous exchange. I didn't know weather to write about Alveoli or Goblet Cell/Ciliated Cell. I had No Clue what to write on that question!

-capillaries narrow, so cells come single file and are close to endothelium, maximising diffusion
-capillaries once cell thin, so shortened diffusion distance
-alveolar wall one cell thin, so shortened diffusion distance
-millions of alveoli, so more surface area
-constant breathing and blood supply, which maintains the concentration gradiant

I think you might have been able to have double circulatory system, but maybe not, as fish don't have that. There were other things, I forget them now.

Then I did some stuff specifically on humans, like cartilage, elastic fibres, smooth muscle etc, though I don't think that bit's relevant now.

Reply 201

Amodeus

Original post by chingchong

How did everyone find the coursework out of 40? Hopefully grade boundary goes down for that as well

Nah it barely ever changed i dont think

Past 2 years the A boundary was 33 and 34,
B boundary is 29
Then C boundary is like 24 or something

I got 33 in it :frown:

hopefully that'll scrape an A

Reply 202

zackhere4

what did you guys write for the question on why the meristem cells were stained?
It was a 3 mark question!

Reply 203

Straight up G

Original post by Amodeus

Nah it barely ever changed i dont think

Past 2 years the A boundary was 33 and 34,
B boundary is 29
Then C boundary is like 24 or something

I got 33 in it :frown:

hopefully that'll scrape an A

I got 32, I've been told that's the A boundary?

Really crap performance from me really, it was a piss easy ISA.

Reply 204

Straight up G

Original post by zackhere4

what did you guys write for the question on why the meristem cells were stained?
It was a 3 mark question!

Nah 2 I think

Reply 205

Amodeus

Original post by zackhere4

what did you guys write for the question on why the meristem cells were stained?
It was a 3 mark question!

-Increases contrast so you can identify the cells more easily
-See organelles inside the cell (eg nucleus)
-Lets you see the chromosomes, so you can follow the stages of mitosis

Harmony... Same!!

Original post by mmsalvatore

I just wrote about Alveoli and 1 Sentence on Squamous cells. I doubt I will get the 5 marks!

Hey guys. When did you all sit this exam?

Reply 208

mmsalvatore

Original post by OpTic Predator

Hey guys. When did you all sit this exam?

Today Morning.

Reply 209

Straight up G

Original post by Amodeus

-Increases contrast so you can identify the cells more easily
-See organelles inside the cell (eg nucleus)
-Lets you see the chromosomes, so you can follow the stages of mitosis

You sure about this?

Reply 210

Wakefield

what did people get for the calculation of the cells that were in nuclear division? i got 18.00% but i dont know if all the parts were actual stages of nuclear division

Reply 211

Amodeus

Original post by Straight up G

You sure about this?

Yeah i think so, thats pretty much what came up in the mark scheme for another similar question

Reply 212

mmsalvatore

What was your answers on the question about where meristems can be found.

Reply 213

zackhere4

I put cambium and roots, don't think thats right.

Reply 214

God Help Me

Original post by Niki_girl

Are we allowed to discuss the exam yet? :confused:

I'm always scared of getting banned :s-smilie:

Anyway, I thought it was a strange paper, didn't go particularly well, or particularly bad, but a lot of stuff I revised didn't come up :frown:

kinda disappointed...

I totally agree. I was so annoyed :/
I spent ages on some topics and NOTHING came up

Reply 215

Tiffany

what did you guys write for:
what is active transport?
give two examples of active transport?
what is the role of nuclear pores?
what is used as a transport medium, to maintain pressure and an exchange surface?
how do you use a spirometer to measure vital capacity?
what did you draw for the spirometer?
how could you use a spirometer to measure breathing rate?
what risks do you have to consider when using a spirometer?
why do the atrioventricular valves close?
describe the loading of assimilates into phloem?
how are seive elements adapted?
what is the importance of staining chromosomes?
what is the difference between mitosis and meiosis?
which ones did you write for source, sink or neither?
where are meristem cells found?
what was the second question in the paper on?
thanks!!!

Reply 216

DarkSunshine

Original post by mmsalvatore

What was your answers on the question about where meristems can be found.

Roots and stem.

did it ask for which organ?

Reply 217

DarkSunshine

Original post by lolo_uk

i got 39/40 which is an A :smile:

LOL, notice you got neg-rep for getting almost full marks..
gave you a thumbs up, (Y)

28/40.. I think i can manage an A with the f211 and f212 papers