OCR F211/F212 AS Biology Retake 2016

How would it haemloyse if it doesnt have haemoglobin?

What was the size of the artery?
Think I may have got it wrong... 117?

What was the size of the artery?
Think I may have got it wrong... 117?

Here's my answers to a few peoples questions

Why doesn't the Amoeba have a transport system, o said it has large surface area to volume ratio therefore diffusion alone is adequate

Other uses of the plasma membrane of the Amoeba, i said communication with other Amoebas and cell signalling/receptor sites to detect food and nutrient availability.

KLM - most of the people in my school got right atria, septum and wall of left ventricle
Pretty much all of us put a line just below the atria going horizontally, not slanted, if you look at a diagram of heart it's tilted.

With regards to the name given to water moving out of the cell I don't think exocytosis alone would cut it. I think it should exoPINOcytosis - refer to the bottom of page 25 in the ocr purple text book.
As it's the bulk movement of water out of the cell

With regards to the movement of water up the moss plant you can't refer to the transpiration pull , capillary action or xylem itself because it said the plant had no vascular tissues. I talked about water potential, osmosis and root pressure.

125micrometres for the size of the artery

For the question about having no vacuole I said the Amoeba would keep talking up water and the cell would burst ...

C was the leaf adapted to living in the conditions they described as it had a small surface area to reduce water loss

Other adaptations : loads for this I just said densely packed spongy mesophyll ...

Translocation: movement of (named) assimilates up and down the plant by mass flow (probably other marking points here, eg mention of phloem, source, sink etc)

How air movement and wind changes increases rate of transpiration.

Air carries water vapour that has been lost from the leaves. This ensures that the Water vapour potential from the intracellular spaces to the outside of the leaf is high, which increases the rate of diffusion

I personally thought it was difficult to differentiate between the insert showing telophase or anaphase. Although i think if you put telophase or anaphase it won't affect the marks in the 5marker later on.

That 3 marker about what else happens other than mitosis, I put interphase consisting of the s phase, DNA replication , G1 phase biosynthesis of organelles or proteins , g2 phase growth organelles

Sorry they're out of order but just seeing what I can remember

your fine i got that along with everyone else in my class

Cheers bro, thought it was a good paper... Last question took me a while but got it in the end I think....
Did you get DABE for the heart question?

what was the answer for the question asking what other feature does stem cells have and the specialised cell don't?

what was the answer for the question asking what other feature does stem cells have and the specialised cell don't?

what was the answer for the question asking what other feature does stem cells have and the specialised cell don't?

i put that they have every organelle, bc in differentiated cells a lot of them dont have certain organelles, eg rbc's dont have mitochondria or a nucleus

I got BADE

Pretty sure you're wrong. Cell bursting in animal cells are always haemolysed

check my reply to the guy, i think you got a bit confused there.

Cheers bro, thought it was a good paper... Last question took me a while but got it in the end I think....
Did you get DABE for the heart question?

Stem cells are able to specialise into many types of cells where as specialised cells can only divide into genetically identical copies of them selves.