2016 OCR Biology A Breadth - Unofficial Mark Scheme

I got 98.5% too

I said exactly the same. Not sure if it's right too!

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It can't be 98.5% because going from 0.3 to 20.1 you would do change/initial X 100 which would be 19.8/0.3 X 100 giving you 6600

For the % change question i got 6600% at first BUT I read the question again and i'm sure it said 'calculate % change from BLOOD to PLASMA' i.e (0.3-20.1/20.1 x 100) so i did that and got (-) 98.5%

Was plasma 0.3 and blood 20.1?

For the percentage increase, it surely is 19.8% increase because the sample was out of 100cm^3 which cancels out with the 100%?? Am I right or nah

I said mineral ions are actively pumped in to the root hair to lower the water potential( so it has an even lower water potential than the soil), and as a result, water would move from the soil into the root hair from high to low water potential, not sure if it's right tho

that's what I put!! Omg I thought I was the only one

I remember some of the multiple choice questions and have checked to make sure they are correct.

The primary defence was D - blood clotting

The 3 domains was A - Archaea, Bacteria and Eukaryota

An organelle that is present in both eukaryotic and prokaryotic cells - Ribosomes (think it was C but not sure?)

Not sure if this is right but I put - high low low low for the fluid pressure question.

Not sure about the mitosis image either - I think I put metaphase??

I got 0.63 (not sure if the last digit is correct) for the chromatography question.

Athlete's foot - fungus - spreads indirectly and directly.

The hinge region for the flexibility of antigen-binding sites on the antibody diagram

Yep I got all of those the same apart from the first one

I put that the zoos could raise money and awareness for the rhinos and then maybe they could use the money to keep an eye on the rhinos and give them medical support if they need it.

Hmm I put anaphase... probably was metaphase though

for the multiple choice question, was the ventricular systole when the pressure went up or when it went down?

the one for percentage increase was 98.05% i think. bonding of two nucleotides was condensation reaction, obviously water given out. the multiple choice question about potometers, was that the tap didn't need to be open, the table for the rhino was something like, animalia, phylum, class, genus and sumatrasomething cant remember. Would i be correct if i put permanent Vacuole instead of tonoplast?