AQA A-Level Biology paper 2 11th June 2018 unofficial markscheme

For the yeast one where it said why do you wait an hour I said so the gas fills up the flask and gets to the tubing

There was a question about why they all had to be on the same diets and for that one I said so they had the same amount of glucose in the blood and water potential of the blood was constant so no osmoregulation would occur

For the yeast one where it said why do you wait an hour I said so the gas fills up the flask and gets to the tubing

There was a question about why they all had to be on the same diets and for that one I said so they had the same amount of glucose in the blood and water potential of the blood was constant so no osmoregulation would occur

I put that CO2 increased pressure on the left of the liquid so It pushed it to the right .

for the bacteria division question there were 84 divisions so it's 2 to the power of 83 no?

for the bacteria division question there were 84 divisions so it's 2 to the power of 83 no?

for the bacteria division question there were 84 divisions so it's 2 to the power of 83 no?

I did 2 to the power of 84:

0 divisions = 2^0 = 1 cell
1 division = 2^1 = 2 cells
2 divisions = 2^2 = 4 cells
etc
84 divisions = 2^84???

What did everyone say for the last question? About iPS and gene therapy?

I thinks it 84 because 2 to the power of 1 is 2 and that’s one division right?

What did everyone say for the last question? About iPS and gene therapy?

Um I said it was better because it could last a lifetime not two years, I said less risk because of the virus and more likely to work in humans

Um I said it was better because it could last a lifetime not two years, I said less risk because of the virus and more likely to work in humans

I did 2 to the power of 84:

0 divisions = 2^0 = 1 cell
1 division = 2^1 = 2 cells
2 divisions = 2^2 = 4 cells
etc
84 divisions = 2^84???

Hardy Weinberg
10% is a frequency of 0.1
Therefore q^2=0.1
Therefore q= sqrt of 0.1

p^2 + 2pq + q^2=1

Sub in values of q and q^2 and figure out what p is. I personally used the quadratic formula and rounded the answer up to 0.68. Then the answer is 2 times your answer of p multiplied by q.
So 2pq= 2*0.68*sqrt of 0.1
=0.43...
=43%

Gene therapy on monkeys only lasted 2 years and talked about ethical issues with testing on animals whereas ips could have longer lasting results and can be made more specific

for the bacteria division question there were 84 divisions so it's 2 to the power of 83 no?

Not 100% sure on this but I think it said the allele frequency was 0.1 which means you use p + q = 1 to get p and q and then put that in 2pq so the answer was 18?
I may be wrong though