AS Biology Paper 1 2017 AQA UNOFFICIAL MARK SCHEME

Same, but a friend noted that we should have multiplied it by 2^3 not 2, because it's cm^3...

Question on excercise.
No of mitochondria decreased insignificantly, but area of Cristal inside increased significNtly (s.d.s did not overlap.)
Mitochondria - site of earobic respiration. Synthesises atp.

No the units were cm^3 in the table and the answer?? I'm pretty sure I double checked that haha I think we did it right? Not sure?

Didnt the sd overlap for the table about number decreasing ?

Volume of blood, I got 18000

Wasn't the type of bond just an ester bond? Because a phosphodiester bond is for two successive sugars and the arrow was just pointing at one bond.

Number of nucleotides: I got 8

Reason for the anomaly at 0.8moldm3: I said the final mass to initial mass ratio was too high as the point was above my curve, and so the final mass recorded was too high, and that maybe he didn't dry the chip properly to get all the water out so the final mass was too high.

The haploid number was 6 I think but I put 3 for some reason.

DNA Helicase breaks the hydrogen bonds between base pairs which seperates the bases leaving them exposed

DNA Polymerase: joins the nucleotides together in the 3' to 5' direction forming a polynucleotide strand.

its phosphodiester

In no particular order:
Circle the group that's the same for all a.a. Circle (C, NH3, COOH, H)
What crossing over was, and how it increased genetic diversity.
No of haploid chromosomes in cell.
When does meiosis happen in some shrub.
Mode genetic diversity - 5 I think
Majority of fish are from sample A, a student concluded tat that sample is most diverse, why can't we make this conclusion.
Use the info above to answer the following: two benefits of HAART; why is azt(?) linked with muscle wastage;
Benefits of lipid droplets and micelles.
Name the thing and what it does. I put Golgi (might be smooth er) , packages into vesicles for exocytosis.
Purpose of DNA helicase, and then DNA polymerase.

its phosphodiester

That first question was so stupid because they all remain the same apart from the R group and I didn't know how to draw the box so I just drew it around H ugh stupid loss of mark there...

Also wasn't the mode genetic diversity 14? Because that's were it went the highest?

Yeah I put Golgi too and smooth ER doesn't have vesicles does it? So I agree!!

A phosphodiester bond consists of 2 ester bonds and a phosphate group,the arrows was only pointing to one bond.

That first question was so stupid because they all remain the same apart from the R group and I didn't know how to draw the box so I just drew it around H ugh stupid loss of mark there...

Also wasn't the mode genetic diversity 14? Because that's were it went the highest?

Yeah I put Golgi too and smooth ER doesn't have vesicles does it? So I agree!!

That first question was so stupid because they all remain the same apart from the R group and I didn't know how to draw the box so I just drew it around H ugh stupid loss of mark there...

Also wasn't the mode genetic diversity 14? Because that's were it went the highest?

Yeah I put Golgi too and smooth ER doesn't have vesicles does it? So I agree!!

It's the endoplasmic reticulum and I remember back in primary school 'mode' meant most popular, so the value that appeared the most which was 5. It's stupid how they asked that though... they expect you to remember that from ages ago because I'm sure I didn't see it on the specification.

I'm sure they will allow both on mark scheme considering ester is right but also the fact that it was a polynucleotide? They can't be that harsh surely... Well they can haha