F215 - Revision thread 13th June 2011

These are my own answers based on the revision I have done with my daughter and my general knowledge of Biology (I am a University Lecturer).

Is genome sequencing the same as DNA sequencing?
Is selection pressure the same as natural selection?

A lot of respect for this
Do you have any idea about grade boundaries?

I would imagine that genome sequencing or DNA sequencing will be equally acceptable for a mark.

I do not think that selection pressure and natural selection are equivalent. One brings about the other. Selection pressure (eg environmental pressure on a trait) brings about the natural selection of better adapted organisms.

Is genome sequencing the same as DNA sequencing?
Is selection pressure the same as natural selection?

That unoffical mark scheme has cheered me up immensely!
I count about 57... so B?

its only a small thing compared to my maths fail today which means the result of this doesnt matter anyway for my uni chances as it is now completely impossible but one less resit next year I guess

That's good! I got 50 after looking at the mark scheme Good luck for next yeaR

what about DNA probe?

what do you think the grade boundaries might be?

around 65 for an A?

because the way I see it, this paper probably gives an advantage to those biologists who also do geography and / psychology, which could bring up the grade boundaries

I would imagine that genome sequencing or DNA sequencing will be equally acceptable for a mark.

I do not think that selection pressure and natural selection are equivalent. One brings about the other. Selection pressure (eg environmental pressure on a trait) brings about the natural selection of better adapted organisms.

Instead of DNA sequencing i Automated sequencing, is it still correct?

What about Electrophoresis?

Electrophoresis is used to separate DNA fragments according to size. It does not give enough information to show that all Elm trees are genetically identical (ie clones). If you said sequencing electrophoresis (the way sequencing used to be done before automated DNA sequencing) you might get the mark.

But if you were able to get DNA fragments and seperate them by size - you could view the band patterns to determine if they were clones or not - because the DNA would have similar bands when placed under a nylon sheet, etcetc.