Biology Exam: Answers and Discussion!

[Reus]

I just said;
- creat two large groups where one is the control - with lys.
- insert polypeptide in the nucleated gene; record accumulation activity.
- if there is accumulation with group 1 and not with group 2 then the hypothesis is supported.

[cypherax]

- insert polypeptide in the nucleated gene; record accumulation activity.

What? You mean cell?

[dankfrank420]

Almost said 'use gene probes', gosh that was tricky.
Also the question about amino acid differences, you (probably) had to relate that to mutations in DNA since amino acids cannot just change by themselves. Thought that was sneaky too.

Are you sure?

I just thought that you had to explain that we know what rate they mutate at, hence we can derive molecular clock. More changes in amino acid = more mutations = more time since species divergence = more unrelated two species are.

[auds]

I just said;
- creat two large groups where one is the control - with lys.
- insert polypeptide in the nucleated gene; record accumulation activity.
- if there is accumulation with group 1 and not with group 2 then the hypothesis is supported.

This is EXACTLY what I wrote down, haha.

[Reus]

What? You mean cell?

Yes cell haha

This is EXACTLY what I wrote down, haha.

Let's hope we're right

[cypherax]

Are you sure?

I just thought that you had to explain that we know what rate they mutate at, hence we can derive molecular clock. More changes in amino acid = more mutations = more time since species divergence = more unrelated two species are.

Essentially yes, but amino acids cannot mutate, so unless you relate it to DNA I can't see how the argument makes sense

[vox nihili]

I've attached the exam to the first post (from Stick). Have had a look through milica96's answers. Let's just say she's a gun and a half—they're all correct in my opinion.

[dankfrank420]

Essentially yes, but amino acids cannot mutate, so unless you relate it to DNA I can't see how the argument makes sense

Hmm, I see but I've honestly never seen that sort of stuff come up before in a VCAA exam.

I think that might be too indepth for a 2 mark question, but hey you never know.

[katiesaliba]

I completed butchered the experimental design question  I initially wrote two groups but then changed it and wrote 8 groups of cells LOL 1-7 inserted with polypeptide chains that had lys in different positions and the 8th group without any polypeptide inserted. Then I mentioned how the results should show that only the group of cells which had a polypeptide inserted with lys in the position it needed to be in (2nd or 3rd? don't remember ahah) would show accumulation, thus proving the scientist's hypothesis. I also had like repetition and whatnot...just ahh, so annoyed at myself 

[dankfrank420]

I completed butchered the experimental design question  I initially wrote two groups but then changed it and wrote 8 groups of cells LOL 1-7 inserted with polypeptide chains that had lys in different positions and the 8th group without any polypeptide inserted. Then I mentioned how the results should show that only the group of cells which had a polypeptide inserted with lys in the position it needed to be in (2nd or 3rd? don't remember ahah) would show accumulation, thus proving the scientist's hypothesis. I also had like repetition and whatnot...just ahh, so annoyed at myself 

Don't worry, as long as you've included relevant info you can still get the marks

[katiesaliba]

Don't worry, as long as you've included relevant info you can still get the marks

Really?? Massive relief! Thanks

[anat0my]

Tbh the exam looks easy once you look back on it. Feeling somewhat downtrodden for loosing marks that were so easy to gain. All a matter of the moment I suppose.

[doher109]

I agree with the solutions posted, except question 20.

I put down C, but is that correct for Meiosis instead?

[katiesaliba]

40/40 on MC. What even. 

[dankfrank420]

I agree with the solutions posted, except question 20.

I put down C, but is that correct for Meiosis instead?

Yeah correct for meiosis but question was about mitosis