2015 Biology Exam PDF and Suggested Solutions

[Bruzzix]

Thank you for all your feedback, I have changed the answer for 38 from D to C.

[wobblywobbly]

Guys chill out. The exam seems much harder than last year and I got a 39/40 for the MC, so you would be expected to make a bit more mistakes (I know I did going through it). Looking with the answers, they seem all right, but a bit iffy with the hominoids question (I've forgotten what the definitions of the different human evolution terms are...)

[bridgetkelly123]

Got 39/40, which I'm fine with. 22 was the only one I got wrong, and I really couldn't figure that one out so was expecting it. I normally get 30-35 so I suppose it'll help me out a bit with my epic fail on SA....

 

[cosine]

can someone go over 24 i am still in denial.. (I said C) and also 39 (I said D)

[Gromekk]

can someone go over 24 i am still in denial.. (I said C) and also 39 (I said D)

39 definitely isnt D, not everyone will have access to the screening and even if they did not everyone will get screened, so the allele will probably not get completely wiped out

[heids]

can someone go over 24 i am still in denial.. (I said C) and also 39 (I said D)

Why would two species have identical genomes?  If they did, they wouldn't be separate species... (Q24)

[plants]

Can someone go over multiple choice q22? Not all the cells after image 10 are haploid because only one division has occurred -  only after the second division they would be haploid??

[notverygood]

I got 33/40 Is that good or bad?
Could've got more right but I overthought and rubbed out 3 correct answers UGH
All down to short answer..

[heids]

Can someone go over multiple choice q22? Not all the cells after image 10 are haploid because only one division has occurred -  only after the second division they would be haploid??

In the first division of meiosis, homologous chromosomes separate (so the cells becomes haploid as they only have one from each pair, 23 total and 46 chromatids); it's the second division that has sister chromatids separating, so unfortunately, you're not right

[BakedDwarf]

39/40...
I somehow got question 38 wrong.

[patphez]

Ahah I did exactly the same   

[Biology24123]

I got 33/40 Is that good or bad?
Could've got more right but I overthought and rubbed out 3 correct answers UGH
All down to short answer..

It's ok

[cosine]

what did you guys write about the translocated chromosome (the consequence on the genetic makeup of daughter cells)?

I said that the result of meiosis I (as crossing over happens during meiosis I) will result in non-identical sister chromatids in the daughters cells, something like this. Is this correct? I am so unconfident about this one

[Bruzzix]

what did you guys write about the translocated chromosome (the consequence on the genetic makeup of daughter cells)?

I said that the result of meiosis I (as crossing over happens during meiosis I) will result in non-identical sister chromatids in the daughters cells, something like this. Is this correct? I am so unconfident about this one

Have a read of the solutions

[StupidProdigy]

Can someone explain q.35 please