Biology Exam Chat + Exam Copy + Answers (now)

[natrox14]

69 average on the exams is good enough to get a 50.... + high A+ for SAC's, you're fine rofl.

And unless you're trying to get into like, med, you can get into just about any course with a 95...

how does this work , how can you get a really high mark with 69 average?

[Panicmode]

69 average on the exams is good enough to get a 50.... + high A+ for SAC's, you're fine rofl.

And unless you're trying to get into like, med, you can get into just about any course with a 95...

how does this work , how can you get a really high mark with 69 average?

That's a 69/75 average. Not 69% lol -_-

[natrox14]

yea but still wouldnt you have to get As on everything to get an A, how does scaling work for this?

[Panicmode]

I am outraged!

5a) had to be germline cells for the HERDA to be inherited
And 5b) was autosomal recessive, because if it was X-linked recessive, then II: 1's father (1: 2) would have had to have HERDA for it to be X-linked.

I thought it was okay overall - but it was not very well written by VCAA, and I just know I've dropped some marks from stupid mistakes here and there :\

I also got autosomal recessive

You're correct.

It can't be dominant as it is inherited from two unaffected parents.

It cannot be X-linked because if it was, individual I-2 would have to be affected in order to pass it on to his daughter (who is affected by the condition) as he only has one X chromosome.

[Panicmode]

yer according to notes, stem cells are multipotent and can only give rise to certain cell times so answer D?

Yes, some stem cells are multipotent and will give rise to limited cell types. However, the question talks about stem cells in general and since it is true that stem cells appear in the 2 or 4 cell embryo, this is the assumed correct answer.

[bah-humbug]

but then only "some" stem cells are from 2 or 4 cell embryo (totipotent ones)? or am i wrong? 

[Mr. Study]

I got that embryo question right.

My school offered everyone a free breakfast before the exam. xD.

Hopefully A+ is low.

Now for one more exam.....

EDIT: Reading through these comments, I probably lost 2-4 marks on MC alone...

[Panicmode]

but then only "some" stem cells are from 2 or 4 cell embryo (totipotent ones)? or am i wrong?

Yes, but the question states, "can be obtained" not "can only be obtained" or "are obtained"

Therefore, since the other answer refers to all stem cells and this one gives a possible source, it is the correct answer. (However hopefully they'll be lenient and see the massive ambiguity in the question)

[bah-humbug]

but then only "some" stem cells are from 2 or 4 cell embryo (totipotent ones)? or am i wrong?

Yes, but the question states, "can be obtained" not "can only be obtained" or "are obtained"

Therefore, since the other answer refers to all stem cells and this one gives a possible source, it is the correct answer. (However hopefully they'll be lenient and see the massive ambiguity in the question)

but option D is " can differentiate into a limited number of cell types" i dnt see why option D is wrong. but i guess the embryo one is a better answer? lets just hoping they'll mark both as right. 

[Panicmode]

but then only "some" stem cells are from 2 or 4 cell embryo (totipotent ones)? or am i wrong?

Yes, but the question states, "can be obtained" not "can only be obtained" or "are obtained"

Therefore, since the other answer refers to all stem cells and this one gives a possible source, it is the correct answer. (However hopefully they'll be lenient and see the massive ambiguity in the question)

but option D is " can differentiate into a limited number of cell types" i dnt see why option D is wrong. but i guess the embryo one is a better answer? lets just hoping they'll mark both as right. 

Yeah, lets all hope

[Russ]

I consider both the options to be perfectly acceptable, which is why I said it was a terrible question several pages ago

[cricketstar]

what about question 1a, i put down nucleus...... what do u guys reckon is the correct answer? But i must say that was such a badly worded question

[anjie123]

Can someone please link me to the file for the exam? I cant get it from Charmz' post =/

[earlandcookie]

can somebody please explain to me the correct answer for mc Q17? would be greatly appreciated as I am tres confused!   

[Panicmode]

can somebody please explain to me the correct answer for mc Q17? would be greatly appreciated as I am tres confused!   

Answer to question 17 is A.

Since all cells are haploid, male ants must produce gametes via mitosis. Therefore, the gametes are exact clones of the parent