VCE Biology Exam Discussion and Solutions

[JaeSunRyoo]

I wrote the same amount of ice because it didn't mention it taking the same amount of time to cool to 10 degrees.

Hm... good point. I don't remember thinking about it that way, had a brain block in that question :/

In regards to the fauna question though, it seems like a massive giveaway of like 9 marks. Though I'm happy it was an easy slot of marks, it was quite disappointing.

That being said, the exam did feel a bit empty. Multiple choice did have a decent range, but the long answers seemed a bit... lacking.

[jaronmak]

You can say 2nd line of defence, right? That's what I said, and I'm pretty sure it falls under innate immunity...

I'm starting to feel anxious XD

uhh I’m not too sure, because the lysozymes would’ve been a physical barrier from the first line of defence

I suppose it might be ok, but I guess we’ll have to wait for Thushan’s opinion or for VCAA to put out the examiners report

[PhoenixxFire]

uhh I’m not too sure, because the lysozymes would’ve been a physical barrier from the first line of defence

I suppose it might be ok, but I guess we’ll have to wait for Thushan’s opinion or for VCAA to put out the examiners report

When does the examiner report come out? Is it before we get our results or after?

[K888]

When does the examiner report come out? Is it before we get our results or after?

From memory, it's after results. Takes a decent amount of time.
I could be wrong, though.

[LPadlan]

Depends on what exactly you wrote. Probably not. I knew straight away it was talking about exon splicing because I read it in another exam...there seemed to be lots of questions only slightly reworded from past exams.

Wouldnt it be due to being a regulatory gene? A gene that produces proteins that controls other genes?

[PhoenixxFire]

Wouldnt it be due to being a regulatory gene? A gene that produces proteins that controls other genes?

No. It talked about alternate proteins being produced. Regulatory genes make transcription factors that alter the rate of expression of a protein not the actual protein. (although I could be wrong - maybe they control exon splicing?)

[sadcats_club]

For the control question at the end I had food given and relate it to glucose level and impact on cell resp rate, as well as time of day of experiment due to different metabolism rates of the cockroach at these different times...

[JaeSunRyoo]

Regulatory genes code for repressor proteins and code for one or more other genes...

Eh..............

[jaronmak]

From memory, it's after results. Takes a decent amount of time.
I could be wrong, though.

Yeah I'm pretty sure they take a while; I did psych last year and from memory the examiner's report didn't come out until about June this year :/

[PhoenixxFire]

For the control question at the end I had food given and relate it to glucose level and impact on cell resp rate, as well as time of day of experiment due to different metabolism rates of the cockroach at these different times...

OMFG i wish I had a time machine. My brain was stuck on a loop about temperature. I wish I had thought of food.

[JaeSunRyoo]

For the control question at the end I had food given and relate it to glucose level and impact on cell resp rate, as well as time of day of experiment due to different metabolism rates of the cockroach at these different times...

It doesn't say anything about the cockroach being awake 24/7, and it did mention that the guy was trying to minimize or otherwise prevent the cockroach from being stressed. Sounds like a plausible answer, the 2nd part. Not sure what the examiners will think about it, though...

[sagisingareddy]

You can say 2nd line of defence, right? That's what I said, and I'm pretty sure it falls under innate immunity...

I'm starting to feel anxious XD

i think its innate first and second line, cuz lysozymes are first line defence

[JaeSunRyoo]

i think its innate first and second line, cuz lysozymes are first line defence

It was only mark, and the way it was asked, it seemed as if there was only one type of immunity they wanted in the answers...

¯\_(ツ)_/¯

[PhoenixxFire]

Innate is both 1st and 2nd line.

[jaronmak]

Innate system is the second line of defence. Lysozymes are part of the second line of defence

Aren't lysozymes also in our tears, which would then mean it acts as part of the first line of defence, as a chemical barrier?