VCE Biology Exam Discussion and Solutions

[PhoenixxFire]

I said there might not be a treatment and it may reveal information about a trait the parents carry (ie. something like huntingtons which is not expressed phenotypically until later in life.)

[LifeisaConstantStruggle]

I word-vomited all this Chemistry 3/4 stuff cus I had no idea what the 3 marks were for.
- Condensation reaction where amine group of amino acid joined with carboxyl group of another amino acid.
- H2O molecule removed
- Resulting bond is peptide bond which is a covalent bond
Woohoo I said exact same thing.

Oo damn same. But because it said "join amino acids together" and I didn't know how many so I included  "the repetition of the same reaction called condensation polymerisation occurs" just in case.

[PhoenixxFire]

I think they might be talking about the "Hygiene" approach question concerning the MS context. The question was like "What can you understand/infer from this block of text?" The answer I put down was something like being exposed to this bacterial infection will help against MS or something, time to look at the screenshots that have been put up...

Ohhh the multi choice one about the 30% thing in people who had been infected with the bacteria as a child

[JaeSunRyoo]

Yeah, Q25 on the MC, I think I put down D since it made the most sense to me.

[LifeisaConstantStruggle]

Not too sure about abortion, as it is indeed a newborn...

I said privacy of the information obtained (insurance company, future employer etc.) and the baby not consenting to the test? violation of bodily autonomy? idk... i kinda winged the second one.

Oo I wrote "inducing emotional stress to the parent/child should a positive test for a genetic disease is examined"or something along the lines of it, not sure tho.

[PhoenixxFire]

Yeah, Q25 on the MC, I think I put down D since it made the most sense to me.

Thats what I picked

[rainbowsparkles15]

Ahh good to see some other non-transgenic answers!

Also I had NO IDEA on MC q24 about multiple sclerosis and what they would find in tissue...I think I guessed Th cells in the spinal fluid
What did you guys put?

Same here

[James Holgate]

•For genetic screening implications I put;
  -Will be discriminated against by health insurance company if person has genetic disease susceptibility
  -People won’t want to have kids with the person as their offspring could have the disease—>this reduces the genetic diversity in the population

Edit: here’s q24
Multiple sclerosis is an autoimmune disease. In sufferers of MS, the myelin coating of a nerve cell axons us damaged. This damage results in poor transmissiln of nerve messages between the brain, spinal chord and the rest of the body. One aspect of MS diagnosis is imaging the brain to detect visible areas of demylenation, called plaques.

•Researchers investingating MS have analysed various tissue samples from patients, in these samples they would expect to find;
A—An abundance of allergens in nerve cells
B—Cancer cells in MS plaques in brain tissue
C—Increased numbers of T helper cells in spinal fluid
D—An absence of T cytotoxic cells in the spinal chord and brian


.....I picked C at a guess

[neenah]

Wait for mcq40, D was the first option I ruled out but now I'm starting to doubt my answer. I'm pretty sure I remember the actual question is what lead me to rule out D

And for the amino acid question I said the same thing about a condesnation reaction and the amine group and the carboxylic group joining together to form a covalent bond (peptide bond) and water (I used H2O in the exam since VCAA looove repeating every year that students should be more confident using abbreviations) being a by product. And for the abortion thing, well just great. I swear time was scaring me so much I hope I can get used to time managment in year 12

[LifeisaConstantStruggle]

•The MS question was q24 of multiple choice
•For genetic screening implications I put;
  -Will be discriminated against by health insurance company if person has genetic disease susceptibility
  -People won’t want to have kids with the person as their offspring could have the disease—>this reduces the genetic diversity in the population

Not sure about the second one you wrote(?) As it is the genetic screening of newborn babies so the baby has been born before genetic screening.

[rainbowsparkles15]

•The MS question was q24 of multiple choice
•For genetic screening implications I put;
  -Will be discriminated against by health insurance company if person has genetic disease susceptibility
  -People won’t want to have kids with the person as their offspring could have the disease—>this reduces the genetic diversity in the population

Glad someone else said the health insurance discrimination too, I was worried it was social and not ethical. I also said the newborn cannot provide its own consent regarding testing (pretty sure this was an answer on last years exam for the back page but could be wrong haha)

[PhoenixxFire]

Wait for mcq40, D was the first option I ruled out but now I'm starting to doubt my answer. I'm pretty sure I remember the actual question is what lead me to rule out D

And for the amino acid question I said the same thing about a condesnation reaction and the amine group and the carboxylic group joining together to form a covalent bond (peptide bond) and water (I used H2O in the exam since VCAA looove repeating every year that students should be more confident using abbreviations) being a by product. And for the abortion thing, well just great. I swear time was scaring me so much I hope I can get used to time managment in year 12

D was definitely wrong. It stated that the organism was transgenic but the stem clearly stated that its DNA did not change

[ardria]

I wrote about that and I don't do chem

I'm not too sure about what people have said about describing translation, cus it said the "reaction" that joins 2 amino acids and I don't think that would be asking for translation.


Also, I'm now totally convinced that the transgenic answer was wrong for MCQ40 haha. Didn't realise transgenic had to involve the genome!


I totally missed that the genetic screening question said "ethical implications", and one of my answers was that genetic screening could have negative health effects that are not known, whether they short-term or long-term. Could this be considered an ethical implication or would it just be wrong?
My other answer was that it causes emotional distress to parents, possibly leading to depression.

[vox nihili]

1   A
2   B
3   D
4   C
5   B
6   C
7   C
8   D
9   A
10   C

[James Holgate]

Not sure about the second one you wrote(?) As it is the genetic screening of newborn babies so the baby has been born before genetic screening.

Nah like the baby’s future kids might have the disease so nobody will want to breed with the baby when it grows up is what I meant......I hope the examiners can see that lol