• Best of luck to the class of 2024 for their HSC exams. You got this!
    Let us know your thoughts on the HSC exams here
  • YOU can help the next generation of students in the community!
    Share your trial papers and notes on our Notes & Resources page
MedVision ad

General Thoughts: Biology (1 Viewer)

jensymalone

New Member
Joined
Aug 13, 2011
Messages
3
Gender
Female
HSC
2011
Overall i found the test relatively esay, although the mutliple choice were particuarly challenging (if anyone has the answers that would be great). I was a bit annoyed with the hearing question whiched asked for three different types of mammals - i had researched 3 animals, but only one of them was mammal. I was also underprepared for the DNA structure question but i think i managed to BS enough to get 3 marks.
 

OmmU

★ BoS Deity ★
Joined
Jan 21, 2011
Messages
404
Location
Middleofnowhere
Gender
Male
HSC
2011
Uni Grad
2017
Re: 2011 HSC Biology Paper

if its B and b, then the kids would be BB, Bb, Bb and bb, as seen in the diagram..
however conventionally different sized letters relate to a dominant/recessive trait.
Therefore BB, Bb and Bb were also display the same phenotype - but if you look at the pedigree, this is not supported, thus its D, in which the traits are AB - and thus co dominant.
That, I almost put A but realised the parents had to have the same genotype xD Silly me :p Good thing I picked it up though.
 

Dylanamali

Active Member
Joined
Jul 7, 2009
Messages
1,248
Gender
Male
HSC
2011
My friend, who was sitting in front of me (annoying the shit out of me with all the extra booklets he used. I only used 4) probably got 17 in MC, full marks in the rest. He has Economics now too. State rank right there.
wtf how many extra booklets =/,
do you guys right big or what..
i ended up using 3 extra booklets.
do you write on the whole page of the space for the answers, or do you only write on the lines provided?
 

1981Grant

Member
Joined
Aug 7, 2011
Messages
121
Location
NSW
Gender
Male
HSC
2011
gg state rank, right here.
top 10 school?
Yeah, we're ranked 7th at the moment. I don't know if we'll go up and down after this year though. I might have lost more for core though, just depends how hard the marker is, even though my answers were pretty much solid for everything.

I definitely won't get a state ranking though, there's people so much better than me at my school. I was ranked 5/55ish at the start of the year but had to ease off to fix up my other subjects.
 
Last edited:

m-swan

New Member
Joined
Sep 10, 2010
Messages
27
Location
Sydney
Gender
Female
HSC
2011
Uni Grad
2014
SAME! i thought it was a trick so i put b-cells but i dono it just confused m :/
 

piraterawr

New Member
Joined
May 11, 2011
Messages
5
Gender
Female
HSC
N/A
MC Q17. Why D? C seems more correct to me because of the use of both capitals, showing dominant, and lowercase showing recessive. Instead of D in which both parents were heterozygous with two dominent genes? Very similar answers though. Just want to know why D was picked. Other than that 18-19/20.
 

Riproot

Addiction Psychiatrist
Joined
Nov 10, 2009
Messages
8,228
Location
I don’t see how that’s any of your business…
Gender
Male
HSC
2011
Uni Grad
2017
Overall i found the test relatively esay, although the mutliple choice were particuarly challenging (if anyone has the answers that would be great). I was a bit annoyed with the hearing question whiched asked for three different types of mammals - i had researched 3 animals, but only one of them was mammal. I was also underprepared for the DNA structure question but i think i managed to BS enough to get 3 marks.
Check 2nd post in this thread. Two answers are wrong.
Yeah, I made my animals up on the spot. :/

wtf how many extra booklets =/,
do you guys right big or what..
i ended up using 3 extra booklets.
do you write on the whole page of the space for the answers, or do you only write on the lines provided?
He writes normal sized and I write a bit bigger but I would've needed the extra room regardless.
I did half a page extra for a few 2-3 markers, 2.5 pages extra for the 7 marker in Section I B and 3 extra pages for the communication 7 marker
 

Riproot

Addiction Psychiatrist
Joined
Nov 10, 2009
Messages
8,228
Location
I don’t see how that’s any of your business…
Gender
Male
HSC
2011
Uni Grad
2017
MC Q17. Why D? C seems more correct to me because of the use of both capitals, showing dominant, and lowercase showing recessive. Instead of D in which both parents were heterozygous with two dominent genes? Very similar answers though. Just want to know why D was picked. Other than that 18-19/20.
Co-Dominance. That's why there are three separate phenotypes.
 

caityj

New Member
Joined
Jun 20, 2011
Messages
1
Gender
Female
HSC
2011
The MC killed me, which was disappointing because I've been getting 19/20 on most practice papers. I think I got 15/20.

I said the reptile study was inaccurate because it didn't take into account behavioural adaptations (basking in sun in morning/afternoon and shade in the middle of the day, etc) as they were locked in small cages, would that get me marks?

Also I had no idea about the number for sound so I talked about the different habits and different structures for hearing and how hearing was used, how many marks do you think I'll lose for that?
 

Dylanamali

Active Member
Joined
Jul 7, 2009
Messages
1,248
Gender
Male
HSC
2011
Check 2nd post in this thread. Two answers are wrong.
Yeah, I made my animals up on the spot. :/

He writes normal sized and I write a bit bigger but I would've needed the extra room regardless.
I did half a page extra for a few 2-3 markers, 2.5 pages extra for the 7 marker in Section I B and 3 extra pages for the communication 7 marker
wow 1 page, for a 2/3 marker.. overkill much? hahaha :p
nah it's good.. others in my class finished with like an hour to spare.. I ended up finishing just as the examiner said put pens down, coz I wrote so much.
 

Dylanamali

Active Member
Joined
Jul 7, 2009
Messages
1,248
Gender
Male
HSC
2011
The MC killed me, which was disappointing because I've been getting 19/20 on most practice papers. I think I got 15/20.

I said the reptile study was inaccurate because it didn't take into account behavioural adaptations (basking in sun in morning/afternoon and shade in the middle of the day, etc) as they were locked in small cages, would that get me marks?

Also I had no idea about the number for sound so I talked about the different habits and different structures for hearing and how hearing was used, how many marks do you think I'll lose for that?
3 for the values/ranges, 3 for the reasons + comparison
 

snorelacks

Member
Joined
Aug 6, 2011
Messages
53
Gender
Female
HSC
2011
With the MC, is killer T cells same as cytotoxic T cells? I mean the way I learnt it at school we called it killer T...
 

damo_g

Member
Joined
Oct 21, 2011
Messages
92
Gender
Male
HSC
2011
MC Q17. Why D? C seems more correct to me because of the use of both capitals, showing dominant, and lowercase showing recessive. Instead of D in which both parents were heterozygous with two dominent genes? Very similar answers though. Just want to know why D was picked. Other than that 18-19/20.
There were 3 phenotypes in the next generation. C only showed two possible phenotypes where D showed 3.
 

nephh22

Member
Joined
May 19, 2011
Messages
125
Gender
Male
HSC
2011
Re: 2011 HSC Biology Paper

Multiple Choice: http://sixpop.com/files/21/Bio MC.pdf
MC Q10 -12: http://sixpop.com/files/21/photo 1.JPG
& Q16-17: http://sixpop.com/files/21/photo 2.JPG

They were my answers so don't rely on them :haha: Sorry for the poor quality.

Options: http://sixpop.com/files/21/Bio Options.pdf

Again not great quality, if someone scans them then please post the link xD
according to ur answers, i got 17/20 for multiple choice... question 8 - please explain to me the difference between killer T and cytotoxic T cells: i thought they were the same >_<
 

Riproot

Addiction Psychiatrist
Joined
Nov 10, 2009
Messages
8,228
Location
I don’t see how that’s any of your business…
Gender
Male
HSC
2011
Uni Grad
2017
Re: 2011 HSC Biology Paper

you seem to have done preety well in MC's riproot IMO 18/20, according to my results, but maybe 17/20 according to others..
I think question 8 was a little dodgy.. asking students to differentiate between killer T cells and cytotoxic T cells..
SO DID I!
And the fucking structure one... I fucking knew it! I looked at my notes just before I went in, and I was like, nahhhh it has to be more specific, and there are way too many Bs. :/
 

piraterawr

New Member
Joined
May 11, 2011
Messages
5
Gender
Female
HSC
N/A
Co-Dominance. That's why there are three separate phenotypes.
There were also three results for C, though. 25%:50%:25% for both C and D. Plus, you wouldn't be able to tell whether A and B in D were co-dominant or anything, so it could be wrong to just assume they mean AB was co-domiant because we weren't told information like that. Also, I figured with co-domiance, the 'tree' we were given would have shown similarities if that was the case instead of being completely different in colour/whatever. But IDK. I hate those things. Edit: Ah, wait, I can see it now. Bb would have showed the same characteristics as BB. -facepalm-
 

1981Grant

Member
Joined
Aug 7, 2011
Messages
121
Location
NSW
Gender
Male
HSC
2011
MC Q17. Why D? C seems more correct to me because of the use of both capitals, showing dominant, and lowercase showing recessive. Instead of D in which both parents were heterozygous with two dominent genes? Very similar answers though. Just want to know why D was picked. Other than that 18-19/20.
D is correct because you needed to realise that the cross was co dominant. You would have realised the codominance as there was three different phenotypes (not three different genotypes), the capital letters represented dominant genes. The co-dominance result in three different phenotypes that way: AA, AB, BB
 

piraterawr

New Member
Joined
May 11, 2011
Messages
5
Gender
Female
HSC
N/A
Then, 18/20 for MC. Messed up killer/cytotoxic and the damn tree. :C Think I lost 4 - 5 marks in Section 2. And thinking 1 mark at the most in Communication. I'm all good.
 

bigbirdbanana

Member
Joined
Sep 27, 2009
Messages
83
Gender
Female
HSC
2011
There were also three results for C, though. 25%:50%:25% for both C and D. Plus, you wouldn't be able to tell whether A and B in D were co-dominant or anything, so it could be wrong to just assume they mean AB was co-domiant because we weren't told information like that. Also, I figured with co-domiance, the 'tree' we were given would have shown similarities if that was the case instead of being completely different in colour/whatever. But IDK. I hate those things. Edit: Ah, wait, I can see it now. Bb would have showed the same characteristics as BB. -facepalm-
PHENOtypes not GENOtypes, aka 3 different things expressed, not merely three different genetic compositions. In normal dominance/recession there are only two phenotypes (homozygous dominant and heterozygous both show the same phenotype), whilst in co-dominance there are three, as there is homozygous for both letters, ie AA and BB, but also the co-dominant heterozygous form, AB.
 

Users Who Are Viewing This Thread (Users: 0, Guests: 1)

Top