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March 29, 2024, 08:48:05 am

Author Topic: VCE Biology Question Thread  (Read 3570975 times)  Share 

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Erutepa

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Re: VCE Biology Question Thread
« Reply #11835 on: July 22, 2019, 10:27:04 pm »
+2
Do we need to know about CRISPR technology for unit 4 biology?
You don't need to know about CRISPR and cas 9 gene editing techniques.

What you do need to know is the function of restriction enzymes, ligases and polymerase within DNA manipulation.
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darkz

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Re: VCE Biology Question Thread
« Reply #11836 on: July 22, 2019, 10:28:00 pm »
+2
Do we need to know about CRISPR technology for unit 4 biology?

For the exam, I doubt you'd need to know any specifics about CRISPR, i.e. if they ask you about it, they will provide you with sufficient background information. With that being said, if you do learn about it, in the case that they do use it as a case study on the exam, you will have a slight advantage over others. As for school SACs, always confirm with your teachers, because I know of some schools putting things on SACs that aren't necessarily on the study design.
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FrankieDens

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Re: VCE Biology Question Thread
« Reply #11837 on: July 23, 2019, 05:29:54 pm »
0
Hi everyone!

I just got back my U3 AoS 2 SAC back and wow... THANK YOU ALL SO MUCH!  ;D I took in most of the tips from those Study Guides for Bio and I went from a 79% on the first SAC to 89%!! Thank you so much for being such a good resource and answering my questions etc and now I'm getting really excited for the rest of the year learning bio!!  :)

So anyways sorry about that happiness burst and please answer some of my questions (when you have the time of course) ;):

  • Describe what a vaccine against strangle disease may consist of 1 mark
I wrote down 'The foreign antigens of Streptococcus equi' while on the assessment report it said 'the attenuated form of strangles bacteria which still includes the specific antigen'. Do vaccines always contain attenuated pathogens or can it still be 'activated' per say?

Maybe because I haven't revised U3 AoS 1 in a while but here:
  • Which one of the following scenarios is consistent with a prokaryotic pathogen?
     A. The influenza virus is inhaled by unsuspecting person in a lift
     B. Misshapen prions are consumed because a person ate undercooked brain
     C. The malarial plasmodium (protist) is transferred from a host to another person via a mosquito vector
     D. A cholera bacterium is consumed by drinking water
* I picked C but the answer is D... is it because I got confused with the whole eukaryotic vs prokaryotic thing? If so, what specific organisms are categorised under eukaryotes or prokaryotes? (I'M SORRY THIS MUST BE SUCH A SIMPLE QUESTION BUT I JUST FORGOT LOL  :o)
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PhoenixxFire

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Re: VCE Biology Question Thread
« Reply #11838 on: July 23, 2019, 06:27:57 pm »
+3
Hey!

Awesome to hear that those study guides helped :)

Describe what a vaccine against strangle disease may consist of 1 mark

I wrote down 'The foreign antigens of Streptococcus equi' while on the assessment report it said 'the attenuated form of strangles bacteria which still includes the specific antigen'. Do vaccines always contain attenuated pathogens or can it still be 'activated' per say?
Is this something you self marked or something you got wrong? I'd say your answer is fine - it's the antigens that are important. There are several ways to make vaccines, one of which is to use an attenuated form, another of which is just to use subunits (ie. antigens) and it'd be unreasonable to expect you to know which type of vaccine they're after.

Maybe because I haven't revised U3 AoS 1 in a while but here:
Which one of the following scenarios is consistent with a prokaryotic pathogen?
     A. The influenza virus is inhaled by unsuspecting person in a lift
     B. Misshapen prions are consumed because a person ate undercooked brain
     C. The malarial plasmodium (protist) is transferred from a host to another person via a mosquito vector
     D. A cholera bacterium is consumed by drinking water
* I picked C but the answer is D... is it because I got confused with the whole eukaryotic vs prokaryotic thing? If so, what specific organisms are categorised under eukaryotes or prokaryotes? (I'M SORRY THIS MUST BE SUCH A SIMPLE QUESTION BUT I JUST FORGOT LOL  :o)
Yeah protists are eukaryotes, it's just archea and bacteria that are prokaryotes.
« Last Edit: July 23, 2019, 06:41:20 pm by PhoenixxFire »
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Chocolatemilkshake

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Re: VCE Biology Question Thread
« Reply #11839 on: July 29, 2019, 08:04:35 pm »
0
Hi everyone,

Is PCR usually completed on a DNA sample prior to being run on gel electrophoresis?

Thanks!
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darkz

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Re: VCE Biology Question Thread
« Reply #11840 on: July 29, 2019, 08:06:17 pm »
+2
Hi everyone,

Is PCR usually completed on a DNA sample prior to being run on gel electrophoresis?

Thanks!

Yep, PCR is used so that there would be enough DNA present to be able to show clear bands on the gel.
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DBA-144

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Re: VCE Biology Question Thread
« Reply #11841 on: July 29, 2019, 09:06:32 pm »
+1
Does genetic bottleneck refer to the reduction in population size or reduction in genetic diversity in the population. I think the first kind of implies the other, right?
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nianid

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Re: VCE Biology Question Thread
« Reply #11842 on: July 30, 2019, 09:38:40 am »
+4
Does genetic bottleneck refer to the reduction in population size or reduction in genetic diversity in the population. I think the first kind of implies the other, right?

Both really as one follows the other. Genetic bottleneck effect is part of genetic drift where a random chance event will alter the allele frequency of a population. In the bottleneck effect, a random chance event (such as a flood) will alter the allele frequency of a population due to reducing the population (again randomly is really important, organisms die by chance, not due to not possessing  a phenotype with a higher adaptive value) . The few survivors (By chance) are unrepresentative of the original population and there is a smaller gene pool (reduction in genetic diversity) and a smaller variety of alleles in the gene pool due to loss of alleles from loss of species within a population. Hope this helps!
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Geoo

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Re: VCE Biology Question Thread
« Reply #11843 on: August 01, 2019, 09:44:22 pm »
0
Hi,
I am currently doing the unit 4 poster, and I was wondering if it is ok to reuse the topic I did for my unit 3 poster. It is on photosynthesis, and how different colours of light (wavelengths) affect the rate of photosynthesis. I am using a different experiment to do this, but it is still the same topic, is this ok that i reuse it? I know it is based on methodology, but.....
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pugs

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Re: VCE Biology Question Thread
« Reply #11844 on: August 02, 2019, 11:32:41 am »
0
is it right to say that a translocation mutation has no overall effect on the genotype/has no overall loss of genetic information because the same genetic information is present, but just on a different chromosome?

and, do translocation mutations have an effect on phenotype? (i'm thinking yes, but i'm not sure)

thanks! :)


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PhoenixxFire

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Re: VCE Biology Question Thread
« Reply #11845 on: August 02, 2019, 04:41:01 pm »
+5
Hi,
I am currently doing the unit 4 poster, and I was wondering if it is ok to reuse the topic I did for my unit 3 poster. It is on photosynthesis, and how different colours of light (wavelengths) affect the rate of photosynthesis. I am using a different experiment to do this, but it is still the same topic, is this ok that i reuse it? I know it is based on methodology, but.....
Would be a good idea to check with your teacher as it might vary between schools but you should be fine so long as you're not resubmitting work (so as long as the poster is entirely new you should be fine).

is it right to say that a translocation mutation has no overall effect on the genotype/has no overall loss of genetic information because the same genetic information is present, but just on a different chromosome?

and, do translocation mutations have an effect on phenotype? (i'm thinking yes, but i'm not sure)

thanks! :)
Yes and sometimes. If the translocation causes half of a gene to end up on a different chromosome to the other half then it's not going to get transcribed properly, however the other copy of that gene will still work fine, so sometimes phenotype is unaffected. However, if two good copies of the gene are needed for the phenotype to be normal, then breaking one of them will affect the phenotype.
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xxxjss

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Re: VCE Biology Question Thread
« Reply #11846 on: August 05, 2019, 04:14:33 pm »
0
 ??? :o :o Can someone please help with how to explain bio geography as evidence for evolution?
Is : As the distribution of organisms is not random and scattered, that is they are specific to a region despite similar selection pressures existing globally, it can be concluded that organisms must of had different ancestors that diverged in distinct regions to produce such poor distribution across Earth, correct?
:-\ Do I need to mention how present organisms are structurally similar to past in the same environment?
I can't be the only one who loathes U4AOS1.....

« Last Edit: August 05, 2019, 04:16:18 pm by xxxjss »

caffinatedloz

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Re: VCE Biology Question Thread
« Reply #11847 on: August 06, 2019, 07:23:02 pm »
+2
??? :o :o Can someone please help with how to explain bio geography as evidence for evolution?
Is : As the distribution of organisms is not random and scattered, that is they are specific to a region despite similar selection pressures existing globally, it can be concluded that organisms must of had different ancestors that diverged in distinct regions to produce such poor distribution across Earth, correct?
:-\ Do I need to mention how present organisms are structurally similar to past in the same environment?
I can't be the only one who loathes U4AOS1.....

Hey! I think that for this you are meant to discuss how species on different continents have homologous structures and have evolved from common ancestors. In particular, look at the believed shape of Pangea and how areas of land that are modernly on different continents would have once been connected. Then look at the species on each continent that evolved from a common ancestor.

I'm not 100% sure I understood your question but I hope this is some help.

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Re: VCE Biology Question Thread
« Reply #11848 on: August 09, 2019, 03:10:39 pm »
0
I was wondering if anyone has been to the TSFX exam revision lectures. I looked at the pricing for the lectures and with Unit 3 and 4 Bio lectures, it totalled to $280, and I can't afford that. So I was wondering if anyone could sell me TSFX notes or help me out by recommending cheaper but effective revision lectures for Bio 3/4.

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Re: VCE Biology Question Thread
« Reply #11849 on: August 09, 2019, 07:49:54 pm »
+4
I was wondering if anyone has been to the TSFX exam revision lectures. I looked at the pricing for the lectures and with Unit 3 and 4 Bio lectures, it totalled to $280, and I can't afford that. So I was wondering if anyone could sell me TSFX notes or help me out by recommending cheaper but effective revision lectures for Bio 3/4.

sorry in advance if this isn't much help but last year I know Monash University hosted two revision lectures during the term 3 holidays. One I attended was at clayton and ran for most of the day, covered everything and hardcopy notes provided. The lecturer they had was fantastic and notes were awesome.
I know the faculty of pharmacy and pharmaceutical sciences also usually runs a shorter one at their parkville campus. I think the clayton one costed like 10 bucks to attend and the other is free.
In saying that I did a quick search and couldnt manage to find the details for this years ones, so you'll just have to have a look yourself and keep your eye out
good luck
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