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March 29, 2024, 07:02:57 am

Author Topic: VCE Biology Question Thread  (Read 3570899 times)  Share 

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Sine

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Re: VCE Biology Question Thread
« Reply #12510 on: May 19, 2020, 02:00:15 pm »
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Hey everyone! I have an upcoming AOS2 SAC2 for Unit3 on immunity and all the signalling stuff. I still don't really understand it all, for example, naive and regular cells? Lymphatic system and MHC proteins? I was just wondering i someone would be able to explain those things to me? and if possible give me a guideline/checklist on what to look out for/study more of for the SAC (I know it's on the study design).
The content can sometimes differ between schools depending on how fast they cover the content and when they cover it. However, the general things I think it would be good to learn would be.
- What is an antigen?
- What is a self-antigen, non-self antigens?
- How do allergens elicit an immune response?
- What are some chemical and physical barriers? (i.e the 1st line of defence).
- Types of cells involved in the innate immune system + the complement system
- lymphatic system
- lymphocytes (B and T cells)
- How are these lymphocytes activated, what are they activated by, what is there functions etc
- Distinguish between humoral and cell-mediated immunity
- What are the two main T cells and their functions
- How to acquire immunity (passive/active), have examples
- DIffer between natural/artificial immunity
-Vaccinations/herd immunity
-Clinical use of mAb

Definitely not everything but going through this should be a good revision of an overview of the immune system in terms of what VCAA want you to know.


thatdumbstudent

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Re: VCE Biology Question Thread
« Reply #12511 on: May 22, 2020, 08:52:09 pm »
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list five examples of molecules that may be ligands for PRRs?

i am quite confused about this. also, are PRRs receptors for PAMPs? in that cause, does that mean they bind with each other?

darkz

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Re: VCE Biology Question Thread
« Reply #12512 on: May 22, 2020, 09:39:49 pm »
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list five examples of molecules that may be ligands for PRRs?

i am quite confused about this. also, are PRRs receptors for PAMPs? in that cause, does that mean they bind with each other?

As a disclaimer for everyone else, in terms of VCE Biology, you won't be required to know about PRRs or PAMPs (although I do know that some schools teach and incorporate this stuff into SACs). For your question:

Yes, PRRs are receptors used by immune cells to recognise PAMPs. In terms of examples, I don't know what depth you're after, however, they'd just be examples of distinct features of pathogens e.g. flagella, lipopolysaccharides (components of bacterial cell walls), and dsRNA.
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Snow Leopard

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Re: VCE Biology Question Thread
« Reply #12513 on: May 23, 2020, 11:17:05 pm »
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Hi Snow Leopard,

I'm pretty sure mental illnesses/disorders such as anxiety and addiction would be a negative feedback loop rather than a positive feedback loop as both are triggered by three overlapping events: the trigger or environmental cue, the mental reactivity and physical reactivity. Usually speaking and from personal experience, I find that my anxiety "loop" in a more physical/literal form reduces the change of my mindset, which thus when I studied this topic in biology, enabled me to understand that negative feedback reduces change whereas positive feedback amplified change (which will result in more of a certain product).

Hopefully, that helps :)

Have a great week and kind regards,

Darcy Dillon.
Hey Darcy, thanks for the explanation. I'm still a little confused, with a positive feedback loop aren't you re-enforcing the same behaviour (e.g: you feel anxious, but when the loop gets to the outcome, don't you feel even more anxious) and with a negative feedback loop if you felt anxious then wouldn't the outcome be that you've become less anxious?
(sorry if this makes no sense...maybe I'm just confusing myself)

ABB0005

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Re: VCE Biology Question Thread
« Reply #12514 on: May 24, 2020, 07:33:45 pm »
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Does anyone have a list or know of all the relevant questions from VCAA exams 2002-2016?

Thank you

vox nihili

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Re: VCE Biology Question Thread
« Reply #12515 on: May 24, 2020, 08:13:28 pm »
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Hey Darcy, thanks for the explanation. I'm still a little confused, with a positive feedback loop aren't you re-enforcing the same behaviour (e.g: you feel anxious, but when the loop gets to the outcome, don't you feel even more anxious) and with a negative feedback loop if you felt anxious then wouldn't the outcome be that you've become less anxious?
(sorry if this makes no sense...maybe I'm just confusing myself)

Straying a little bit away from VCE Biology on this topic, but yes the way you've described feedback is correct.
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coldairballoon

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Re: VCE Biology Question Thread
« Reply #12516 on: May 24, 2020, 11:45:58 pm »
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Does anyone have a list or know of all the relevant questions from VCAA exams 2002-2016?

Thank you

I don't have the book anymore but I know connect education has a whole table of the questions that are no longer relevant to the study design at the back of their notes. Checkpoints have probably left out the irrelevant questions in their book too.
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Sine

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Re: VCE Biology Question Thread
« Reply #12517 on: May 25, 2020, 02:33:29 pm »
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Does anyone have a list or know of all the relevant questions from VCAA exams 2002-2016?

Thank you
I know from the early years stuff like water balance is no longer relevant and hasn't been required for a long time. You also don't need to know stuff about specific plant hormones which were popular questions in the late 00s. However, a  lot of study design largely remains the same.

Generally, if you know the study design well enough you should be able to discern if a question is still relevant or not.

Bsaini

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Re: VCE Biology Question Thread
« Reply #12518 on: May 28, 2020, 09:36:31 pm »
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Hey,
Need help with a question

What fluid is closest to the homeostatic norm of a person and why?

a. water  b.Naci  c. gatorade

thanks in advance

darkz

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Re: VCE Biology Question Thread
« Reply #12519 on: May 29, 2020, 12:10:06 am »
+1
Hey,
Need help with a question
What fluid is closest to the homeostatic norm of a person and why?
a. water  b.Naci  c. gatorade
thanks in advance

Well I'd assume that the homeostatic norm is simply asking which of the following is isotonic i.e. similar concentration of solutes to blood. Pure water is hypotonic and would cause haemolysis. Pure NaCl would be hypertonic, leading to creation. That leaves gatorade which supposedly has a good concentration of solutes to be isotonic.
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jessieleung

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Re: VCE Biology Question Thread
« Reply #12520 on: May 31, 2020, 10:03:43 pm »
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Hey,
My cellular signalling SAC (1hr SAC) is in 5 days and I was wondering if you could tell me what I should do that will prepare me best.
(eg. what are the main points I should remember? are there any specific words I should use in my answers? etc.)
I also don't feel incredibly confident so any suggestions on how i can consolidate my knowledge would be great!

whys

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Re: VCE Biology Question Thread
« Reply #12521 on: May 31, 2020, 10:28:38 pm »
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Hey,
My cellular signalling SAC (1hr SAC) is in 5 days and I was wondering if you could tell me what I should do that will prepare me best.
(eg. what are the main points I should remember? are there any specific words I should use in my answers? etc.)
I also don't feel incredibly confident so any suggestions on how i can consolidate my knowledge would be great!
That's a very broad question! (and something you will need to find for yourself :) ) You can do this by consolidating your knowledge through practice questions. They are the best way of learning what keywords you need in your answers to get the marks and will help in building your confidence. Doing questions helps you figure out what each mark is allocated for in a specific question, and the more you expose yourself to different types of questions, the easier you will find it. For the main points you should remember, look over the study design and your notes/textbook. To answer your second question, I think that a great way of consolidating knowledge is teaching others - your family or your soft toys! - the content. You can also create flashcards, visual posters and annotate the study design, but I'm a big believer that the main form of practice you should be doing is questions - they are simply irreplaceable and will prepare you well.
« Last Edit: May 31, 2020, 10:49:26 pm by whys »
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jessieleung

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Re: VCE Biology Question Thread
« Reply #12522 on: May 31, 2020, 10:43:32 pm »
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That's a very broad question! (and something you will need to find for yourself :)) You can do this by consolidating your knowledge through practice questions. They are the best way of learning what keywords you need in your answers to get the marks and will help in building your confidence. Doing questions helps you figure out what each mark is allocated for in a specific question, and the more you expose yourself to different types of questions, the easier you will find it. For the main points you should remember, look over the study design and your notes/textbook. To answer your second question, I think that a great way of consolidating knowledge is teaching others - your family or your soft toys! - the content. You can also create flashcards, visual posters and annotate the study design, but I'm a big believer that the main form of practice you should be doing is questions - they are simply irreplaceable and will prepare you well.
Where can I find some good questions to complete?

s110820

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Re: VCE Biology Question Thread
« Reply #12523 on: June 01, 2020, 09:41:26 am »
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Where can I find some good questions to complete?

Hi Jessie!

While I'm not a VCE student, I did a bit of research for you and I found a few resources that you might find useful in your Biology studies:

1. TSFX -> https://www.tsfx.edu.au/vce/subject-blogs/biology/ask-an-assessor-your-biology-questions-answered/

While this website may not have practice questions or topic tests, I found it really useful for how to study biology and how the assessors view the exams.

2. EdUnlimited

Through the EdUnlimited subscription, you can gain access to a multitude of practice exams, practise questions and topic tests. For example, you can find individual practice questions from NEAP and ATAR Notes just to name a few.

Hopefully, this helps, but of course, if you would like me to do a little bit more research, please let me know as I would be more than happy to :)

Best of luck for your biology studies and have a great week!

Kind regards,

Darcy Dillon.
QUT 2021 - Bachelor of Education (Primary).

Emily24566:

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Re: VCE Biology Question Thread
« Reply #12524 on: June 02, 2020, 12:54:48 am »
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An individual is constipated. They take magnesium salts to help loosen the stool why does this work?
Water moves from the blood to the intestines because the blood is hypotonic.

Can someone please explain why this is the answer. Don’t really understand