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March 29, 2024, 01:18:29 am

Author Topic: VCE Biology Question Thread  (Read 3570594 times)  Share 

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darkz

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Re: VCE Biology Question Thread
« Reply #13290 on: January 17, 2021, 08:10:12 pm »
+4
Hi! I hope I'm posting this in the right place but do we need to know cell theory and features of eukaryotic or prokaryotic cells bc its in the Heinemann Textbook yet not really mentioned on the study design (i think)?
Thanks
-bluebird  ;D

Well, while you'll probably never specifically get a question asking about the differences between eukaryotic and prokaryotic cells, it forms a part of your foundational understanding of biology and thus is relatively important. Additionally, an understanding of the function of all the organelles is pretty crucial. In terms of cell theory, remembering those three statements isn't very applicable and you will never be asked to write them down at a Unit 3&4 level.
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bluebird

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Re: VCE Biology Question Thread
« Reply #13291 on: January 17, 2021, 08:12:35 pm »
0
thank you for your reply! i was looking through the study design but the "cell as the basic structural feature of life on Earth, including the distinction between prokaryotic and eukaryotic cells" comes under unit 1/2... so is it still assessable on SACs and the exam? (coz i'm doing 3/4)  :D
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darkz

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Re: VCE Biology Question Thread
« Reply #13292 on: January 17, 2021, 08:21:44 pm »
+4
thank you for your reply! i was looking through the study design but the "cell as the basic structural feature of life on Earth, including the distinction between prokaryotic and eukaryotic cells" comes under unit 1/2... so is it still assessable on SACs and the exam? (coz i'm doing 3/4)  :D

Yeh, so 1&2 content is not usually assessed in 3&4, however, core concepts like the distinction between prokaryotes and eukaryotes forms the foundation of your knowledge i.e. knowledge that bacteria have plasmids can come handy for DNA manipulation, differences in protein production between bacteria and humans (e.g. effect of having no-membrane bound organelles), or if you got asked where proteins can be synthesised in bacteria - writing an answer of rough endoplasmic reticulum would be incorrect.
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bluebird

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Re: VCE Biology Question Thread
« Reply #13293 on: January 17, 2021, 08:27:19 pm »
+1
oh ok... thank you so much darkz! that really helped
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PhoenixxFire

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Re: VCE Biology Question Thread
« Reply #13294 on: January 18, 2021, 07:15:29 pm »
+9
^You don't need to know details of the sodium potassium pump
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bluebird

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Re: VCE Biology Question Thread
« Reply #13295 on: January 21, 2021, 07:35:43 pm »
0
Hi, for phospholipids we just need to know that it has a hydrophilic head and hydrophobic tail and not the chemical formulas or more detailed aspects right? Thanks :)
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Owlbird83

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Re: VCE Biology Question Thread
« Reply #13296 on: January 21, 2021, 07:42:17 pm »
+8
Hi, for phospholipids we just need to know that it has a hydrophilic head and hydrophobic tail and not the chemical formulas or more detailed aspects right? Thanks :)

Yeah that's it for phospholipid molecules! (other knowledge needed is about plasma membrane as a whole and other components of it)

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« Last Edit: February 07, 2021, 05:49:50 pm by Owlbird83 »
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Sine

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Re: VCE Biology Question Thread
« Reply #13297 on: January 21, 2021, 07:45:24 pm »
+6
Hi, for phospholipids we just need to know that it has a hydrophilic head and hydrophobic tail and not the chemical formulas or more detailed aspects right? Thanks :)
Yeah that should be fine. Also know how that structure impacts the function of a phospholipod bilayer (e.g. what can pass across and what can't). You dont need to know the different types of phospholipids or the chemical formulas.

Edit: beaten by Owlbird83

bluebird

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Re: VCE Biology Question Thread
« Reply #13298 on: January 21, 2021, 08:59:43 pm »
+1
Thank you Owlbird83 and Sine! :)
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Chocolatepistachio

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Re: VCE Biology Question Thread
« Reply #13299 on: January 21, 2021, 09:18:26 pm »
0
In red blood cells when oxygen binds to one subunit of haemoglobin, it increases the affinity of neighbouring haemoglobin subunits for oxygen. This is an example of
A cooperativity
B phosphorylation
C covalent modulation
D allosteric modulation

Would this be a can someone explain

Sine

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Re: VCE Biology Question Thread
« Reply #13300 on: January 21, 2021, 10:18:27 pm »
+4
In red blood cells when oxygen binds to one subunit of haemoglobin, it increases the affinity of neighbouring haemoglobin subunits for oxygen. This is an example of
A cooperativity
B phosphorylation
C covalent modulation
D allosteric modulation

Would this be a can someone explain
Its not really something you can totally explain since it is basically a recall question.

The answer is cooperativity. Phosphorylation is basically adding a phosphate group onto something e.g. an enzyme and both modulations can be relevant to receptors/enzymes.

Oynx

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Re: VCE Biology Question Thread
« Reply #13301 on: January 21, 2021, 11:11:35 pm »
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Its not really something you can totally explain since it is basically a recall question.

The answer is cooperativity. Phosphorylation is basically adding a phosphate group onto something e.g. an enzyme and both modulations can be relevant to receptors/enzymes.

Will or can this be assessed on the end of year exam? Is it apart of the study design?
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darkz

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Re: VCE Biology Question Thread
« Reply #13302 on: January 21, 2021, 11:40:39 pm »
+3
Will or can this be assessed on the end of year exam? Is it apart of the study design?

Definitely not relevant to VCE Biology.
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Chocolatepistachio

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Re: VCE Biology Question Thread
« Reply #13303 on: January 24, 2021, 03:55:01 pm »
0
For this question
Luke’s arrived at the hospital dehydrated from having spent the past few days with diarrhoea and vomiting. Is a hypertonic solution suitable for him? Explain

Dehydrated therefore there is a low concentration of solutes outside the cell.
- need a solution that will increase the concentration of solutes outside the cell
- A hypertonic solution would not be suitable
- A hypotonic solution would be suitable - solutes would move from inside the cell to outside

This is what I was thinking would this be right

Bluebird

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Re: VCE Biology Question Thread
« Reply #13304 on: January 26, 2021, 07:23:16 pm »
0
Hi ATARNotes!

My question is why do chloride ions use facilitated diffusion through a channel protein to cross the plasma membrane? I thought they would use active transport since they are ions.
What molecules do use active transport then?