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March 29, 2024, 01:06:48 am

Author Topic: VCE Biology Question Thread  (Read 3570577 times)  Share 

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J_Rho

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Re: VCE Biology Question Thread
« Reply #12405 on: April 03, 2020, 02:49:20 pm »
0
How does everyone draw tertiary and quaternary protein structure?? I've seen a couple of different ways and I'm curious (and I wanna make my notes pretty  8) and most diagrams of it aren't good looking when drawn)
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elena1510

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Re: VCE Biology Question Thread
« Reply #12406 on: April 07, 2020, 02:54:30 pm »
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We were giving a diagram of an adipose cell, which had a large area of fat inside. There was an arrow pointing to it and we were asked to label the organelle, I wrote vacuole but the answer was fat/triglyceride. I was just wondering if vacuoles store fat?

whys

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Re: VCE Biology Question Thread
« Reply #12407 on: April 07, 2020, 03:20:37 pm »
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We were giving a diagram of an adipose cell, which had a large area of fat inside. There was an arrow pointing to it and we were asked to label the organelle, I wrote vacuole but the answer was fat/triglyceride. I was just wondering if vacuoles store fat?

Theoretically, yes, but I'm not sure if they usually do. They predominantly store liquids (+ other nutrients), however I know that fat cells can store lipids in their vacuoles. Fat is not an organelle, so if the question asked you to specifically name the organelle, vacuole should have been the correct answer.
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elena1510

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Re: VCE Biology Question Thread
« Reply #12408 on: April 07, 2020, 04:12:39 pm »
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Theoretically, yes, but I'm not sure if they usually do. They predominantly store liquids (+ other nutrients), however I know that fat cells can store lipids in their vacuoles. Fat is not an organelle, so if the question asked you to specifically name the organelle, vacuole should have been the correct answer.

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vox nihili

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Re: VCE Biology Question Thread
« Reply #12409 on: April 07, 2020, 10:50:44 pm »
+3
We were giving a diagram of an adipose cell, which had a large area of fat inside. There was an arrow pointing to it and we were asked to label the organelle, I wrote vacuole but the answer was fat/triglyceride. I was just wondering if vacuoles store fat?

I wouldn't worry too much about this question. Doesn't seem like a particularly reasonable thing to have put on a VCE question.

They're not quite vacuoles though. They're called lipid droplets. Very much outside the scope of VCE though so don't worry.
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miyukiaura

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Re: VCE Biology Question Thread
« Reply #12410 on: April 08, 2020, 12:25:58 pm »
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In the Heinneman textbook there's a section on organelles and macromolecules (proteins, lipids, nucleic acids, carbohydrates). However none of this is explicitly stated on the study design (except for proteins and nucleic acids) - so in how much detail do need to know this? thanks  ;D
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Flybird123

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Re: VCE Biology Question Thread
« Reply #12411 on: April 13, 2020, 05:02:52 pm »
+1
Hello
I would like to ask if we can write chemical formulas like CO2 or H20 or O2 instead of words like carbon dioxide in exam?
thanks in advance

Geoo

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Re: VCE Biology Question Thread
« Reply #12412 on: April 13, 2020, 05:07:46 pm »
+3
Hello
I would like to ask if we can write chemical formulas like CO2 or H20 or O2 instead of words like carbon dioxide in exam?
thanks in advance
Yes you can, however i would state the name first "carbon dioxide" then later in the question write CO2. I wouldn't do this for O2 however, i would just state oxygen, or oxygen gas.
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PhoenixxFire

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Re: VCE Biology Question Thread
« Reply #12413 on: April 13, 2020, 08:10:35 pm »
+3
^Don’t need to write the full name first, it’ll be accepted regardless, just make sure you get it right
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miyukiaura

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Re: VCE Biology Question Thread
« Reply #12414 on: April 14, 2020, 09:12:10 pm »
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Why isn't water availability usually a limiting factor in photosynthesis even though it's a reactant?
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whys

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Re: VCE Biology Question Thread
« Reply #12415 on: April 14, 2020, 09:36:27 pm »
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Why isn't water availability usually a limiting factor in photosynthesis even though it's a reactant?

This is because not a lot of water is required for photosynthesis to occur (generally). If the plant doesn't get enough water, then its stomata will close and CO2 intake will be limited. This gives a good explanation.
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vox nihili

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Re: VCE Biology Question Thread
« Reply #12416 on: April 15, 2020, 06:36:12 pm »
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This is because not a lot of water is required for photosynthesis to occur (generally). If the plant doesn't get enough water, then its stomata will close and CO2 intake will be limited. This gives a good explanation.

Water is never a limiting factor because the reactions occur in an aqueous environment. All of the molecules that are involved in photosynthesis are dissolved in water, so there's an abundance of water relative to all of the other molecules.
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whys

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Re: VCE Biology Question Thread
« Reply #12417 on: April 15, 2020, 06:46:53 pm »
+2
Water is never a limiting factor because the reactions occur in an aqueous environment. All of the molecules that are involved in photosynthesis are dissolved in water, so there's an abundance of water relative to all of the other molecules.

Can a reason also be that since the plant undergoes transpiration and it uses water for other purposes, the water needed for photosynthesis is minimal and thus it generally doesn't count as a limiting factor? Or would it be more correct to say what you said above? Basically, what I'm understanding is that since the plant always has an abundance of water for photosynthesis, it is not a limiting factor. Does this relate to the plant needing to be in a hypotonic solution (turgid) for a constant flow of water (thus maintaining aqueous conditions inside where the other molecules are dissolved - which is always true for all plants)?
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makram

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Re: VCE Biology Question Thread
« Reply #12418 on: April 16, 2020, 08:55:23 pm »
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What is VCAA's definition of an allergen?

darkz

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Re: VCE Biology Question Thread
« Reply #12419 on: April 17, 2020, 12:15:48 am »
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What is VCAA's definition of an allergen?

Well allergens would be defined as anything that stimulates an allergic reaction, e.g. pollen, dust.
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