VCE Biology Question Thread

[BitcoinEagle]

Hi AN
Within the stages of photosynthesis and cellular respiration, do you need to know the inputs and outputs of Photosynthesis and cellular respiration or the numbers of each input and output as well?

[Sine]

Hi AN
Within the stages of photosynthesis and cellular respiration, do you need to know the inputs and outputs of Photosynthesis and cellular respiration or the numbers of each input and output as well?

Photosynthesis
•    inputs and outputs of the light dependent and light independent (Calvin cycle) stages of photosynthesis in C3
plants (details of the biochemical pathway mechanisms are not required)
Cellular respiration
•    the location of, and the inputs and outputs of, glycolysis including ATP yield (details of the biochemical pathway
mechanisms are not required)


This is all directly from the study design - I think it is definitely better to also know the numbers of each input-output. It definitely helps with overall understanding of the process and I think in the past they may have had questions regarding it.

[Comet striker]

Eyy 800 pages les go:
Heres a question from TSFX 2018:
Question 19:
In the lymphatic system:
A. phagocytes mature into T cells
B. Mast cells are produced.
C. Plasma B cells are produced
D. Lymph is pumped by the heart.

I chose the answer: B. Mast cells are produced.
the right answer was C. Plasma B cells are produced.
I was contemplating between these two and I went with B because 1. I dont know where mast cells are made. 2. Arent Naive B cells the ones that are produced? Naive B cells then proliferate into plasma B cells and memory B cells when activated by the specific antigen and cytokines from the T helper cell.

[Erutepa]

Eyy 800 pages les go:
Heres a question from TSFX 2018:
Question 19:
In the lymphatic system:
A. phagocytes mature into T cells
B. Mast cells are produced.
C. Plasma B cells are produced
D. Lymph is pumped by the heart.

I chose the answer: B. Mast cells are produced.
the right answer was C. Plasma B cells are produced.
I was contemplating between these two and I went with B because 1. I dont know where mast cells are made. 2. Arent Naive B cells the ones that are produced? Naive B cells then proliferate into plasma B cells and memory B cells when activated by the specific antigen and cytokines from the T helper cell.

mast cells are produced in the bone marrow.
Naive b cells are produced in the bone marrow also, however it can be said that plasma b cells are produced from the differentiation of these naive b cells in the lymphatic system (typically the lymph nodes).
Thus C is correct.

[caqiu]

what is the difference between the two types of neuron signalling?
- action potential
- neurotransmitter
 
This is my description, but it kind of describes both type of signalling:
When a neuron is stimulated, it transmits a nerve impulse in the form of an electrical signal along its axon. When it arrives at the synapse (pre-synaptic neuron) it triggers the release of neurotransmitters via exocytosis into the synaptic space. It then diffuses across the gap and binds to receptors on the surface of the postsynaptic neuron (ligand-gated ion channel), which in turn causes the transmission of the nervous impulse from one neuron to another.

[ErnieTheBirdi]

Hey everyone on the Bio forum,
I have an upcoming extended investigation SAC coming up for AOS3 of Unit 2, I was just wondering, does anyone have any examples I could look at because I've never written one before and I need some help. If it helps in anyway my topic will be about IVF and northern white rhinos. Does anyone know the structure or have any advice on what I should do? Help!
Thank you, everyone

[PhoenixxFire]

what is the difference between the two types of neuron signalling?
- action potential
- neurotransmitter
 
This is my description, but it kind of describes both type of signalling:
When a neuron is stimulated, it transmits a nerve impulse in the form of an electrical signal along its axon. When it arrives at the synapse (pre-synaptic neuron) it triggers the release of neurotransmitters via exocytosis into the synaptic space. It then diffuses across the gap and binds to receptors on the surface of the postsynaptic neuron (ligand-gated ion channel), which in turn causes the transmission of the nervous impulse from one neuron to another.

A lot of this isn't in the study design anymore. You just need to know the source and mode of transmission of neurotransmitters, so just knowing the it's released from the pre synaptic neuron and diffuses across the synaptic gap to the post synaptic neuron, and knowing that that's paracrine signalling is enough.

Hey everyone on the Bio forum,
I have an upcoming extended investigation SAC coming up for AOS3 of Unit 2, I was just wondering, does anyone have any examples I could look at because I've never written one before and I need some help. If it helps in anyway my topic will be about IVF and northern white rhinos. Does anyone know the structure or have any advice on what I should do? Help!
Thank you, everyone

How is your school assessing this? Are you doing a written report or a poster or something else?

[J_Rho]

Has anyone done the Neap 2017 practice exam? Is it just me or are Neap exams H A R D?

[Erutepa]

Has anyone done the Neap 2017 practice exam? Is it just me or are Neap exams H A R D?

I've never actually done a neap exam, but I hear from others that they are typically the hardest of the company exams.

[J_Rho]

I've never actually done a neap exam, but I hear from others that they are typically the hardest of the company exams.

Phew that makes me feel a lil better about my abysmal score

[Erutepa]

Phew that makes me feel a lil better about my abysmal score

It is important not to be too disheartened by poor results. They will naturally be low at first, but it's important you really go through your mistakes, adding any info to your notes that you didn't know, and rewriting all the questions that you got wrong.

[vox nihili]

Agreed with above. NEAP exams are often pretty silly imo. Poor relationship with the course most of the time, unless they've drastically changed in the past couple of years. Wouldn't really worry about what kind of scores you get on them.

[zuijinde]

Has anyone done the Neap 2017 practice exam? Is it just me or are Neap exams H A R D?

Neap exams are good, but they aren't really a good help for actual VCE exams.
I ended up with a pretty good score for bio and I'm pretty sure the highest score I ever got from a NEAP exam was like 65% lol

[caqiu]

when we are talking about hypersensitivity reaction, do we have to mention the process in detail?

E.g. plasma cells produces IgE antibodies in response to a certain allergen and released into the blood circulation, where it binds to receptors on the surface  mast cells. Upon secondary exposure the same allergen, when the allergen binds to adjacent IgE on mast cell, a signal transduction is initiated, with mast cells producing histamine. Or can you simply just state, Allergen binds to IgE on mast cells which initiate the release of histamine and not talk about why it binds.

[Owlbird83]

when we are talking about hypersensitivity reaction, do we have to mention the process in detail?

E.g. plasma cells produces IgE antibodies in response to a certain allergen and released into the blood circulation, where it binds to receptors on the surface  mast cells. Upon secondary exposure the same allergen, when the allergen binds to adjacent IgE on mast cell, a signal transduction is initiated, with mast cells producing histamine. Or can you simply just state, Allergen binds to IgE on mast cells which initiate the release of histamine and not talk about why it binds.

Hi! I'm not sure about that specifically, but usually you can check the number of marks the question is worth so you know how many points of information to include. If it is worth more marks probably it's looking for the more detailed answer. Hope this helps.