VCE Biology Question Thread

[cosine]

Yes, totally.  Imagine you're producing gametes through meiosis - you have two (non-identical) copies of each chromosome, one from your mum and one from your dad - and you'll pass down one of these chromosomes.  So one of your gametes could look like this:
chromosome 1 - your mum's
2 - dad's
3 - dad's
4 - dad's
5 - mum's

and so on; or it could be 1 - mum's, 2 - mum's, 3 - dad's, 4 - mum's, 5 - mum's and so on.  There are millions of possible combinations of chromosomes, and once you add crossing over...

But in mitosis, daughter cells are identical and this doesn't happen as homologous chromosomes don't disjoin, rather, all cells will have both your mum's and your dad's chromosomes.

Thanks Bangali_lok

How much do we need to know about apoptosis?

[heids]

Thanks Bangali_lok

How much do we need to know about apoptosis?

Not totally sure, but my guess:
- what it is (definition)
- general basic steps in how it works but not in too much detail, including difference between mitochondrial and death pathways
- a couple of triggers/reasons for apoptosis, through both the mitochondrial and death pathways

[cosine]

Cheers.

- When motor neurones propagate the action potential towards the effector muscles/tissue, do they release neurotransmitters to the target cells/tissue to actually respond? For example, when you touch a hot object, the sensory neurones send the message to the CNS (spinal cord) and then interneurones relay the message to the motor neurons which will send the potential to the hand muscles to move the hand. When the axon terminals of the motor neurones reach the target muscle cells, do they release neurotransmitters to make the hand move or is it an electrical shock or something?

- Do we need to know about neurohormones? I have never seen anything on it but is it required knowledge? If so, what are they?

[heids]

Cheers.

- When motor neurones propagate the action potential towards the effector muscles/tissue, do they release neurotransmitters to the target cells/tissue to actually respond? For example, when you touch a hot object, the sensory neurones send the message to the CNS (spinal cord) and then interneurones relay the message to the motor neurons which will send the potential to the hand muscles to move the hand. When the axon terminals of the motor neurones reach the target muscle cells, do they release neurotransmitters to make the hand move or is it an electrical shock or something?

- Do we need to know about neurohormones? I have never seen anything on it but is it required knowledge? If so, what are they?

1.  So I believe.
2.  On the SD; try https://en.wikipedia.org/wiki/Neurohormone (evidently in far less detail, you just need to know very very basically what it is and how it works).

[cosine]

Does crossing over only affect our ratios when the two genes are linked?

[cosine]

When we refer to acquired and immunity, it can be passive or active. However, just say its passive immunity. I know this means that the body does not produce the antibodies against the antigen but they are acquired through, say, by breast feeding. Does this only refer to the transmission of antibodies? I mean, can't B and T cells also be transmitted through breast feeding?

[cosine]

Is an allergic response specific or non-specific, because dont the specific IgE antibodies need to be produces?

[Biology24123]

Is an allergic response specific or non-specific, because dont the specific IgE antibodies need to be produces?

Specific

[Biology24123]

When we refer to acquired and immunity, it can be passive or active. However, just say its passive immunity. I know this means that the body does not produce the antibodies against the antigen but they are acquired through, say, by breast feeding. Does this only refer to the transmission of antibodies? I mean, can't B and T cells also be transmitted through breast feeding?

No only antibodies are transferred

[BakedDwarf]

Uhh, so this question is on VCAA 2008 Exam 2.

Can't the answer be both A and C?

[Biology24123]

Uhh, so this question is on VCAA 2008 Exam 2.

Can't the answer be both A and C?

No it's C. The question says more likely to, not the mode of inheritance is

[cosine]

No it's C. The question says more likely to, not the mode of inheritance is

Do you know why these cells cannot also pass through the breast feeding?

And why is it more likely to be X linked rather than autosomal recessive?

Thanks

[cosine]

Why is it that if mast cells are involved in both inflammation and allergic responses, the allergic responses swell up more??

[Biology24123]

Do you know why these cells cannot also pass through the breast feeding?

And why is it more likely to be X linked rather than autosomal recessive?

Thanks

Only males affected.

[Biology24123]

Why is it that if mast cells are involved in both inflammation and allergic responses, the allergic responses swell up more??

Don't think that's true