HSC Biology: Answers & Discussion

[zoe_rammie]

Okay...with question 20... I actually put C.

And my line of thinking was this:
A) T cells don't produce antibodies so NOPE
B) It's the HELPER T cells that activate B cells
and
D) B cells can't directly destroy any antigens...They can only produce antibodies to IMMOBILISE them. (But not destroy)

And with C):
Lymphocytes actually include both B cells and T cells..

So that's why I think C) is actually the correct answer

[kevin217]

PLOT TWIST: we just had a UNSW medical student (Band 6 in Bio) because "B-cells don't directly destroy anything, only make antibodies. T cells can directly kill antigens".

Thoughts on this all? Could the consensus be wrong or is our med student mistaken?

Plot twist maybe. C is starting to look more correct if it can't be D

[zoe_rammie]

PLOT TWIST: we just had a UNSW medical student (Band 6 in Bio) because "B-cells don't directly destroy anything, only make antibodies. T cells can directly kill antigens".

Thoughts on this all? Could the consensus be wrong or is our med student mistaken?

OMG THANK YOU. I thought I was the only one who thought this!!!

[jakesilove]

Okay...with question 20... I actually put C.

And my line of thinking was this:
A) T cells don't produce antibodies so NOPE
B) It's the HELPER T cells that activate B cells
and
D) B cells can't directly destroy any antigens...They can only produce antibodies to IMMOBILISE them. (But not destroy)

And with C):
Lymphocytes actually include both B cells and T cells..

So that's why I think C) is actually the correct answer

Our Med student has actually changed her answer to C! This was one fucked question...

[Lottie99]

As it said that Pasteur looked at them under a light microscope is it reasonable to say that since viruses mainly insert themselves into cells and are very small they're not identifiable under a light microscope?

[zoe_rammie]

Our Med student has actually changed her answer to C! This was one fucked question...

OMYGOD MY HEART WAS BEATING SO FAST COZ I WAS SO SCARED I GOT THAT WRONG BUT YAAAAAAAAAAS PHEWWWW

[catalyst]

Thank you guys!! But can someone explain 23 (b)? I thought salt concentration in the blood would decrease.

[Sarahanastasianorris]

overall pretty happy with how the exam turned out! felt like multiple choice was the hardest but it always seems to be!

[Sanaz]

lol I'm so not going to be happy with my result... idk because cytotoxic T cells dont activate B cells... It's the helper T cells that do that. T cells dont produce antibodies, D seems odd but B cells do destroy melanoma cells indirectly

[youknowwho]

I did B for 19 and C for 20   

[aaron_solomon]

I did B for 19 and D for 20 :/

[youknowwho]

Thank you guys!! But can someone explain 23 (b)? I thought salt concentration in the blood would decrease.

that's what i wrote

[Blissfulmelodii]

23 (b) I wrote that the salt increases. yay! I was so doubtful about that one

[justdoit]

HATE MULTIPLE CHOICE FOR LYF!

[kaye.chen7]

I chose B for question 20 too.