Uni Stuff > Australian National University

Biologists! How was it?

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Essein:
Chemical composition for a polypeptide could have being C O H N some Sulfur, cause polypeptides are short proteins and proteins are made of amino acids, and all those chemicals are in an amino acid.

Saraime2003:
I wrote the number '11' on my hand so i would remmeber to come back to the fibrous protein question, cos i couldn't think of one, i thought collagen was a structural protein so i didn't write that... i got to my next exam n looked at my hand wondering why i had 11 on my hand, then i remembered and i was like OMG IDIOT!!! lol.... it was only 1 mark though. for the antigen one i wrote Th cells too n i said because Th cell recognise the antigens which are presented on the surface of the macrophages or phagocytes or whatever, then the Th cells stimulate the B cells to produces antibodies to fight the antigens. or something like that.

I wrote amino acids for the polypeptide subunits... For the tasmanian tiger thing about why the tumour cells were recognised as self cells i worte because the MHC markers on the tumour cells surface probabaly had species MHC markers so the tiger without the tumour recognised the tumour as self. lol i probably got that wrong but it was the best i could think of. lol

Aimee :)

Edit:

Just thought i'd let you all know about my stupid mistakes i made...
on the question where you had to give 2 reasons for each why DNA and RNA are different i wrote the most obvious one first:
DNA has 4 nitrogen bases: adenine, guanine, cytosine and thymine. then i wrote RNA has 4 nitrogen bases too, but they are: Adenine, Uracil, Guanine and Cytosine.

Then i had a mental blank and wasn't sure if adenine was adenine or adenisine, so i crossed it out and wrote adenisine, then crossed it out n wrote adenine then decided later it was adenisine. i meant to go back n change it to adenine again before i left, but i forgot :'(

Then for the next part of the question i wrote DNA has a linear sequence and  then i think i wrote RNA has a circular DNA sequence XD lol...

i was worried it would be really hard n i'd make mistakes it ended up being reeally easy but i made many stupid mistakes. lol

lacoste:
1). the first question was ridiculous,
chemical composition?? elements or actual molcule eg. phospholipid molecule?

2). last qst. was too general, something about the stimulus, i mean the ansnwer was in the paragraph above;
change in amount of copper? is that what everyone got? but i also mentioned about the enzyme jst in case

3). experiment,,, 5marks? what the?
1 mark for hypo, 1 mrk for results, 1 mrk for steps involving?? what else??

nancy:
has any1 in this biology forum been to the tsfx intensive program in semester 1? im wonderin if its worth doin for UNIT 4?
?????????

hoopa:
i had a massive mental blank on the fibrous protein example and the electron transport chain!?! anybody else have trouble with that?

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