.

[akira88]

GG for bio SACS this year :/

We have three periods to do it

1st- we do the experiment
2nd - he goes through EVERYTHING, tells the whole class all the answers basically
3rd  - we do the actual test

I got 24/25 for the first SAC and that was somewhere in the top 10
the lowest mark in the class was basically an A/A+

Wow easy SACs or people are all really good?

[TrueLight]

so how are bio students liking it (bio) so far?
hate it? like it? difficult? easy?

cause if i remember correctly unit 3 is more interesting than unit 4

[lexitu]

Loving it, and u3 is much better than u4, I can tell. U4 also looks harder but that's not why its less interesting.

[TrueLight]

ha cool ... anything in particular? or u like everything... yeah u4 is like evolution boring..lol

[akira88]

About time I'm up to Outcome 2! It sounds so interesting, the immune system etc
I quite like biology, except the parts where the textbook doesn't explain information very well (how proteins are made). Still a bit icky on that.

[lexitu]

Specific, non-specfic defence and all that jazz looks very nice. Respiration and photosynthesis are amazing as always. Can you remember what you liked?

What specifically don't you understand about proteins? Are you using NOB, because if so, I can see why the explanations are poor. NOB is over-rated, I borrowed Heinemann and it is much better.

[TrueLight]

yeah immunity is very nice and the dna and protein stuff
respiration and photosynthesis i never really liked and i still don't like lol
yeah nature isn't that good..i had used that textbook

[slothpomba]

i  :smitten: biology.

[akira88]

I used Heinemann, but how they first introduced how proteins are made was with some analogy (office, "photocopying", workers etc.) Grr okay, the analogy is fine, but I don't particularly like it

Hmm well... transcription occurs in the nucleus? mRNA is made and then goes out of the nucleus into the cytoplasm... to the ribsomes? tRNA then carries an anti-codon and something something something and then arranges the sequence of amino acids that fits into the coding of the mRNA? Oh god I'm so lost. I've looked up the meaning for translation multiple times but it doesn't seem to stick in my mind, probably because I still don't understand it

[TrueLight]

in eukaryotes..
yep..yep..yep... ye..p....lol

translation is just making of the polypeptide chain from reading of the mrna

[lexitu]

Yeah, gotta love bio-lodgerino. Proteins are good too, agree with you on that.

Akira - I hate stupid analogies too. I'm not too sure yet about the exact way that proteins are made but I don't think you need to know at this stage. Your explanation seems okay, although I better learn what an anti-codon is My understanding so far is that: mRNA copies the required segment of DNA carrying the codons that represent AAs. tRNA transfers the specific AAs to the ribosome and rRNA helps by reading the mRNA instructions and directing assembly of the polypeptide chain.

The reason why I say you don't need to know anything more then simple information at the moment is this:


What should I cover about DNA in Unit 3?

Response:
In Unit 3 Outcome 1 (p. 22 of the study design) students should understand the structure of DNA a polymer made from monomers and that its functions as a store of information to code for proteins.

The nucleus holds the genetic code in its base sequence. The code is carried to ribosomes by mRNA which is complementary to the DNA codons. There the code specifies the order of amino acids to form polypeptides that are converted into proteins by folding and cross-chain bonding. The genetic code is based on the base pairs that form the code.

Students should understand that three bases in sequence (a triplet) code for a particular amino acid. A gene can be defined as a sequence of triplets.

The process by which the code assembles the amino acids is gene expression. The mechanism of gene expression involves transcription and translational. Knowledge of gene expression (transcription and translation) is required in Unit 4 Outcome 1 (p. 27 of the study design).



I took this from the VCAA's biology FAQ. It's actually a worthwhile read considering the broadness of the study design.
http://www.vcaa.vic.edu.au/vce/studies/biology/biologyfaqs.html

[akira88]

Thanks a lot aleitu1! I'm actually fine with all of that stuff, so phew
(except not being 100% sure what translation was but now I do thanks to Truelight, I was too lazy to get out my textbook haha)

[lexitu]

Awesome. Smiles all round

[slothpomba]

What SS are you guys aiming for?

[stonecold]

I used Heinemann, but how they first introduced how proteins are made was with some analogy (office, "photocopying", workers etc.) Grr okay, the analogy is fine, but I don't particularly like it

Hmm well... transcription occurs in the nucleus? mRNA is made and then goes out of the nucleus into the cytoplasm... to the ribsomes? tRNA then carries an anti-codon and something something something and then arranges the sequence of amino acids that fits into the coding of the mRNA? Oh god I'm so lost. I've looked up the meaning for translation multiple times but it doesn't seem to stick in my mind, probably because I still don't understand it

totally agree, their comparison of dna/rna to an office blows.  i'm really confused over the whole transcription, translation and tRNA, mRNA and rRNA.  might learn it properly over the weekend.