Biology hsc exam who ready!!

[ekoolish]

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Originally Posted by sam5

what were some of the questions in the independent trial? (just so i can tell if that was the one i did - mine was extremely easy - i got 97 lol).

I can't remember them exactly but they basically took a dot point from the syllabus and made it into a question. Hence making it so obvious to students what they were looking for in your answer. Damn 97 aih, what paper did you do?

[sam5]

Originally Posted by ekoolish

I can't remember them exactly but they basically took a dot point from the syllabus and made it into a question. Hence making it so obvious to students what they were looking for in your answer. Damn 97 aih, what paper did you do?

thats what i mean - im not sure what it was! Some questions had been replaced by past hsc questions (e.g. the 2008 question on experimental design for pathogens in drinking water was in there). There were quetions like:1. label three parts of the eye on this diagram 2. Explain with diagrams the differences between myopia and hyperopia3. A comparison of ecto and endotherms4. The adaptive advantgae of haemaglobin5. DNa replication

[bayan92]

Originally Posted by sam5

thats what i mean - im not sure what it was! Some questions had been replaced by past hsc questions (e.g. the 2008 question on experimental design for pathogens in drinking water was in there). There were quetions like:1. label three parts of the eye on this diagram 2. Explain with diagrams the differences between myopia and hyperopia3. A comparison of ecto and endotherms4. The adaptive advantgae of haemaglobin5. DNa replication

http://mscw.catholic.edu.au/Assessme...nt/Biology.pdf

[Liyo]

Who's ready or biology tomorrow? ahh...>_<"!!!

[Brontecat]

ahh...>_<"!!!

+1

[ill_illusion]

im fucked

[Misz]

Originally Posted by ill_illusion

im fucked

I have two and a half topics to memorize by tomrrow!! Tell me whoes fucked.. Me me me :-(

[Harley Chan]

F'd in the A realllllllly bad....didn't realy pay attention all year & gotta learn all topics... FML

+ can anyone please explain to me the 'one gene-one protein' theory by Beadle and Tatum.... i honestly don't get it!

[Brontecat]

They were lead to their experiment by Thomas Morgan's eperiment with the Drosophila fruit fly (don't rlly remember how)

Then they used Neurospora crassa (bread mould) and 'attacked' half of their bread mould with X-rays and identified that under the influence of the rays the amino acid sequences underwent changes. So since this change affected the amino acid sequences the protein structures (produced after this time) also changed. They called this the one gene: one protein hypothesis.

Later, as more about cells and things were discovered scientists realised that proteins were made a step later than polypeptides. And that polypeptides were representative of any sequence of amino acids and therefore was a more accurate descritption of what had happened. It was then that the theory was revised in name to become the one gene: one polypeptide theory. As a better representation of all sequences rather than specialised sequences.

The experiment can account for the mutagenic nature of radiation as Beadle and Tatum observed permant, mutagenic changes within the mould. They noticed that the un-X-ray-exposed mould was still able to produce correct proteins whereas the X-ray affected mould would only do so under the influence of a solution designed to encourage protein synthesis.

[hollaholla]

Originally Posted by Harley Chan

F'd in the A realllllllly bad....didn't realy pay attention all year & gotta learn all topics... FML

+ can anyone please explain to me the 'one gene-one protein' theory by Beadle and Tatum.... i honestly don't get it!

Beedle and tatum experimented with bread mould. Now this bread mould normally has enzymes that enable certain vitamins to be produced. Theyy used xrays to cause mutations in one of the genees and found that some of th ebread moulds could no longer produce the enzyme for producing a particular vitamin. THey hypothesised that one gene must code for one enzyme. Since enzymes are made of protein---it became the one gene one protein hypothesis.

LAter it was found that some proteins consist of several polypeptides. Each different polyp was found to be determined by a different gene. so it became the ONE GENE ONE POLYPEPTIDE hypothesis.

[hollaholla]

Originally Posted by Brontecat

They were lead to their experiment by Thomas Morgan's eperiment with the Drosophila fruit fly (don't rlly remember how)

Then they used Neurospora crassa (bread mould) and 'attacked' half of their bread mould with X-rays and identified that under the influence of the rays the amino acid sequences underwent changes. So since this change affected the amino acid sequences the protein structures (produced after this time) also changed. They called this the one gene: one protein hypothesis.

Later, as more about cells and things were discovered scientists realised that proteins were made a step later than polypeptides. And that polypeptides were representative of any sequence of amino acids and therefore was a more accurate descritption of what had happened. It was then that the theory was revised in name to become the one gene: one polypeptide theory. As a better representation of all sequences rather than specialised sequences.

The experiment can account for the mutagenic nature of radiation as Beadle and Tatum observed permant, mutagenic changes within the mould. They noticed that the un-X-ray-exposed mould was still able to produce correct proteins whereas the X-ray affected mould would only do so under the influence of a solution designed to encourage protein synthesis.

lol soz didnt know you had already posted.

[possessionless]

glad to see im not the only one who's fucked.

[lizajane91]

pumped for this exam woot!

[hollaholla]

Originally Posted by possessionless

glad to see im not the only one who's fucked.

i dont get it....why are ppl *****? did you not study for the trials/in the holz?

[possessionless]

Originally Posted by hollaholla

i dont get it....why are ppl *****? did you not study for the trials/in the holz?

yes i did.
bio is my weakest subject though. i put the most effort in it and its still my weakest. i guess science just isnt my thing.
ranked like 5th or 6th which is good i guess but not in comparison to my other subjects.