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This is a guest post from VCE student Katryna Induni for VCE Biology Unit 4 – Thanks Katryna! If you want to write a guest post on this blog, check out the information here.


Genes in Action


Genes are made of DNA that contains information in coded form
When genes are active, instructions are decoded and expressed in the phenotype
Eukaryotic organisms, instructions are decoded in cytoplasm of cell
Transcription- gene becomes active, makes a copy of the coded instructions it contains
This copy leaves the nucleus and moves to the cytoplasm to be decoded (translation)
Transcription: Copying the Original


DNA & RNA Compared


Three Types of RNA


- Messenger RNA (mRNA): carries genetic message to ribosomes...

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This is a guest post from VCE student Katryna Induni for VCE Biology Unit 4 - Thanks Katryna! If you want to write a guest post on this blog, check out the information here.


DNA
Deoxyribonucleic Acid
Make up genes
Double helix
Subunits: nucleotides
Each nucleotide has a sugar (deoxyribose), a phosphate part and a nitrogen containing base
4 different bases are Adenine, Thymine, Guanine & Cytosine
DNA is built from nucleotides joined together to make a chain
Chargaff’s rule: certain bases occur in equal proportions


Key Features of a double helix model of DNA


Each DNA molecule consists of 2 nucleotide chains
Chains run in opposite directions, said to be ‘anti-parallel’
Weak hydrogen bonds ...

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Hi all,


With the Unit 3 exams and the GAT around the corner I thought it would be timely to remind you all of some key resources that you can find on the VCAA website to help you with your VCE exam preparation.


1. VCAA exam timetable - duh...no kidding...of course you can find when the exam is on here with the timetable.


2. VCE exams navigator - you should have received a hard copy of this from school but it is a very detailed document which outlines everything from examination hall rules, to equipment you can bring in, etc, etc. Very important and very useful...


3. Copy of last years GAT (found here) -I have written about the GAT and the importance about it previously but it is in your best int...

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This is a guest post from former VCE student Olivia Anderson for VCE Biology. If you want to contribute your own VCE resources check out the guidelines here. Thanks Olivia!


AOS 2: Change Over Time


Adaptations: a feature of an organism that helps it to survive- that is, live long enough to produce viable offspring. Includes structure, behaviour, physiological mechanisms and biochemical reactions


Adaptive radiation: the process where organisms that have a recent common ancestor develop different adaptations in response to different environmental selection pressures


Allele frequency: the relative number of an allele in a population


Allopatric speciation: the process of formation of one or more new s...

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This is a guest post from former VCE student Olivia Anderson for VCE Biology. If you want to contribute your own VCE resources check out the guidelines here. Thanks Olivia!


Allele: a variation of a gene


Anaphase: the phase of cell division where the chromosomes more to the poles of the new cells


Aneuploidy: an abnormal number of chromosomes- eg. Too many or too few


Anticodon: a sequence of three nucleotides on a molecules of tRNA that is complementary to the base sequences on a codon of mRNA


Apoptosis: programmed cell death


Autosomal: relating to the autosome: any non-sex chromosome


Barr body: the inactive X chromosome in non-dividing nuclei of females


Binary fission: a type of cell reproduction of ...

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Congrats on finishing up the Bus Man exam. For many of you I’m sure it was your last exam!


Yee haa. How do you think you went?


What was good and bad about the exam?


Let everyone know your thoughts here but please keep them clean. Thanks and cheers

Hi all, so you’ve completed the Unit 4 VCE Biology exam for 2012.


What did you think of the paper? What was hard? What was easy? How do you think you went?


Let us know your thoughts and comments below (please keep them clean - all comments are moderated anyway!)…cheers

Hi all,


Congratulations on finishing the Unit 3 VCE Biology exam for 2012.


What did you think of the paper? What was hard? What was easy? How do you think you went?


Let us know your thoughts and comments below (please keep them clean - all comments are moderated anyway!)…cheers

Hi all,


Congratulations on finishing the Unit 3 VCE Biology exam for 2011. What did you think of the paper? What was hard? What was easy? How do you think you went?


Let us know your thoughts and comments below (please keep them clean!)…cheers


Find this helpful?

Hi all,


so you’ve completed the Unit 4 VCE Biology exam for 2011.


What did you think of the paper? What was hard? What was easy? How do you think you went?


Let us know your thoughts and comments below (please keep them clean!)…cheers

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