VCE Biology Question Thread

[alondouek]

same here
i got 109/110 tho
not sure if i should be pleased or worried considering the exams are in four days

Be pleased but keep working hard. It's great that you're scoring well in practice exams but equally important to make sure you've covered all examinable knowledge because there's obviously only a certain amount of crossover between exams.

Keep up the good work!

[anat0my]

Can someone please explain question 26 of MC '13 ? thanks.

[RazzMeTazz]

For this question (From the 2010 VCAA Unit 3 Exam) the correct answer is D, as lipids such as waxes on leaves work to reduce water loss and dehydration.

I thought the answer would be A, as carotenoids capture certain wavelengths of light in photosynthesis?

Does that mean technically carotenoids are not considered lipids by VCAA? Some websites are telling me they are lipids .. ?

[darkknight98]

Be pleased but keep working hard. It's great that you're scoring well in practice exams but equally important to make sure you've covered all examinable knowledge because there's obviously only a certain amount of crossover between exams.

Keep up the good work!

Thanks man
Uh...one more thing
Should we relax on thursday (the day before our exam) or spend some time on revising notes/summaries
What did you guys as past students for biology do to cope with the suspense, stress and excitement for the exam?
Should we treat this as any other day, or should we skip school and relax, etc

[mahler004]

Thanks man
Uh...one more thing
Should we relax on thursday (the day before our exam) or spend some time on revising notes/summaries
What did you guys as past students for biology do to cope with the suspense, stress and excitement for the exam?
Should we treat this as any other day, or should we skip school and relax, etc

It's more important that you get a good night's sleep. Realistically, if you don't know it twelve hours before the exam, you won't know it in the exam.

[Reus]

Can someone please explain question 26 of MC '13 ? thanks.

Do a test cross between MRS x M'R'S'.
Once this is done, the gene locus will code for 7cm each as the letter with no apostrophe is dominant.
7+7+7=21cm thus it is C.

[darkknight98]

It's more important that you get a good night's sleep. Realistically, if you don't know it twelve hours before the exam, you won't know it in the exam.

yeh true
personally i don't plan on revising the day before the exam
just wanted to know other people's advice on the matter

[darkknight98]

Do a test cross between MRS x M'R'S'.
Once this is done, the gene locus will code for 7cm each as the letter with no apostrophe is dominant.
7+7+7=21cm thus it is C.

does this mean that the letter with an apostrophe (which is recessive) also contributes to the plants height
so 5 cm from the dominant allele and 2 cm for the recessive allele per letter for three letters to make 21cm
i did B thinking only the dominant allele will be expressed so 5+5+5=15cm

[Reus]

does this mean that the letter with an apostrophe (which is recessive) also contributes to the plants height
so 5 cm from the dominant allele and 2 cm for the recessive allele per letter for three letters to make 21cm
i did B thinking only the dominant allele will be expressed so 5+5+5=15cm

It a case of polygenic inheritance, in the stem of the question it says "each two alleles, which determine the height of a particular plant" so yes.

[darkknight98]

It a case of polygenic inheritance, in the stem of the question it says "each two alleles, which determine the height of a particular plant" so yes.

yes thank you
didnt see that
mb
it literally says its a "polygenic trait"
thanks man

[darkknight98]

and its height as well

[Reus]

yes thank you
didnt see that
mb
it literally says its a "polygenic trait"
thanks man

Haha learn from it! Don't do it on the real one

[AllG_]

Do we need to know about thermoluminescence as a technique for absolute dating?

[katiesaliba]

Do we need to know about thermoluminescence as a technique for absolute dating?

nope


In polygenic inheritance, why would an -- ++ phenotype be the same as an +- +- phenotype if + is dominant? Thanks

[ikiwi]

I'm guessing in that case each + allele contributes equally to the phenotype no matter what gene its on. Since they both have two + alleles, they will have the same phenotype. This wont always apply to all polygenic inheritance traits though.