VCE Biology Question Thread

[RazzMeTazz]

When you do! please let us know

Sure! So far, I've only been able to find that Carbon-14 is up to 50,000 years ago according to VCAA.
If I Find the rest, I'll definitely let everyone know

[RazzMeTazz]

I don't quite understand this question.

The correct answer is C.

Explanations would be great

[RazzMeTazz]

Are enzymes (regardless of if their function is intracellular or extracellular) produced on the Rough Endoplasmic Reticulum?

[Rishi97]

I don't quite understand this question.

The correct answer is C.

Explanations would be great

This question is a bit different to the other ones we have seen. Instead of adding them and subtracting from 100 like we normally do, you basically just have to look at the numbers. If there is 12% of cytosine, there must also be 12% of guanine due to complementary base pairing.

[Reus]

This question is a bit different to the other ones we have seen. Instead of adding them and subtracting from 100 like we normally do, you basically just have to look at the numbers. If there is 12% of cytosine, there must also be 12% of guanine due to complementary base pairing.

This is what I thought however the question asks about cytesine not cytosine :/ unless this is a typo... Even if it was, there's 64% A-T hence if it's C, there's 24% G-C...  A total of 88%. Which is incorrect. I'm confused with thus question too haha

[vox nihili]

I don't quite understand this question.

The correct answer is C.

Explanations would be great

Wow they've cocked that one up... It is cytosine for one and there is 12% of it, 12% of guanine (or I guess that'd be glutamine according to them), 38% each of A and T

Are enzymes (regardless of if their function is intracellular or extracellular) produced on the Rough Endoplasmic Reticulum?

No, they can be produced by free ribosomes.

[millie96]

how do lethal alleles interfere with inheritance ratios?

[grannysmith]

You'd only get phenotypic ratio of 2:1 in the offspring, as usually either homozygous recessive or dominant is lethal regarding lethal alleles.
Edit: this occurs when crossing heterozygotes.

[Rishi97]

This is what I thought however the question asks about cytesine not cytosine :/ unless this is a typo... Even if it was, there's 64% A-T hence if it's C, there's 24% G-C...  A total of 88%. Which is incorrect. I'm confused with thus question too haha

omg you are so right. Can't believe I misread the whole question haha

[Reus]

omg you are so right. Can't believe I misread the whole question haha

Hopefully this warns you in the real exam!

[katiesaliba]

Can someone please help me with the attached question from the 2009 VCAA exam 1. I understand that species X will shed its leaves, but VCAA's explanation as to why has confused me. 

Also, if you get a mid-range A+ on the bio exam will that guarantee a 40+? 

Thanks!

[dankfrank420]

As long are your SACs aren't terrible, then mid-A+ will get you that 40.

[katiesaliba]

As long are your SACs aren't terrible, then mid-A+ will get you that 40.

What if my unit 3 SAC mark was 93% and therefore not an A+ (1% off )? 

[RazzMeTazz]

Wow they've cocked that one up... It is cytosine for one and there is 12% of it, 12% of guanine (or I guess that'd be glutamine according to them), 38% each of A and T

No, they can be produced by free ribosomes.

Ohh okay haha makes more sense now.

Thanks!

[dankfrank420]

What if my unit 3 SAC mark was 93% and therefore not an A+ (1% off )? 

Your raw mark doesn't matter.

Worrying about pre-moderation SAC marks is pointless. It could scale up to 100% or scale down to 80%. Depends on your ranking/cohort strength.

Edit: Last year, the cohort average from my school for bio went up from 72% to 89% just because they performed well on the exam.