2020 Biology Exam

[fwift52]

Does anyone have suggested answers for the mc?

really need this haha :/

[miyukiaura]

Also, for the question about the lactase mutation stuff, what sort of mutation did you guys say it was? I said germ line mutation

I said point/substituion mutation bc in the question it said cytosine was replaced with thymine. You'd probably still get the mark tho bc the mutation had to be inheritable

[Isaac S]

I said point/substituion mutation bc in the question it said cytosine was replaced with thymine. You'd probably still get the mark tho bc the mutation had to be inheritable

Couldn't it have been an inversion? Inversion could result in a single amino acid change

[miyukiaura]

Couldn't it have been an inversion? Inversion could result in a single amino acid change

i dont think so bc inversions usually involve large chunks a chromosome being reinserted 180 degrees whereas this one was just a single nucleotide. pre sure they didn't mention any amino acid change either?

[failingenglish]

Also, for the question about the lactase mutation stuff, what sort of mutation did you guys say it was? I said germ line mutation

hmm i said point substitution mutation bc it was just a substitution i thought, no frameshift

[Isaac S]

Ah darn I didn't realise it said a base substitution... Reckon they could still accept germ line or nah? If they're specifically looking for point

[failingenglish]

Hey guys, I was wondering what people wrote for the last question in regard to the safety precautions?

[ActivationEnergy]

Hey guys, I was wondering what people wrote for the last question in regard to the safety precautions?

I wrote something about avoiding sources of electrical conduction such as metal since you are using electric current to run the gel electrophoresis. I also wrote wearing a long-sleeve lab coat or safety goggles. I feel like when they asked for safety precautions they are referring to the approaches to avoid potential hazards or dangers.

[Cupcake2423]

Hey guys, I was wondering what people wrote for the last question in regard to the safety precautions?

i was quite stumped with this one
1. electrical safety with the current that was being run through the gel and keeping the equipment away from water
2. (hahaha i was so stumped), maintaining saftey precautions with the heating equipment that keeps the temp constant and ensuring that it is set to the correct temperaure (cuz too high could burn you)

thats what i wrote (not too great ik but it was such a not VCAA type question smh)

[failingenglish]

i was quite stumped with this one
1. electrical safety with the current that was being run through the gel and keeping the equipment away from water
2. (hahaha i was so stumped), maintaining saftey precautions with the heating equipment that keeps the temp constant and ensuring that it is set to the correct temperaure (cuz too high could burn you)

thats what i wrote (not too great ik but it was such a not VCAA type question smh)

LKMAO i literally wrote dont touch the gel while the current is running and wear a lab coat and glasses. hopefully they are gonna accept a range of answers lol

[donkey man]

Alright here's the thing. With the Denisovans question where u draw a branch, surely they allow a range of response as long as its possible for Denisovans to interbreed with Homo sapiens. That part of the study design is literally about how the evolutionary tree is up to interpretation soooo there can't really be a wrong (unless you draw Denisovans in a way where they couldn't interbreed with H sapiens. I guess it would make sense for VCAA to accept anything as well as it is justified well?? idk

[Flybird123]

Alright here's the thing. With the Denisovans question where u draw a branch, surely they allow a range of response as long as its possible for Denisovans to interbreed with Homo sapiens. That part of the study design is literally about how the evolutionary tree is up to interpretation soooo there can't really be a wrong (unless you draw Denisovans in a way where they couldn't interbreed with H sapiens. I guess it would make sense for VCAA to accept anything as well as it is justified well?? idk

i agree i think you just gotta draw the line up until it levels with neanderthal and homo sapiens

[fwift52]

i agree i think you just gotta draw the line up until it levels with neanderthal and homo sapiens

I don't think level. The neanderthal line should not have gone that far either. Those species are extinct so the line would finish earlier. Their tree was incorrect for both diagrams and hence the denisovans line should be able to yes interbreed but definitely not continue to the same point as the others.

[donkey man]

I don't think level. The neanderthal line should not have gone that far either. Those species are extinct so the line would finish earlier. Their tree was incorrect for both diagrams and hence the denisovans line should be able to yes interbreed but definitely not continue to the same point as the others.

Since they drew neanderthal to same level as H sapiens it should be fine to do the same with Denisovans. The problem is about where exactly to draw the line for Denisovans.

[Cupcake2423]

Do any of you guys have an idea of what kind of exam score correlates to an approx SS?