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November 26, 2020, 07:26:23 am

Author Topic: VCE Biology Question Thread  (Read 1900209 times)  Share 

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Chocolatepistachio

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Re: VCE Biology Question Thread
« Reply #13050 on: September 30, 2020, 07:21:42 pm »
+2
I think itís 32 or 34 ATP you cant have 33

homeworkisapotato

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Re: VCE Biology Question Thread
« Reply #13051 on: September 30, 2020, 07:24:42 pm »
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Oh sweet thank you! So it's best to pick either 36 or 38 for the chemical equation, and 32 or 34 for the ETC? I tried searching for this question in the past VCAA exams and couldn't find it.
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Chocolatepistachio

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Re: VCE Biology Question Thread
« Reply #13052 on: September 30, 2020, 07:27:22 pm »
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Yes that is right for the chemical equation you just write 36 or 38

homeworkisapotato

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Re: VCE Biology Question Thread
« Reply #13053 on: October 01, 2020, 10:26:55 am »
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Hey! Just to be sure isolation is separating ill people from those without a disease to prevent spread and quarantine is separating and containing healthy people who have been/ may have been exposed to the disease right?
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Chocolatepistachio

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Re: VCE Biology Question Thread
« Reply #13054 on: October 01, 2020, 11:21:19 am »
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Yes thats right quarantine is when people have been somewhere and have been/may be infected with a disease and are therefore isolated from others.

Chocolatepistachio

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Re: VCE Biology Question Thread
« Reply #13055 on: October 01, 2020, 12:17:55 pm »
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For this question why can't it be c

homeworkisapotato

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Re: VCE Biology Question Thread
« Reply #13056 on: October 01, 2020, 12:22:57 pm »
+1
For this question why can't it be c
I think motility is ability for the organism to move around without help, and C says that the organism is not able to do so, so it is most likely not an animal.
What is the answer?
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Chocolatepistachio

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Re: VCE Biology Question Thread
« Reply #13057 on: October 01, 2020, 12:27:47 pm »
+4
But there are animals that canít move around like sponges

I donít know what the answer is. I donít actually  have the answers for this

homeworkisapotato

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Re: VCE Biology Question Thread
« Reply #13058 on: October 01, 2020, 12:29:50 pm »
+2
But there are animals that canít move around like sponges

I donít know what the answer is. I donít actually  have the answers for this
That's very true, you could be right then!
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Owlbird83

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Re: VCE Biology Question Thread
« Reply #13059 on: October 01, 2020, 12:32:04 pm »
+5
That's very true, you could be right then!
Yeah, I would say C, all the other options are wrong
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miyukiaura

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Re: VCE Biology Question Thread
« Reply #13060 on: October 02, 2020, 10:53:10 am »
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Slightly confused on why boosters are needed. I initially thought they were required to maintain the high levels of antibodies required for immunity against a certain disease, but the answers to a trial exam said that boosters are needed to produce more B memory cells as memory cells are short-lived. Don't memory cells last for long periods of time?

Thank you
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Chocolatepistachio

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Re: VCE Biology Question Thread
« Reply #13061 on: October 02, 2020, 11:32:20 am »
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Booster shots are administered to increase the amount of memory B cells for a specific antigen. Memory B cells gradually decline over time and booster shots can also cover any new strains or mutations

miyukiaura

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Re: VCE Biology Question Thread
« Reply #13062 on: October 02, 2020, 11:41:51 am »
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I've read that memory cells remain in lymphoid tissue for decades or even an entire lifetime so how would they gradually decline? Does it depend on the type of pathogen you're dealing with?
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Owlbird83

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Re: VCE Biology Question Thread
« Reply #13063 on: October 02, 2020, 12:22:51 pm »
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I've read that memory cells remain in lymphoid tissue for decades or even an entire lifetime so how would they gradually decline? Does it depend on the type of pathogen you're dealing with?
Although they have a long lifespan, memory cells can still die like any other cell, they aren't immortal, so the numbers would decrease overtime. I don't think it would depend on the pathogen, I googled it, and you wouldn't need to know this for bio, but I read that it depends on the type of vaccine (whether it's live/attenuated or inactivated, or subunits etc) for how much immunity they create and whether boosters are needed.
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ErnieTheBirdi

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Re: VCE Biology Question Thread
« Reply #13064 on: October 02, 2020, 08:17:50 pm »
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Could anyone tell me what would definitely be on an Evolution SAC? and how would I answer a natural selection question and get the full mark for it? Thanks Y'all