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July 17, 2019, 09:14:05 am

Author Topic: VCE Biology Question Thread  (Read 1260896 times)  Share 

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kingy123

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Re: VCE Biology Question Thread
« Reply #8160 on: September 20, 2016, 02:14:27 pm »
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Whats the difference between the quaternary and tertiary structure of  protein?

ezferns

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Re: VCE Biology Question Thread
« Reply #8161 on: September 20, 2016, 02:17:44 pm »
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Quote
Whats the difference between the quaternary and tertiary structure of  protein?

Oh oh! I know this one.

Tertiary structure in proteins is the overall 3D structure of a single polypeptide chain whereas quaternary structure is the 3D structure of more than one polypeptide chain.
Basically, tertiary is one polypeptide and quaternary is more than one.
All proteins have tertiary structure but not all have quaternary structure.

HasibA

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Re: VCE Biology Question Thread
« Reply #8162 on: September 20, 2016, 02:34:58 pm »
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main difference between between hominid and hominin? thanks :)
More q's:
1)bipedal ism is simply the ability to walk on two (hind) legs. correct?
2) 'what feature would enable an observer to conclude the individual was bipedal' - i was going to talk about cranial capacity etc. is this on the right tangent? thanks :)

« Last Edit: September 20, 2016, 02:44:03 pm by HasibA »
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K888

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Re: VCE Biology Question Thread
« Reply #8163 on: September 20, 2016, 03:03:36 pm »
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main difference between between hominid and hominin? thanks :)
More q's:
1)bipedal ism is simply the ability to walk on two (hind) legs. correct?
2) 'what feature would enable an observer to conclude the individual was bipedal' - i was going to talk about cranial capacity etc. is this on the right tangent? thanks :)
As far as I know:
Hominid - all modern and extinct great apes - gorillas, chimpanzees, orangutans and humans, etc. but not gibbons
Hominin  - all humans & extinct human ancestors (basically a branch of hominids)

In regards to question 2, from what I understand these are some things you can dicuss:
- position of the foramen magnum
- valgus angle
- pelvis structure (shorter and broader)
- length of lower limbs (longer in bipedals)
- spine curvature
- structure of ribcage
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gameboy99

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Re: VCE Biology Question Thread
« Reply #8164 on: September 20, 2016, 03:07:12 pm »
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Quite curious how many practice exams people have done so far and are aiming to get before the exams???
I have done 10 and planning to do 30??
How about you guys?? :D
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sweetcheeks

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Re: VCE Biology Question Thread
« Reply #8165 on: September 20, 2016, 03:22:32 pm »
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Quite curious how many practice exams people have done so far and are aiming to get before the exams???
I have done 10 and planning to do 30??
How about you guys?? :D

I've done 2 so far (not including unit 3 exams) and aiming for about 10. I would like to do as many as possible, but it is hard finding quality exams that are similarly structured to the actual exam and cover suitable content.

HasibA

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Re: VCE Biology Question Thread
« Reply #8166 on: September 20, 2016, 03:24:32 pm »
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Quite curious how many practice exams people have done so far and are aiming to get before the exams???
I have done 10 and planning to do 30??
How about you guys?? :D
probs as many as i can, mainly using them to target what i dont know, and revise that (targeted revision)- done like 1 so far, and probs gonna get thorugh as many as i can :)
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hodang

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Re: VCE Biology Question Thread
« Reply #8167 on: September 20, 2016, 05:00:42 pm »
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Homeostasis is very important and negative feedback helps maintain it. Defs worth learning (I'm in the process of relearning all this stuff rn!)
4) Positive feedback won't come up as much because there's few examples, someone else can confirm though :)
5) You shouldn't lose marks for stating 36-38 ATP or ADP +Pi, it makes logical sense.
Hope I helped :)


Thankyou soo much!! However as for the homeostasis bit, on the frequently asked questions (on the vcaa website) they said they took homeostasis out? Which explains why it wasn't in my sac either... Is this true?

geminii

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Re: VCE Biology Question Thread
« Reply #8168 on: September 20, 2016, 05:07:37 pm »
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If 12 H2O is an input in the light dependent reaction in photosynthesis, should I add 6H2O as one of the outputs? If so, is 6H2O an output of the light dependent or light independent stage?

Bump! Could someone please help with this? :)
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blacksanta62

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Re: VCE Biology Question Thread
« Reply #8169 on: September 20, 2016, 06:08:32 pm »
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Bump! Could someone please help with this? :)
For the full equation where you place 12H2O as an input, yes, 6H2O must be an output
6CO2 + 12H2O ----> C6H12O6 + 6O2 + H2O


Thankyou soo much!! However as for the homeostasis bit, on the frequently asked questions (on the vcaa website) they said they took homeostasis out? Which explains why it wasn't in my sac either... Is this true?
My SAC had some homeostasis on it so hopefully someone else can confirm :) But since negative feedback is the driving force for bringing things back into strict limits I would think mentioning homeostasis in one way or another would be necessary.

Edit: In VCE water isn't an output of either, rather it's split into H+ and e- + O2 in the light dependent stage. So, it isn't an output of either stage (for VCE anyway, maybe vox can lend some insight) :)
« Last Edit: September 20, 2016, 08:33:17 pm by blacksanta62 »
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geminii

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Re: VCE Biology Question Thread
« Reply #8170 on: September 20, 2016, 06:53:05 pm »
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For the full equation where you place 12H2O as an input, yes, 6H2O must be an output

But is it an output of the light dependent stage or the light independent stage?
"If you win silver, sooner or later, you will be forgotten. If you win gold, you will be an example, and examples are given, not forgotten."
- Dangal


2016-17 (VCE): Biology, HHD, English, Methods, Specialist, Chemistry
2018-22: Bachelor of Mechanical Engineering (Honours) / Bachelor of Biomedical Science @ Monash Uni

2019 MEC2404 | ENG2005 | BMS1042 | BMS1062

blacksanta62

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Re: VCE Biology Question Thread
« Reply #8171 on: September 20, 2016, 08:32:26 pm »
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But is it an output of the light dependent stage or the light independent stage?
I answered in my edit when I noticed
It's an output of neither :)
Edit: I put it in bold
« Last Edit: September 20, 2016, 08:34:08 pm by blacksanta62 »
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HasibA

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Re: VCE Biology Question Thread
« Reply #8172 on: September 20, 2016, 08:54:59 pm »
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few questions guys, are the following on the course:
1) knowing what wavelengths of light chlorophyll absorbs and essentially a focus on wavelength absorption and its implications (linked in with some other relevant topics, but more so just a focus on wavelengths) ? had a lot of this on the STAV 2013 unit 3/4 exam  and wasn't sure if it was a key point.

2) i manage to complete exams in like 75% of time the allotted, what is a good use of the time i have left over? checking answers or simply rethinking some questions? for example, i finished a reg unit 3/4 exam in like 1hr 30minutes (but i did have gaps in knowledge so couldn't be happy with all my responses)

3) is the 'plasmodesmata' on the course? came up in the 2013 STAV exam -.-
4) did i have to know the specific term 'transgenic organism' - again on a STAV exam :( it was the 'general name given to an organism that contains genes from another species' and i had never heard of that term prior :P
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blacksanta62

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Re: VCE Biology Question Thread
« Reply #8173 on: September 20, 2016, 09:13:17 pm »
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few questions guys, are the following on the course:
1) knowing what wavelengths of light chlorophyll absorbs and essentially a focus on wavelength absorption and its implications (linked in with some other relevant topics, but more so just a focus on wavelengths) ? had a lot of this on the STAV 2013 unit 3/4 exam  and wasn't sure if it was a key point.

2) i manage to complete exams in like 75% of time the allotted, what is a good use of the time i have left over? checking answers or simply rethinking some questions? for example, i finished a reg unit 3/4 exam in like 1hr 30minutes (but i did have gaps in knowledge so couldn't be happy with all my responses)

3) is the 'plasmodesmata' on the course? came up in the 2013 STAV exam -.-
4) did i have to know the specific term 'transgenic organism' - again on a STAV exam :( it was the 'general name given to an organism that contains genes from another species' and i had never heard of that term prior :P
1) You don't need to know the exact wave number that chlorophyll absorbs best at. You do have to know that it shows the complementary colour that it absorbs. So, if the plant is green, it most likely absorbs best at blue and red wavelengths the best.
See attached question
2) I'm doing my first practice exam tomorrow morning in timed conditions. So you've already had practice which is good. I suggest that you go through the paper again, finishing any questions you couldn't/having a crack at those you don't remember. Read your answers quietly to yourself so that you can hear if it makes sense or not.
Just my tips :)
3) I remember hearing/reading it in the NOB 2 but I can't remember what it is. Searched on google and it's how plants communicate with each other. Someone else can clarify this though
4) Yes. My SAC is partially on this and you should know it. I haven't come across it in papers yet (because I haven't done any  ::)) but know it
:)

Note: With the attached question, having both there resulted in students choosing either red or blue and red (Q) being correct. The 2nd attachment says otherwise. But this is contentious in nature and up to you to decide.
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HasibA

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Re: VCE Biology Question Thread
« Reply #8174 on: September 20, 2016, 09:19:28 pm »
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1) You don't need to know the exact wave number that chlorophyll absorbs best at. You do have to know that it shows the complementary colour that it absorbs. So, if the plant is green, it most likely absorbs best at blue and red wavelengths the best.
See attached question
2) I'm doing my first practice exam tomorrow morning in timed conditions. So you've already had practice which is good. I suggest that you go through the paper again, finishing any questions you couldn't/having a crack at those you don't remember. Read your answers quietly to yourself so that you can hear if it makes sense or not.
Just my tips :)
3) I remember hearing/reading it in the NOB 2 but I can't remember what it is. Searched on google and it's how plants communicate with each other. Someone else can clarify this though
4) Yes. My SAC is partially on this and you should know it. I haven't come across it in papers yet (because I haven't done any  ::)) but know it
:)

Note: With the attached question, having both there resulted in students choosing either red or blue and red (Q) being correct. The 2nd attachment says otherwise. But this is contentious in nature and up to you to decide.
THANKS BLACK SANTA <3

btw, what the best way to track mistakes and such? should i download evernote and write all my mistakes i make with my friends and shizzz? ty ty
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