Login

Welcome, Guest. Please login or register.

March 29, 2024, 03:20:43 am

Author Topic: VCE Biology Question Thread  (Read 3570687 times)  Share 

0 Members and 6 Guests are viewing this topic.

EllingtonFeint

  • Trendsetter
  • **
  • Posts: 153
  • Offering private tutoring ✨
  • Respect: +24
Re: VCE Biology Question Thread
« Reply #11325 on: November 01, 2018, 02:04:49 pm »
0
Is a baseline kinda the same as a control?
Biology 🌱 [49] |  English [47]

Surviving and Succeeding in Biology:
https://atarnotes.com/forum/index.php?topic=187145.msg1129188

Sine

  • Werewolf
  • National Moderator
  • Great Wonder of ATAR Notes
  • *****
  • Posts: 5135
  • Respect: +2103
Re: VCE Biology Question Thread
« Reply #11326 on: November 01, 2018, 02:06:25 pm »
0
Hi,

What is meant by RNA processing in prokaryotes?

What is the function of rRNA?

Thanks
There is no real substantial RNA processing for prokaryotes but there is significant processing for eukaryotes

rRNA is ribosomal RNA and is the RNA component associated with ribosomes.

Hiea

  • Trailblazer
  • *
  • Posts: 32
  • Respect: +7
Re: VCE Biology Question Thread
« Reply #11327 on: November 01, 2018, 02:07:11 pm »
+1
Is a baseline kinda the same as a control?

I think so? To my knowledge, the control group provides a baseline result to which other results can be compared to, so you can determine the effect of the independent variable.
2018 - 2019 : Biology [45] Japanese SL [45] JLPT N2
2020 - : BMedSc/MD @ Monash University

Erutepa

  • VIC MVP - 2019
  • Forum Leader
  • ****
  • Posts: 721
  • evenin'
  • Respect: +775
Re: VCE Biology Question Thread
« Reply #11328 on: November 01, 2018, 02:09:19 pm »
0
Hi,

What is meant by RNA processing in prokaryotes?

What is the function of rRNA?

Thanks
Relevant to our course, in prokaryotes, no RNA processing occurs as prokaryotic DNA does not include 'introns' and thus no modifications/splicing need occur. (Is this answering your question?)

rRNA (ribosomal RNA) is a structural component of the ribosome along with proteins.
Is a baseline kinda the same as a control?
Yes. Both serve to establish data for the comparison of subsequent tests where the IV is changed.
« Last Edit: November 01, 2018, 02:11:02 pm by Erutepa »
Qualifications
 > Have counted to 227
 > Can draw really good spiders
 > 2 Poet points
 > 6.5 insanipi points
 > 1 Bri MT point

galaxy21

  • Trendsetter
  • **
  • Posts: 150
  • Respect: +23
Re: VCE Biology Question Thread
« Reply #11329 on: November 01, 2018, 02:11:42 pm »
+2
What does taking " a qualitative approach when identifying and analysing experimental data" mean? Also wow, I guess these kinds of threads always blow up right before the exam, huh?  ;D

Pretty sure this just means to visual observations and descriptions rather than numbers and data to identify and analyse experimental data.
So if you were to look at bacterial growth across an agar plate, you could look at the the structure of the growth (e.g. completely covering the agar plate vs in small colonies), rather than the size (e.g. 12 colonies of 11mm diametre)

And yeah I was thinking the same thing - I replied to something the other day and in the process of me typing out a reply, there were 14 others already.  :o

Hi,

What is meant by RNA processing in prokaryotes?

What is the function of rRNA?

Thanks
rRNA (ribosomal RNA) is what makes up ribosomes. It has a role in organising and catalysing the synthesis of proteins
As for RNA processing, this page (https://www.encyclopedia.com/science-and-technology/biology-and-genetics/genetics-and-genetic-engineering/rna-processing ) seems to have a lot of information on it. Someone else might have to help with this though because I am not entirely sure how it all works.
2018 - Biology, Further
2019 - English, Chemistry, Methods, Health and Human Development
2020 - Bachelor of Science (Melbourne Uni)

Hirul1280

  • Adventurer
  • *
  • Posts: 15
  • Respect: 0
Re: VCE Biology Question Thread
« Reply #11330 on: November 01, 2018, 02:17:12 pm »
0
Why do vaccination programs exist? Are these reasons acceptable?
- Prevent an outbreak of a disease
- Eradication of the disease
- Prevent the disease from spreading
- Herd Immunity



galaxy21

  • Trendsetter
  • **
  • Posts: 150
  • Respect: +23
Re: VCE Biology Question Thread
« Reply #11331 on: November 01, 2018, 02:18:40 pm »
0
Why do vaccination programs exist? Are these reasons acceptable?
- Prevent an outbreak of a disease
- Eradication of the disease
- Prevent the disease from spreading
- Herd Immunity
Look good to me.
2018 - Biology, Further
2019 - English, Chemistry, Methods, Health and Human Development
2020 - Bachelor of Science (Melbourne Uni)

Sine

  • Werewolf
  • National Moderator
  • Great Wonder of ATAR Notes
  • *****
  • Posts: 5135
  • Respect: +2103
Re: VCE Biology Question Thread
« Reply #11332 on: November 01, 2018, 02:18:55 pm »
+1
Why do vaccination programs exist? Are these reasons acceptable?
- Prevent an outbreak of a disease
- Eradication of the disease
- Prevent the disease from spreading
- Herd Immunity



yeah those are some of the main points
Maybe in addition to this it would be good to reference along with "prevent the disease from spreading" that this protects those that are most vulnerable in society e.g. neonates, the elderly + people who can't get vaccinated.

PhoenixxFire

  • VIC MVP - 2018
  • Honorary Moderator
  • ATAR Notes Legend
  • *******
  • Posts: 3695
  • They/them/theirs
  • Respect: +3102
Re: VCE Biology Question Thread
« Reply #11333 on: November 01, 2018, 02:19:05 pm »
0
Why do vaccination programs exist? Are these reasons acceptable?
- Prevent an outbreak of a disease
- Eradication of the disease
- Prevent the disease from spreading
- Herd Immunity
Yep
2019: B. Environment and Sustainability/B. Science @ ANU
2020: Just Vibing
2021: B. Paramedicine/B. Nursing @ ACU Canberra

AISHAB

  • Trailblazer
  • *
  • Posts: 42
  • Respect: +4
Re: VCE Biology Question Thread
« Reply #11334 on: November 01, 2018, 02:20:16 pm »
0
Relevant to our course, in prokaryotes, no RNA processing occurs as prokaryotic DNA does not include 'introns' and thus no modifications/splicing need occur. (Is this answering your question?)

rRNA (ribosomal RNA) is a structural component of the ribosome along with proteins.Yes. Both serve to establish data for the comparison of subsequent tests where the IV is changed.

Yes it does thanks. Is that all we need to know about RNA processing in terms of our study design?

PhoenixxFire

  • VIC MVP - 2018
  • Honorary Moderator
  • ATAR Notes Legend
  • *******
  • Posts: 3695
  • They/them/theirs
  • Respect: +3102
Re: VCE Biology Question Thread
« Reply #11335 on: November 01, 2018, 02:22:26 pm »
+1
Yes it does thanks. Is that all we need to know about RNA processing in terms of our study design?
Yeah. You just need to know that prokaryotes don’t do RNA processing
2019: B. Environment and Sustainability/B. Science @ ANU
2020: Just Vibing
2021: B. Paramedicine/B. Nursing @ ACU Canberra

Sine

  • Werewolf
  • National Moderator
  • Great Wonder of ATAR Notes
  • *****
  • Posts: 5135
  • Respect: +2103
Re: VCE Biology Question Thread
« Reply #11336 on: November 01, 2018, 02:23:03 pm »
0
Yes it does thanks. Is that all we need to know about RNA processing in terms of our study design?
yep, for eukaryotes know that they splice out introns and add a 5' methyl cap and 3' poly A tail

galaxy21

  • Trendsetter
  • **
  • Posts: 150
  • Respect: +23
Re: VCE Biology Question Thread
« Reply #11337 on: November 01, 2018, 02:23:57 pm »
0
So in the 2018 NHT VCAA exam, the first short answer question provides this information and asks:
Two students noticed bubbles forming on the submerged leaves of an Elodea plant growing in an
aquarium. The bubbles seen on the leaves were the result of a gas formed within the cells of the
leaves. The photograph below shows the appearance of these bubbles.
There was a bright light shining on the aquarium. The bright light was not affecting the temperature
of the water.
a. Describe what occurs within the cells of the leaves to result in the formation of these bubbles. (3 marks)


In my answer I talked about how it could be oxygen from photosynthesis or carbon dioxide from cellular respiration, however in the answers, it says:
Chlorophyll absorbs light energy, water is split to form hydrogen ions or oxygen gas, and oxygen
will diffuse out through the plasma membrane.


Is cellular respiration not also a potential cause of these bubbles?
2018 - Biology, Further
2019 - English, Chemistry, Methods, Health and Human Development
2020 - Bachelor of Science (Melbourne Uni)

Hirul1280

  • Adventurer
  • *
  • Posts: 15
  • Respect: 0
Re: VCE Biology Question Thread
« Reply #11338 on: November 01, 2018, 02:25:45 pm »
0
Nope - anaerobic respiration is the step of glycolosis and it never occurs in the mitochondria, and even in anaerobic respiration, glycolysis doesn't occur in the mitochondria.
Instead, it occurs in the cytosol of the cell.
Also remember that fermentation occurs in bacteria (and yeast), and bacteria do not have a mitochondria, so that makes it a little hard to occur there... ;)

Yeast cells are Eukaryotic, they do have mitochondria. Only muscle cells undergo lactic acid fermentation (Pyruvate --> Lactic Acid by NADH). However, in yeast cells pyruvate is broken down into acetylaldehyde (intermediate substance) + Carbon dioxide gas. The acetylaldehyde is converted to ethanol by NADH (You do not need to know this, just for clarification)

Mod edit (PF): I’ve fixed the quote so that your text appears below it to make it clear what you’re adding :)
« Last Edit: November 01, 2018, 02:30:26 pm by PhoenixxFire »

PhoenixxFire

  • VIC MVP - 2018
  • Honorary Moderator
  • ATAR Notes Legend
  • *******
  • Posts: 3695
  • They/them/theirs
  • Respect: +3102
Re: VCE Biology Question Thread
« Reply #11339 on: November 01, 2018, 02:27:14 pm »
+1
It could be but given the question mentions leaves and light I’d say they wanted you to talk about photosynthesis.

Also likely that given the bright light, all the CO2 is being immediately used up in photosynthesis
« Last Edit: November 01, 2018, 02:56:35 pm by PhoenixxFire »
2019: B. Environment and Sustainability/B. Science @ ANU
2020: Just Vibing
2021: B. Paramedicine/B. Nursing @ ACU Canberra