Login

Welcome, Guest. Please login or register.

March 29, 2024, 10:59:32 pm

Author Topic: VCE Biology Question Thread  (Read 3571694 times)  Share 

0 Members and 16 Guests are viewing this topic.

FatimaEl

  • Forum Regular
  • **
  • Posts: 59
  • 💕📒✏️💕
  • Respect: 0
Re: VCE Biology Question Thread
« Reply #8985 on: October 27, 2016, 09:34:00 pm »
0
Hope that was clear

Thank you so so much!!

MHC 1 markers are on all cells with an nucleus. Red blood cells don't have a nucleus therefore do not have MHC1 markers.
MHC 2 markers are only found on white blood cells, macrophages, b cells, t cells etc.

Yes dna is negatively charged and move towards the positive terminal when a electric current is applied.

Nope, if there is a 1:1:1:1 raio,it can suggest both independent assort or sex linked. However you can tell its linked, if the almost all the % of offspring have the parental gene and only a few who have the recombinant ones. You can also tell if its indepdently assorted when the proportion of offspring are all equal in number.

Well, co-dominant is when both alleles are equally expressed so for example, iAiB, making a AB blood type. Polygenes are when when traits are controlled by two or more genes. Really two different concepts :P

Test cross is used to determine whether the indivdual is heterozygous or homozygous by crossing it with a homozygous recessive. You only cross once, if u perform a test cross on a homozygous dominant, you'll know it isnt heterozygous based on the proportion of offsprings.

Thank you, that was very clear! 

Alrighty! im off to sleep early lol, good luck everyone!!!!! you got this!!! ;D ;D ;D ;D
2015: Further Mathematics
2016: English | Biology | Psychology | Health & Human Dev. | Text & Traditions
"verily with the hardship there is relief" – Quran 94:6

vox nihili

  • National Moderator
  • Great Wonder of ATAR Notes
  • *****
  • Posts: 5343
  • Respect: +1447
Re: VCE Biology Question Thread
« Reply #8986 on: October 27, 2016, 09:34:57 pm »
+3
All of you still up should really be going to bed, there's no point trying to cram anymore in!



GOOD LUCK TOMORROW EVERYONE


It has been an enormous pleasure answering your questions this year and I hope I've been able to make some things clearer for you. This particular question thread can be really overwhelming sometimes; so if you feel a bit like that, please don't. The standard of questions that everybody asks here just proves how smart all of you are. I'm absolutely certain that you'll smash the exam tomorrow :)))
2013-15: BBiomed (Biochemistry and Molecular Biology), UniMelb
2016-20: MD, UniMelb
2019-20: MPH, UniMelb
2021-: GDipBiostat, USyd

HasibA

  • Victorian
  • Forum Leader
  • ****
  • Posts: 652
  • Respect: +26
Re: VCE Biology Question Thread
« Reply #8987 on: October 27, 2016, 09:37:10 pm »
0
anyone can give a nice definiton of dna sequencing, and its use?
just lightly revising till i fall asleep hehe
Uni and life

plsbegentle

  • Victorian
  • Forum Obsessive
  • ***
  • Posts: 236
  • Respect: +18
Re: VCE Biology Question Thread
« Reply #8988 on: October 27, 2016, 09:38:08 pm »
+1
All of you still up should really be going to bed, there's no point trying to cram anymore in!



GOOD LUCK TOMORROW EVERYONE


It has been an enormous pleasure answering your questions this year and I hope I've been able to make some things clearer for you. This particular question thread can be really overwhelming sometimes; so if you feel a bit like that, please don't. The standard of questions that everybody asks here just proves how smart all of you are. I'm absolutely certain that you'll smash the exam tomorrow :)))
thank you sir!
2016: Biology [47]
2017: Methods[43] Chemistry [45] Accounting [31] English [39] Specialist [35]
ATAR:98.30
2018-2020: Bachelor of Biomedicine @The University Of Melbourne

homosapien

  • Guest
Re: VCE Biology Question Thread
« Reply #8989 on: October 27, 2016, 09:43:01 pm »
0
Could someone please give a definition and general role of MHC markes because i dont understand the difference between those and self / non self markers
Thanks :)

Yacoubb

  • Victorian
  • Forum Obsessive
  • ***
  • Posts: 216
  • Respect: +26
Re: VCE Biology Question Thread
« Reply #8990 on: October 27, 2016, 10:07:09 pm »
+2
Could someone please give a definition and general role of MHC markes because i dont understand the difference between those and self / non self markers
Thanks :)

MHC markers are essentially 'self' markers. They allow the immune system to recognise the tissue that belongs to it. On the other hand, antigens allow the immune system to detect matter as being 'non-self'. Once an antigen is detected, it is then capable of stimulating an immune response.

MHC II markers are found on APCs (antigen-presenting cells). When a macrophage engulfs and breaks down a pathogen, the antigen fragments will be presented on the MHC II markers, and the MHC markers will move to the macrophage membrane. When the whole macrophage then migrates to the lymph nodes, it can then present this to a helper-T cell, which through cytokine activation, can then go on to activate the humoral and cell-mediated immune responses.

MHC I markers are found on all nucleated cells (i.e. all somatic cells EXCEPT red blood cells). When a cell becomes infected with a pathogen, antigenic fragments will be processed and then added to MHC I markers. These MHC I markers then move to the membrane of this infected cell, and it will display those antigenic fragments to cytotoxic T-cells as part of the cell-mediated immune response. Once this occurs, cytotoxic T cells will be able to recognise the antigenic fragments, and then release perforin (and granzymes) which will inevitably kill the infected cell.

Hope that makes sense :)
2013-2014: VCE
2015-2017: BSc. at University of Melbourne. Majoring in Microbiology & Immunology.
2018: Honours - Restoring immunocompetency in Chronic Lymphocytic Leukemia
2019-2022: Doctor of Medicine (MD) at Deakin University

Completed VCE Biology in 2013 with a study score of 47. Offering tutoring in VCE Biology for 2020 in Geelong region! PM me for more details.

aristocrat

  • Fresh Poster
  • *
  • Posts: 3
  • Respect: 0
Re: VCE Biology Question Thread
« Reply #8991 on: October 28, 2016, 09:32:29 pm »
0
DOES VCAA CONSIDER RIBOSOMES AS ORGANELLES???? THANKS

The Usual Student

  • Forum Leader
  • ****
  • Posts: 713
  • Wisdom begins in wonder
  • Respect: +24
Re: VCE Biology Question Thread
« Reply #8992 on: October 28, 2016, 09:34:27 pm »
0
DOES VCAA CONSIDER RIBOSOMES AS ORGANELLES???? THANKS

yeppo dw u r fine

Gogo14

  • Forum Obsessive
  • ***
  • Posts: 377
  • when life gives you lemons... takeum and shareum
  • Respect: +6
Re: VCE Biology Question Thread
« Reply #8993 on: October 29, 2016, 08:49:02 am »
+2
Hey guys I want to thank everyone involved in this thread for helping me and many others throughout the year!!
I had a fever during the exam, so my brain turned to mush during the exam. I was a bit disappointed with my performance, but hopefully you guys did well.
Yea once again, thanks for answering all our questions, couldn't have made thru the year without this thread!!!
2016: Bio[45]
2017: Eng[43];Chem[47];Methods[49];Spesh[46];Physics[44]
2018+: B-Biomed @unimelb

PM if want help/advice | VCE tutoring available too- just PM

vox nihili

  • National Moderator
  • Great Wonder of ATAR Notes
  • *****
  • Posts: 5343
  • Respect: +1447
Re: VCE Biology Question Thread
« Reply #8994 on: October 29, 2016, 10:56:49 am »
0
Hey guys I want to thank everyone involved in this thread for helping me and many others throughout the year!!
I had a fever during the exam, so my brain turned to mush during the exam. I was a bit disappointed with my performance, but hopefully you guys did well.
Yea once again, thanks for answering all our questions, couldn't have made thru the year without this thread!!!

If you're really concerned that your fever disrupted your performance, you should really consider seeing the doctor and your year level coordinator about special consideration. I can't exactly remember the procedures anymore, but you'd need to act quickly.
Real bummer to hear that :\ I was really sick during all of my exams, so I can understand how frustrating it is to put in all that work during the year only to have that happen to you.
2013-15: BBiomed (Biochemistry and Molecular Biology), UniMelb
2016-20: MD, UniMelb
2019-20: MPH, UniMelb
2021-: GDipBiostat, USyd

Hydroxyl

  • Trendsetter
  • **
  • Posts: 115
  • Today is the tomorrow you worried about yesterday.
  • Respect: +8
Re: VCE Biology Question Thread
« Reply #8995 on: November 13, 2016, 01:49:42 pm »
0
Does anyone else miss Bio?
2016: Biology [41] | Further Mathematics [42]
2017: Chemistry [36] | Mathematical Methods [38] | English [44] | Psychology [50 + Premier's Award]
ATAR: 98.25
2018 - 2020: Bachelor of Science (Psychology) — The University of Melbourne
2021-2024: Doctor of Medicine — Griffith University (Gold Coast)
~ My Success is only from Allah ~

vox nihili

  • National Moderator
  • Great Wonder of ATAR Notes
  • *****
  • Posts: 5343
  • Respect: +1447
Re: VCE Biology Question Thread
« Reply #8996 on: November 13, 2016, 02:01:30 pm »
0
Does anyone else miss Bio?

Yessss.

Has anyone got some fun bio facts to share?
2013-15: BBiomed (Biochemistry and Molecular Biology), UniMelb
2016-20: MD, UniMelb
2019-20: MPH, UniMelb
2021-: GDipBiostat, USyd

Elizawei

  • Forum Obsessive
  • ***
  • Posts: 320
  • Respect: +42
Re: VCE Biology Question Thread
« Reply #8997 on: November 13, 2016, 02:17:50 pm »
+2

Has anyone got some fun bio facts to share?

Mitochondria is the powerhouse of the cell.

By the time you finish reading this sentence, about 8 million cells have died in your body.  :P
ATAR: 99.70
2017-2019: Bachelor of Biomedicine
2020-2023: Melbourne MD

Founder of Folding Our Futures
~ ~ ~ ~ ~ ~ ~ ~
Offering  Chemistry/Bio 3/4 tutoring for 2019! [raw 49, 47] PM me if interested :)

rosalie.brown

  • Guest
Re: VCE Biology Question Thread
« Reply #8998 on: November 13, 2016, 02:53:14 pm »
+6
Hi everyone!

It’s not often that I post on ATARNotes and I’d love to make a more regular contribution to the community – I hope to do so with this post!  :)

I completed Biology 3&4 this year and consulted this thread on a regular basis throughout the school year in preparation for each of my SACs and the end-of-year exam. To merely suggest that this thread has been ‘helpful’ is quite the understatement. I am in awe of the numerous members of the community (particularly Yacoubb, cosine, vox nihili, mtse, Elizawei, heidi, Sine, thushan, The Usual Student, Gogo14…agh, I could go on) who have so selflessly contributed to this thread and have assisted so many of us who have a genuine passion for and intend to do well in this subject.

I personally am not expecting a sensational result on December 12th; however I am certainly grateful for all of the assistance I have received simply by browsing the threads on a weekly basis. Although this post does not compare to the months of dedication and lengthy responses prepared by some truly wonderful members of this community, I hope it conveys my gratitude for all that you have done.

Thank you so very much.

Best of luck to all those who are yet to receive their results in the next month. I truly hope you receive the score you deserve – you’ve all worked so hard.

Not quite an interesting Biology fact, but certainly a series of truthful statements.  ;)

vox nihili

  • National Moderator
  • Great Wonder of ATAR Notes
  • *****
  • Posts: 5343
  • Respect: +1447
Re: VCE Biology Question Thread
« Reply #8999 on: November 13, 2016, 03:13:43 pm »
+1
Hi everyone!

It’s not often that I post on ATARNotes and I’d love to make a more regular contribution to the community – I hope to do so with this post!  :)

I completed Biology 3&4 this year and consulted this thread on a regular basis throughout the school year in preparation for each of my SACs and the end-of-year exam. To merely suggest that this thread has been ‘helpful’ is quite the understatement. I am in awe of the numerous members of the community (particularly Yacoubb, cosine, vox nihili, mtse, Elizawei, heidi, Sine, thushan, The Usual Student, Gogo14…agh, I could go on) who have so selflessly contributed to this thread and have assisted so many of us who have a genuine passion for and intend to do well in this subject.

I personally am not expecting a sensational result on December 12th; however I am certainly grateful for all of the assistance I have received simply by browsing the threads on a weekly basis. Although this post does not compare to the months of dedication and lengthy responses prepared by some truly wonderful members of this community, I hope it conveys my gratitude for all that you have done.

Thank you so very much.

Best of luck to all those who are yet to receive their results in the next month. I truly hope you receive the score you deserve – you’ve all worked so hard.

Not quite an interesting Biology fact, but certainly a series of truthful statements.  ;)

That's very sweet of you to say :) I know for my part at least it's certainly been a pleasure!




Fun biology fact: if you lie arm down with your palm facing upwards and clench your fist as tight as you can, you see the tendon of a muscle that doesn't function...it's an evolutionary remnant that's slowly disappearing from humans (some people won't have it!)
2013-15: BBiomed (Biochemistry and Molecular Biology), UniMelb
2016-20: MD, UniMelb
2019-20: MPH, UniMelb
2021-: GDipBiostat, USyd