Login

Welcome, Guest. Please login or register.

March 28, 2024, 07:11:44 pm

Author Topic: VCE Biology Question Thread  (Read 3570274 times)  Share 

0 Members and 4 Guests are viewing this topic.

nerdmmb

  • Guest
Re: VCE Biology Question Thread
« Reply #945 on: March 01, 2014, 08:14:48 pm »
0
To what extent do we need to know about photosynthesis?

alchemy

  • Victorian
  • Part of the furniture
  • *****
  • Posts: 1222
  • Respect: +25
Re: VCE Biology Question Thread
« Reply #946 on: March 01, 2014, 08:25:54 pm »
+1
To what extent do we need to know about photosynthesis?

I asked my teacher this yesterday and she said that we do need to know the inputs and outputs mainly, the conditions affecting it and a brief overview of what happens in each of the stages. They've toned photosynthesis down a lot in the study design so you don't need to know about C3 and C4 plants, and definitely don't need to know all those intermediates in the Calvin Cycle and even in the Kreb's cycle. Good question though, and I hope my answer will save you from wasting your time (:

nerdmmb

  • Guest
Re: VCE Biology Question Thread
« Reply #947 on: March 01, 2014, 08:36:28 pm »
0
I asked my teacher this yesterday and she said that we do need to know the inputs and outputs mainly, the conditions affecting it and a brief overview of what happens in each of the stages. They've toned photosynthesis down a lot in the study design so you don't need to know about C3 and C4 plants, and definitely don't need to know all those intermediates in the Calvin Cycle and even in the Kreb's cycle. Good question though, and I hope my answer will save you from wasting your time (:

Thanks alchemy! It sure will :)

nerdmmb

  • Guest
Re: VCE Biology Question Thread
« Reply #948 on: March 01, 2014, 08:51:12 pm »
0
Can someone please explain how cis and trans fats work?
Do we need to know about them in the course?

vox nihili

  • National Moderator
  • Great Wonder of ATAR Notes
  • *****
  • Posts: 5343
  • Respect: +1447
Re: VCE Biology Question Thread
« Reply #949 on: March 01, 2014, 09:11:26 pm »
+2
Can someone please explain how cis and trans fats work?
Do we need to know about them in the course?

Something you definitely don't need to know. In fact, it's not even covered in the chemistry course, not until first year of Uni. It's about the arrangement of the bond though. Cis-fats have a larger kink than trans-fats. Trans-fats are therefore normally more solid than cis-fats.

2013-15: BBiomed (Biochemistry and Molecular Biology), UniMelb
2016-20: MD, UniMelb
2019-20: MPH, UniMelb
2021-: GDipBiostat, USyd

Chang Feng

  • Victorian
  • Forum Obsessive
  • ***
  • Posts: 218
  • Respect: 0
Re: VCE Biology Question Thread
« Reply #950 on: March 01, 2014, 10:19:46 pm »
0
I understand how for steroid hormones they eventually attach to receptors to hormone- receptor complexes, and then this attached to gene to create mRNA for protein. But for peptide hormones how does it eventually cause changes in cytoplasmic function/ gene transcription, I understand that the hormone attaches to receptor on membrane which amplifies it but then I'm sorta confused after here

vox nihili

  • National Moderator
  • Great Wonder of ATAR Notes
  • *****
  • Posts: 5343
  • Respect: +1447
Re: VCE Biology Question Thread
« Reply #951 on: March 01, 2014, 10:24:49 pm »
0
I understand how for steroid hormones they eventually attach to receptors to hormone- receptor complexes, and then this attached to gene to create mRNA for protein. But for peptide hormones how does it eventually cause changes in cytoplasmic function/ gene transcription, I understand that the hormone attaches to receptor on membrane which amplifies it but then I'm sorta confused after here

Signal molecules inside the cell are activated when the peptide hormone finds its receptor and in turn, activate proteins causing the result.
2013-15: BBiomed (Biochemistry and Molecular Biology), UniMelb
2016-20: MD, UniMelb
2019-20: MPH, UniMelb
2021-: GDipBiostat, USyd

MM1

  • Victorian
  • Forum Obsessive
  • ***
  • Posts: 213
  • Respect: 0
Re: VCE Biology Question Thread
« Reply #952 on: March 01, 2014, 10:28:08 pm »
0
Why does Acetyl-CoA gain and then loose the CoA before entering into the Krebs Cycle?

vox nihili

  • National Moderator
  • Great Wonder of ATAR Notes
  • *****
  • Posts: 5343
  • Respect: +1447
Re: VCE Biology Question Thread
« Reply #953 on: March 01, 2014, 11:03:15 pm »
+1
Why does Acetyl-CoA gain and then loose the CoA before entering into the Krebs Cycle?

CoA helps to facilitate forthcoming reactions in the Krebs cycle.
2013-15: BBiomed (Biochemistry and Molecular Biology), UniMelb
2016-20: MD, UniMelb
2019-20: MPH, UniMelb
2021-: GDipBiostat, USyd

MM1

  • Victorian
  • Forum Obsessive
  • ***
  • Posts: 213
  • Respect: 0
Re: VCE Biology Question Thread
« Reply #954 on: March 02, 2014, 12:38:36 am »
0
CoA helps to facilitate forthcoming reactions in the Krebs cycle.

Thanks! Also, it is required to learn about the intricacies of the cycle? Or literally just the inputs/outputs?

vox nihili

  • National Moderator
  • Great Wonder of ATAR Notes
  • *****
  • Posts: 5343
  • Respect: +1447
Re: VCE Biology Question Thread
« Reply #955 on: March 02, 2014, 12:42:17 am »
+1
Thanks! Also, it is required to learn about the intricacies of the cycle? Or literally just the inputs/outputs?

Inputs and outputs
Where things happen
Things that may affect the overall process

The intricacies aren't covered until second year biochem at uni :)
2013-15: BBiomed (Biochemistry and Molecular Biology), UniMelb
2016-20: MD, UniMelb
2019-20: MPH, UniMelb
2021-: GDipBiostat, USyd

grannysmith

  • Victorian
  • Part of the furniture
  • *****
  • Posts: 1303
  • Crisp and juicy.
  • Respect: +66
Re: VCE Biology Question Thread
« Reply #956 on: March 02, 2014, 08:13:03 am »
0
Inputs and outputs
Where things happen
Things that may affect the overall process

The intricacies aren't covered until second year biochem at uni :)
Which inputs and outputs specifically?

vox nihili

  • National Moderator
  • Great Wonder of ATAR Notes
  • *****
  • Posts: 5343
  • Respect: +1447
Re: VCE Biology Question Thread
« Reply #957 on: March 02, 2014, 11:16:58 am »
0
Which inputs and outputs specifically?

Everything apart from the various intermediates in glycolysis and the krebs cycle.
2013-15: BBiomed (Biochemistry and Molecular Biology), UniMelb
2016-20: MD, UniMelb
2019-20: MPH, UniMelb
2021-: GDipBiostat, USyd

Chang Feng

  • Victorian
  • Forum Obsessive
  • ***
  • Posts: 218
  • Respect: 0
Re: VCE Biology Question Thread
« Reply #958 on: March 02, 2014, 06:40:02 pm »
0
Just wondering how would you define the words hypertonic, hypertonic and isotonic?? I know what they mean just not sure how to define them. Thanks

vox nihili

  • National Moderator
  • Great Wonder of ATAR Notes
  • *****
  • Posts: 5343
  • Respect: +1447
Re: VCE Biology Question Thread
« Reply #959 on: March 02, 2014, 07:58:01 pm »
+1
Just wondering how would you define the words hypertonic, hypertonic and isotonic?? I know what they mean just not sure how to define them. Thanks

Hypertonic describes a solution in which the solutes are more highly concentrated than the solution with which you compare it.
Isotonic describes two solutions with equal concentration of solutes.
Hypotonic describes a solution in which the solutes are less concentrated than the solution with which you compare it.
2013-15: BBiomed (Biochemistry and Molecular Biology), UniMelb
2016-20: MD, UniMelb
2019-20: MPH, UniMelb
2021-: GDipBiostat, USyd