Login

Welcome, Guest. Please login or register.

July 25, 2025, 01:01:56 pm

Author Topic: Biology Unit 3 Questions Megathread  (Read 117542 times)  Share 

0 Members and 1 Guest are viewing this topic.

WhoTookMyUsername

  • Guest
Re: Biology Questions Megathread
« Reply #135 on: February 19, 2011, 08:13:25 pm »
0
lol should have made this clearer

*those were examples i thought of from different perspectives, any refinement possible ?

lexitu

  • Victorian
  • ATAR Notes Superstar
  • ******
  • Posts: 2147
  • When I grow up I'm going to Bovine University.
  • Respect: +66
Re: Biology Questions Megathread
« Reply #136 on: February 19, 2011, 08:20:13 pm »
0
Oh okay :)

In that case I would rid with the term 'precursor' (bio uni people please confirm that it's not ideal here) but keep something similar to that definition.

WhoTookMyUsername

  • Guest
Re: Biology Questions Megathread
« Reply #137 on: February 19, 2011, 08:22:39 pm »
0
Get up to 1000 posts :D

I looked up synonyms for precursor.

I don't think herald fits well ! :)
But yeah, i think there should be a better word (not sure what it is)

lexitu

  • Victorian
  • ATAR Notes Superstar
  • ******
  • Posts: 2147
  • When I grow up I'm going to Bovine University.
  • Respect: +66
Re: Biology Questions Megathread
« Reply #138 on: February 19, 2011, 08:27:55 pm »
0
I think it's not the correct term in that glucose doesn't in any way become ATP (again, I'm not 100% sure on this). You could just say it is used to resynthesise ATP.

WhoTookMyUsername

  • Guest
Re: Biology Questions Megathread
« Reply #139 on: February 19, 2011, 08:36:46 pm »
0
m... probably
The - add descriptive word descriping neccesity / order(fundamental?) source of energy to synthesise ATP?

lexitu

  • Victorian
  • ATAR Notes Superstar
  • ******
  • Posts: 2147
  • When I grow up I'm going to Bovine University.
  • Respect: +66
Re: Biology Questions Megathread
« Reply #140 on: February 19, 2011, 08:44:34 pm »
0
Umm yeah something like that. I think synthesise gives the wrong impression though...

TrueLight

  • Victorian
  • ATAR Notes Superstar
  • ******
  • Posts: 2759
  • Respect: +9
Re: Biology Questions Megathread
« Reply #141 on: February 20, 2011, 12:18:41 am »
0
Pretty sure it can be used for either, but usually tertiary as most proteins don't have a quaternary structure.

i reckon most proteins form a quaternary structure because you get proteins forming complexes with other proteins in most of the cases i can think of

look here for eg
http://vce.atarnotes.com/forum/index.php/topic,26528.msg268958.html
« Last Edit: February 20, 2011, 01:14:03 am by TrueLight »
http://www.campaignforliberty.com

Completed Bachelor of Science. Majored in Immunology and Microbiology.

“Who controls the past, controls the future. Who controls the present, controls the past.”
George Orwell, 1984.

"Terrorism is the best political weapon for nothing drives people harder than a fear of sudden death."
Adolf Hitler

“The bigger the lie, the more inclined people will be to believe it”
Adolf Hitler

"Beware the leader who bangs the drums of war in order to whip the citizenry into a patriotic fervor, for patriotism is indeed a double-edged sword. It both emboldens the blood, just

WhoTookMyUsername

  • Guest
Re: Biology Questions Megathread
« Reply #142 on: February 20, 2011, 09:31:27 am »
0
m... yeah i doubt they'll end up asking that, do you have a defintion for the role of Glucose as a source of energy?

(simply saying, glucose is a asource of energy, is not really great because starch, glycogen, fat are all sources of energy

the 'predominant' (precursor?) to ATP?

Russ

  • Honorary Moderator
  • Great Wonder of ATAR Notes
  • *******
  • Posts: 8442
  • Respect: +661
Re: Biology Questions Megathread
« Reply #143 on: February 20, 2011, 09:53:04 am »
0
Just call it a requirement for cellular respiration to occur

HERculina

  • Victorian
  • Part of the furniture
  • *****
  • Posts: 1209
  • To ∞ and beyond
  • Respect: +11
  • School: St. Trinians
  • School Grad Year: 2012
Re: Biology Questions Megathread
« Reply #144 on: February 22, 2011, 09:29:24 pm »
0
Is glycogen water-soluble because it has more alpha -1,6 glycosidic links?
------------------------------------------------------> :D <-----------------------------------------------------

Russ

  • Honorary Moderator
  • Great Wonder of ATAR Notes
  • *******
  • Posts: 8442
  • Respect: +661
Re: Biology Questions Megathread
« Reply #145 on: February 23, 2011, 09:23:11 am »
0
More links than what?

I'm trying to think of how that would affect solubility and can't think of anything. It's the OH groups that determine it.

HERculina

  • Victorian
  • Part of the furniture
  • *****
  • Posts: 1209
  • To ∞ and beyond
  • Respect: +11
  • School: St. Trinians
  • School Grad Year: 2012
Re: Biology Questions Megathread
« Reply #146 on: February 23, 2011, 10:24:36 am »
0
hm im confused  :buck2:
 it says in my workbook that glycogen is more highly branched and water-soluble than starch cause it has more alpha-1,6 glycosidic links than alpha -1,4 ones.
------------------------------------------------------> :D <-----------------------------------------------------

pi

  • Honorary Moderator
  • Great Wonder of ATAR Notes
  • *******
  • Posts: 14348
  • Doctor.
  • Respect: +2376
Re: Biology Questions Megathread
« Reply #147 on: February 23, 2011, 04:06:59 pm »
0
hm im confused  :buck2:
 it says in my workbook that glycogen is more highly branched and water-soluble than starch cause it has more alpha-1,6 glycosidic links than alpha -1,4 ones.

Glycogen is more soluble than starch (even though they both have 1,6 glycosidic links and alpha -1,4 ones) because starch exists in general as an alpha helix while glycogen is a more highly branched and random structure. In the alpha-helical conformation there are less exposed -OH (hydroxide) groups to the solution making the starch less hydrophilic than the glycogen. As there are less OH groups available to from hydrogen bonds with the polar water molecules, that is why starch is less soluble.

It is due to this 'extra' branching that glycogen has that enables it to be more soluble.

Hope that helps. :)


(this specific stuff will never come up in the exam btw)
« Last Edit: February 23, 2011, 04:09:05 pm by Rohitpi »

ggxoxo

  • Victorian
  • Forum Obsessive
  • ***
  • Posts: 480
  • Respect: +5
  • School Grad Year: 2012
Re: Biology Questions Megathread
« Reply #148 on: February 23, 2011, 06:17:34 pm »
0
People I need help please!!! ASAP!!! My class is doing a SAC on osmosis right now and we are testing potato cylinders. Now we are putting the potato cylinders in different sucrose concentrations. Our control is potato cylinder in distlled water. However apparently it is not a 'true' or 'valid' control. why is that? Please reply ASAP!

WhoTookMyUsername

  • Guest
Re: Biology Questions Megathread
« Reply #149 on: February 23, 2011, 06:44:30 pm »
0
Because it is not truly isotonic