Login

Join for Free!
118883 members


Please help!

Discussion of all aspects of cellular structure, physiology and communication.

Moderator: BioTeam

Please help!

Postby Cloudrose » Thu Jan 19, 2012 2:29 am

Where in the cell does glycolysis occur?
In the presence of ample O2's what happens to pyruvate?
Where in the cell is pyruvate broken down?
じゃっまた!主は私の光、また救いです。 だれを恐れる必要がありましょう。Psalms 27:1 
~From a christian cat loving girl in a Bio class >^.^<
Cloudrose
Garter
Garter
 
Posts: 1
Joined: Thu Jan 19, 2012 2:03 am

Postby canalon » Thu Jan 19, 2012 2:35 am

I suggest you open your text book and look at the glycolysis chapter. There will be answers and maybe even light,
Patrick

Science has proof without any certainty. Creationists have certainty without
any proof. (Ashley Montague)
User avatar
canalon
Inland Taipan
Inland Taipan
 
Posts: 3909
Joined: Thu Feb 03, 2005 2:46 pm
Location: Canada

Re: Please help!

Postby billyfisher100 » Fri Jan 20, 2012 7:19 am

1) In the cytosol (the bit of the cytoplasm with no organelles).

2) Pyruvate will enter the tricarboxylic acid cycle, be catabolised by pyruvate dehydrogenase into either Acetyl Coenzyme A or Ox.-Aloacetate. Then, the reduced nicotinamide adenine dinucleotide (NADH) and Succinate (C4O4) will enter an electron transport chain in oxidative phosphorylation to be oxidised, which is the most efficient way of releasing energy, unlike the glycolysis fermentation process.

3) In the matrix of the mitochondrion.

Hope this is better than looking in a textbook!
billyfisher100
Garter
Garter
 
Posts: 33
Joined: Wed Jan 18, 2012 10:18 pm


Re: Please help!

Postby billyfisher100 » Fri Jan 20, 2012 7:21 am

If you don't mind me asking, just out of interest, is this A Level Biology you're doing or is it part of a degree?
billyfisher100
Garter
Garter
 
Posts: 33
Joined: Wed Jan 18, 2012 10:18 pm

Postby JackBean » Fri Jan 20, 2012 8:14 am

billyfisher100:
1) what's Ox.-Aloacetate?
2) are you sure succinate is C4O4?
3) succinate enters ETC?
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.
User avatar
JackBean
Inland Taipan
Inland Taipan
 
Posts: 5690
Joined: Mon Sep 14, 2009 7:12 pm

Postby billyfisher100 » Sat Jan 21, 2012 1:13 pm

1) Oxaloacetate is a compound (C4O5) in the tricarboxylic acid cycle, it is an isomer of Malate, after the action of Malate Dehydrogenase or Pyruvate Carboxylase, and is a compund which has been formed (sometimes oxaloacetate, sometimes acetyl, depending on the end compound that will be produced) after catabolism of pyruvate.
2) Yes, it is only the carboxyl group, C4O4 succinic acid has 6 hydrogen atoms.
3) Yes, oxidative phosphorylation, after a coupled reaction with Coenzyme Q to QH2 with the enzyme succinate dehydrogenase.
billyfisher100
Garter
Garter
 
Posts: 33
Joined: Wed Jan 18, 2012 10:18 pm

Postby JackBean » Sat Jan 21, 2012 3:18 pm

1) it's difference between Ox.-Aloacetate and oxaloacetate
2) no, succinate is not C4O4, you're forgetting hydrogens :roll:
3) succinate doesn't enter the ETC. It just passes electrons to coenzyme Q, but otherwise is involved in TCA cycle, not in ETC
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.
User avatar
JackBean
Inland Taipan
Inland Taipan
 
Posts: 5690
Joined: Mon Sep 14, 2009 7:12 pm

Postby billyfisher100 » Mon Jan 23, 2012 4:53 pm

1. Sorry, I intended to type Oxaloacetate, not "Ox.-Aloacetate".
2. Sorry, I mistyped that, obviously succinic acid is C4H6O4.
3. Yes, succinate does pass electrons to Coenzyme Q (Q to QH2) but I thought you were referring to it entering "a stage" of oxidative phosphorylation, not primarily the electron transport chain.
billyfisher100
Garter
Garter
 
Posts: 33
Joined: Wed Jan 18, 2012 10:18 pm

Postby cbarlage » Thu Jan 26, 2012 6:00 pm

http://www.youtube.com/watch?v=p97BfO1c ... ature=plcp
Interesting way to explain cellular respiration
this will probably help you out
cbarlage
Garter
Garter
 
Posts: 2
Joined: Tue Dec 20, 2011 5:50 pm

Postby JackBean » Thu Jan 26, 2012 7:04 pm

not so sure about that
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.
User avatar
JackBean
Inland Taipan
Inland Taipan
 
Posts: 5690
Joined: Mon Sep 14, 2009 7:12 pm

Re: Please help!

Postby billyfisher100 » Mon Jan 30, 2012 9:43 pm

Neither am I, I agree with JackBean on that one...
billyfisher100
Garter
Garter
 
Posts: 33
Joined: Wed Jan 18, 2012 10:18 pm


Return to Cell Biology

Who is online

Users browsing this forum: No registered users and 2 guests