Talk:Crista

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Untitled

Is this a plural? What is the single form? Crista? -- Zoe

crista is singular, cristae is the plural form.

NADH is reduced into NAD+, H+ ions, and electrons by an enzyme.

Shouldn't it be oxidized? --139.179.92.91 (talk) 21:01, 11 March 2015 (UTC)[reply]

Grammar issue

"The maximum surface for chemical reactions to occur within the mitochondria." This isn't a complete sentence. Cheers, Kevin 70.52.216.160 08:56, 24 October 2007 (UTC)[reply]

my names crista —Preceding unsigned comment added by 72.81.139.167 (talk) 21:44, 30 September 2008 (UTC)[reply]

Total number of ATP being produced out of one glucose molecule

This article states there are 34 ATPs being produced. I believe the writer got this number from the fact that during glycolysis and the Krebs cycle, there are being made: 2 ATP, 6 NADH and 1 FADH₂. Indeed, according to the knowledge tha one NADH can give 2,5 ATP, and one FADH₂can give 1,5 ATP, this equation works. But, in reality, the first 2 NADHs are produced in the cytoplasm. They need to be transferred to the cristae, which costs energy, lowered their yield to 1,5 ATP per NADH. Also, the Krebs cyclus produces one GTP, which is equivalent to 1 ATP.

In total, this way we would acquire: Glycolysis: 2 ATP, 2 NADH (= 3 ATP) Citruc Acid cyclus: 8 NADH (= 20 ATP), 2 FADH₂(= 3 ATP) 2 GTP (= 2 ATP)

Giving a total of 30 ATP, instead of 34 ATP, per glucose molecule.

As I got this from schoolwork, my source is "Biology, 8th edition" by Campbell Reece, Pearson. Although I find it important for someone to confirm this finding first.

Redtails (talk) 11:27, 15 June 2009 (UTC)[reply]

citations?

Can we get some? —Preceding unsigned comment added by Wackojacko1138 (talk • contribs) 23:03, 8 May 2009 (UTC)[reply]

Well some people seem to want more references, and I offered some -- but Autostrophe didn't seem to like that. What then is the consensus?? (Such optical issues look like they could become important, e.g. see Cifra's review in Prog.Biophys.and Molec.Biol., doi:10.1016 -- tho that I'm not suggesting that as a ref for here, yet.) Tegiap (talk) 11:27, 8 January 2011 (UTC)[reply]

Mention of Praseodymium? The rare-earth element?!

This bit caught my eye as very confusing (in the electron transport chain section):

"Those electrons are finally accepted by oxygen (O₂), which combine with some of the praseodymium ions from the mitochondrial matrix through ATP synthase and the electrons that had traveled through the plasmodesmata."

What does this mean? Praseodymium is an element, with no known biological role. I did find [on Google Books] though:

"In vitro both uptake and release of Ca by mitochondria are blocked by a number of rare-earth elements including lanthanum and praseodymium, but the effects of these substances in vivo have not been examined. It is possible that injection of La or Pr into an axon might be used to "freeze" Ca within the mitochondria"

(P. F. Baker, H. Reuter Calcium Movement in Excitable Cells: Pergamon Studies in The Life Sciences 2013).

But then, this looks like it might just be a self-published e-book, and so might eventually end up in the Great Biochemical Garbage-Can In The Sky. :) Jimw338 (talk) 05:04, 11 January 2015 (UTC)[reply]

That quote seems to imply that Praseodymium *blocks* the normal function of the electron transport chain. I'm going to delete the reference. — Preceding unsigned comment added by 67.164.172.203 (talk) 17:03, 22 May 2015 (UTC)[reply]

Assessment comment

The comment(s) below were originally left at Talk:Crista/Comments, and are posted here for posterity. Following several discussions in past years, these subpages are now deprecated. The comments may be irrelevant or outdated; if so, please feel free to remove this section.

Rated "high" as high school/SAT biology content, part of mitochondrion - tameeria 19:30, 22 February 2007 (UTC)[reply]

Last edited at 19:30, 22 February 2007 (UTC). Substituted at 12:26, 29 April 2016 (UTC)