phase diagram

[asdfray]

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understandably H2O and CO2 are the two important phase diagrams we need to know (obv. what makes them unique and such). However, do we need to memorize the values for the critical point, triple point, etc. for both of these diagrams? I remember I had to do it in class, and it was somewhat emphasized.

Here's another question:
Strictly looking the definition of cellular respiration, does it include 3 stages: glycolysis, TCA, and oxidative phosphorylation or pyruvate decarboxylation, TCA, oxidative phosphorylation?

Since glycolysis is the preliminary step of breaking down of glucose to pyruvate and from there it can under go aerobic respiration or anaerobic respiration, should it be included in the definition of cellular respiration?

Also, is pyruvate decarboxylation part of TCA?

Thanks
Ray

 

[Saiph]

I haven't seen anything about the water diagram in any practice questions. I think you just need to know where the triple point is and end point is on the graph and what they signify.

Glycolysis is part of cellular respiration because without the pyruvate it won't work. Pyruvate decarboxylation happens before the Krebs cycle so I would say no.

I had to google what TCA was, I only used the terms Citric Acid Cycle or Krebs haha.

Good luck!

 

[asdfray]

thanks for responding,

Yeah i assume they put in glycolysis because carbs are burned first in the body followed by fat and protein. However, doesn't the definition of cellular respiration consider the breakdown of fat and protein as well?

From my understanding triglyceride are broken down to the 3 fatty acid and 1 glycerol backbone. The glycerol backbone enter glycolysis and converts into PGAL; but Fatty acid undergoes beta-oxidation and gets converted into acetyl COA(skips glycolysis entirely and enter he Kreb cycle (fine, i'll use this ) So from this, I questioned if glycolysis is actually in the Cellular repiration definition. Maybe I'm thinking too much into this. SORRY

further input is appreciated =D