Cellular Respiration Other Metabolites & Control of Respiration. Cellular respiration. polysaccharides glucose. other 6C sugars glucose. hydrolysis. modified. Beyond glucose: Other carbohydrates. Glycolysis accepts a wide range of carbohydrates fuels.
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Cellular Respiration Other Metabolites & Control of Respiration
other 6C sugars glucose
modifiedBeyond glucose: Other carbohydrates
proteins amino acids
||Beyond glucose: Proteins
2C sugar =
carbon skeleton =
enters glycolysis or Krebs cycleat different stages
amino group =
waste product excreted as ammonia, urea, or uric acid
fats glycerol + fatty acids
glycerol (3C) G3P glycolysis
fatty acids 2C acetyl acetyl Krebs
2C fatty acids
as acetyl CoABeyond glucose: Fats
carbohydrateCarbohydrates vs. Fats
That’s whyit takes so muchto lose a pound a fat!
Cells areversatile & selfish!
acetyl CoA fatty acidsMetabolism
Cells areversatile & thrifty!
The many stops on the Carbohydrate Line
from Krebs cycle back through glycolysis
The many stops on the Lipid Line
from Krebs cycle (acetyl CoA) to a variety of lipid synthesis pathways
The many stops on the Amino Acid Line
from Krebs cycle & glycolysis to an array of amino acid synthesis pathways
8 essential amino acids12 synthesized aa’s
The many stops on the GATC Line
• sugar from glycolysis
• phosphate & N-base from Krebs cycle
A B C D E F G
allosteric inhibitor of enzyme 1
“can’t turn back” step before splitting glucose
Why is this regulation important?
Balancing act: availability of raw materials vs. energy demands vs. synthesis
Compartmentalization allows for increased cellular efficiency.
Some prokaryotes are able to carry out aerobic cellular respiration, and photosynthesis. They have adapted their cell membrane into quasi-compartments.