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Monday, 30 January 2017

Biomolecules : Metabolic Basis for living organism, Enzymes


Metabolic Basis for living organism : 
  • The metabolic pathways that lead to more complex structure from simpler structure are called biosynthetic or anabolic pathways and those pathways that lead to simpler structure from complex structure are called catabolic pathways. 
  • Photosynthesis and protein synthesis are example of anabolic and respiration and digestion are the example of catabolic pathways.
  • ATP (adenosine triphosphate) is the most important form of energy currency in living world.
  • All living organism exist in steady state characterized by concentration of each of the metabolites. The living state is a non-equilibrium steady state to be able to perform work.
Enzymes :
  • Enzymes are commonly proteinaceous substances which are capable of catalyzing chemical reactions of biological origin without themselves undergoing any change, commonly called as biocatalysts. The nucleic acids that behave like enzymes are called ribozymes. The tertiary structure of protein has pockets or crevice into which substrate fit to catalyze the biochemical reactions. 

  •  The major difference between inorganic and organic.
  • Catalyst is inorganic catalyst works effectively at high temperature and pressure but enzyme get damaged at high temperature.
  • The external energy required to start a chemical reaction is called activation energy.
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