Bio 12 notes
Subject Metabolism
#1: Metabolism basics
● Metabolism
○ Sum of all the chemical reactions happening in the body every moment of
the day
● Catabolism
↳ to remember, think cat -> catastrophe
○ Breaks large molecules down into smaller ones
○ Releases energy (exogenic)
● Anabolism
○ Builds larger molecules from smaller ones
○ Requires energy (endergonic)
, ● Both runs at the same time + constantly
#2: Catabolism
● Catabolic reactions
○ Release energy stored in chemical bonds when breaking down large
molecules
↳ digestion (break food down to nutrients)
↳ cellular respiration (break glucose down for usable energy)
● Exergonic
↳ ex -> think energy “exiting”
○ Releases more energy than it uses
↳ energy captured + stored in ATP
● Body runs on catabolism when digesting a meal
#3: Anabolism
● Anabolic reactions
○ Use energy (from ATP) to build larger + complex molecules from smaller ones
↳ building muscle protein after exercise
↳ copying DNA before cell divides
Subject Metabolism
#1: Metabolism basics
● Metabolism
○ Sum of all the chemical reactions happening in the body every moment of
the day
● Catabolism
↳ to remember, think cat -> catastrophe
○ Breaks large molecules down into smaller ones
○ Releases energy (exogenic)
● Anabolism
○ Builds larger molecules from smaller ones
○ Requires energy (endergonic)
, ● Both runs at the same time + constantly
#2: Catabolism
● Catabolic reactions
○ Release energy stored in chemical bonds when breaking down large
molecules
↳ digestion (break food down to nutrients)
↳ cellular respiration (break glucose down for usable energy)
● Exergonic
↳ ex -> think energy “exiting”
○ Releases more energy than it uses
↳ energy captured + stored in ATP
● Body runs on catabolism when digesting a meal
#3: Anabolism
● Anabolic reactions
○ Use energy (from ATP) to build larger + complex molecules from smaller ones
↳ building muscle protein after exercise
↳ copying DNA before cell divides
