Metabolic Pathways Flashcards
Metabolic pathways are
integrated and controlled reactions within a cell
Metabolic pathways are reactions controlled by
presence or absence of enzymes which act as catalysts
In animals, specific metabolic pathways can produce
vitamins and haemoglobin
Metabolic pathways are a series of reactions that
start with a substrate
finish with end product
Anabolic
requires energy
build up large molecules from smaller ones (biosynthesis)
Catabolic
releases energy
break down large molecules into smaller ones (degradation)
example of anabolic reaction
synthesis of glycogen from glucose
example of catabolic reaction
process of food digestion, where different enzymes break down food particles so they can be absorbed by small intestine
Metabolic pathways can be
reversible and irreversible
most are reversible
All metabolic pathways have to be regulated and controlled to…
Stop build up of an end products that isnt needed
Active site has
high affinity to substrate as well as being specific to substrate, this orientates reactants into correct position for reaction to take place
Binding of enzyme to substrate does what?
lowers activation energy of reaction
rate of enzyme reaction can be affected by?
substrate concentration
As substrate concentration increases
enzyme reaction increases until all active sites are occupied by substrates, then all active sites are occupied, enzyme is saturated
When all active sites are occupied, the enzyme is said to be?
Saturated
