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Enzymes (Roles of enzymes (digestion, metabolism, homeastasis,…
Enzymes
Roles of enzymes
digestion
metabolism
homeastasis
reproduction
movement
Factors affecting enzyme action
temperature
substrate concentration
enzyme concentration
pH
optimum pH
catalase= 7
amylase= 7
peptase= 2
extreme changes to pH
denaturation
small changes to optimum
reduced activity
Characteristics
protein
3 D
folded
globular
Properties
pH sensitive
temperature sensitive
denatured at high temperature
breakage of bonds that hold enzyme in its 3D shape
bonds easily disrupted at higher temperature by excessive molecular motion
hydrogen bonds especially sensitive to temperature changes
highly specific
catalyse only certain chemical reactions
Definition of enzyme action
lowering activation energy of reactions they catalyse
activation energy required to initiate a chemical reaction in which 2 substances react
Definition
biological catalyst
break down substrates
build up substances
Definition; catalysts speed/slow reactions by lowering activation energy but not used up or changed