ch4 Flashcards
metabolism
__ + ___
catabolism, anabolism
catabolism
__ reactions
with ___ of energy
from __ molecule to ___ molecule
breaking-down
release
complex, simple
anabolism
___ reactions
____ energy
from ___ to ___ molecule
building-up
requires
simple to complex
role of enzyme in metabolism
enzymes help __
enzymes are present which function as ___
lower activation energy
biological catalysts
On each enzyme molecule, there is an ____
active site
5 properties of enzymes
- biological catalysts
- actions of enzymes are specific
- proteins
- reusable
- needed in relatively small amounts
enzymes are biological catalysts
+ details?
speeds up metabolic reactions by lowering the activation energy
actions of enzymes are specific
enzyme has unique active site > can catalyse one type of reaction only > specific in action
enzymes are proteins
therefore…
easily affected by temperature and pH
enzymes are reusable
remains unchanged after reactions
Enzymes are needed in relatively small amounts
because…?
they are reusable
3 factors that affect the rate of enzymatic reactions
temperature, pH, inhibitors
temperature
at low, enzymes are ___
when it rises ___
when it reaches a maximum enzymatic reaction, aka
high temperature may cause ___ or even to be ___
the result the rate of enzymatic reaction ___
inactive
enzyme and substrate have more kinetic energy, and increases the enzymatic reaction
optimum temperature
conformational change
denatured
decreases
pH
they work best at their ___
extreme pH may cause ____ ie ___
therefore the rate of enzymatic reaction ___
optimum pH
conformational change
denaturation
decreases
inhibitors
they are ____ that decrease the rate of enzymatic reaction
eg ___ and ___
chemicals
cyanide, heavy metals
