HL Enzymes & Energy Carriers Flashcards
Ch 10
What is the active site?
the part of an enzyme that combines with the substrate
The substrate causes the active site to change shape slightly when they come in contact, the active site then?
fits more precisely around the substrate
The process of enzyme combining with substrates is called what? (2 names)
active site theory,
induced fit model
Name the 3 parts of the induced fit model.
1) enzyme, substrate
2) enzyme-substrate complex
3) enzyme, substrate altered
What happens the active site during enzyme-substrate complex?
changes shape
What happens the active site/enzyme during enzyme-substrate altered?
shape returns to normal
Enzyme specificity means?
each enzyme will react only with one particular substrate
Describe in detail the active site theory of enzyme action
Complementary shape to substrate / active site changes shape or induced fit /
to accommodate substrate /
enzyme substrate complex is formed /
product formed /
enzyme unchanged or active site changes back to original shape or enzyme can be reused
The active site is the part of the enzyme responsible for?
specificity
Give the optimum temperatures for enzymes in humans and plants.
human - 37
plant - 25
(degrees celsius)
An enzyme’s optimum pH means?
the pH value at which the enzyme works best
Definition of a denatured enzyme?
has lost it’s shape and can no longer function
Name 2 causes of denaturation.
high temperatures,
pH values outside the optimum
ATP stands for?
adenosine triphosphate
ATP does what three things with energy?
transfers
carries
releases
The process of adding a phosphate group is called?
phosphorylation
Phosphorylation means?
The process of adding a phosphate group is called?
4 advantages of ATP as energy?
1) releases energy in suitable quantities
2) energy available for immediate use
3) energy easily released
4) easily recycled
NADP stands for?
nicotinamide adenine dinucleotide phosphate
NADPH stands for?
Nicotinamide Adenine Dinucleotide Phosphate Hydrogen
