Enzymes 1 Question Preview (ID: 52384)


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Enzymes are a type of
a) carbohydrate
b) protein
c) lipid
d) cholesterol

The region of an enzyme where the substrate binds is known as the
a) binding site
b) adhesion site
c) active site
d) allosteric site

In order for a reaction to occur, the _____________________________________ of the reaction must be achieved.
a) activation energy
b) collision theory
c) kinetic energy
d) heat

The limiting factor of an investigation into the effects of increasing enzyme concentration on the rate of reaction is
a) enzyme concentration
b) substrate concentration
c) temperature
d) pH

What happens when the temperature increases above the optimum temperature in an enzyme catalysed reaction?
a) constant rate of formation of enzyme-substrate complexes
b) enzyme becomes more reactive
c) active site of the substrate is partially denatured
d) kinetic energy of the enzyme and substrate increases further

When the pH is too low, there is an increase in _____________ which causes the active site to be altered.
a) hydrogen ions
b) hydrogen atoms
c) hydroxide ions
d) hydrolytic atoms

The Lock and Key model follows the idea that the shape of the active site and the substrate are the same.
a) True
b) False
c)
d)

The substrate and enzyme have to effectively collide in order for a reaction to begin.
a) True
b) False
c)
d)

What does not contribute to the specificity of an enzyme?
a) its temperature
b) its active site composition
c) its charge
d) its inhibitor

An enzyme will _________________ the activation energy of a reaction
a) decrease
b) increase
c) maintain
d) fluctuate

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