Enzymes
Presentation
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Biology
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University
•
Easy
Thiaga Letchumi
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37 Slides • 9 Questions
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Chapter 3 Enzymes
By Thiaga Letchumi
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Enzymes are Biological Catalysts. They increase the rate of metabolic reactions.
Almost all biological reactions involve Enzymes.
Enzymes are globular proteins with a specific tertiary shape. They are usually specific to only one reaction.
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Multiple Choice
How does enzyme speed up a chemical reaction?
By lowering the activation energy, the amount of energy needed for reaction to begin
By increasing the activation energy
By increasing the temperature of the reaction
By increasing the amount of reactant available
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Fill in the Blanks
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Multiple Select
Cofactors may be which of the following
Cations (positively charged metal ions, Activators)
Organic molecules, Vitamins or vitamin products (Coenzymes)
Prosthetic group that permanently binds to enzyme
Enzyme inhibitors
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Multiple Choice
Holoenzyme + Apoenzyme = Coenzyme (Cofactors)
True
False
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Multiple Choice
The active site will undergo a conformational change when exposed to a substrate to improve binding.
Lock and key mechanism
Induced fit hypothesis
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Multiple Choice
The enzyme active site is extremely sensitive to changes in pH and temperature.
true
false
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Multiple Choice
Increasing enzyme concentration will increase rate of reaction as more reaction sites are available for the substrate.
False
True
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Multiple Choice
Increasing substrate concentration will increase the rate reaction even when the enzyme active site is saturated.
False
True
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Multiple Choice
Enzyme inhibitors block or distort the enzyme active site.
True
False
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Myasthenia gravis
Neostigmine is a drug that used to treat the symptoms , by improving muscle strength. Its a competitive inhibitor of acetyl choline esterase
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Uses of Enzymes
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Chapter 3 Enzymes
By Thiaga Letchumi
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