18 Questions
What is the main function of enzymes?
To accelerate the rate of reactions by reducing the energy of activation
How are enzymes affected by entering reactions?
They are unchanged
Which type of enzymes act outside the cells?
Extracellular enzymes
How do physical or chemical agents affect enzymes?
Cause denaturation resulting in loss of function
What is the term for the specific tertiary structure of each enzyme?
Tertiary structure
Which type of enzymes are sometimes secreted as proenzymes?
Extracellular enzymes
What is the main reason zymogens are inactive?
Their active sites are masked by a polypeptide chain
How are zymogens activated to become active enzymes?
By removal of the polypeptide chain to open the active site
Which enzyme demonstrates group specificity in its action?
Pepsin
What type of specificity does urease exhibit?
Absolute specificity
Which enzyme example demonstrates optical specificity?
D-amino acid oxidase
What is the key feature of the enzyme's active site?
It is where catalysis takes place
What is the role of enzymes in a biochemical reaction?
Decrease the activation energy of the reaction
How are enzymes named according to the text?
Based on the reactants they act upon
What is the main function of an oxidoreductase enzyme?
Facilitate oxidation-reduction reactions
What type of enzyme catalyzes the transfer of a group other than hydrogen?
Transferase
In enzyme nomenclature, what can the name of an enzyme indicate?
The type of reaction the enzyme catalyzes
What is the function of a hydrolase enzyme?
Catalyze hydrolysis reactions
Learn about enzymes in this lecture by Dr. Ihab Abdel Moneam. Topics include enzyme recognition, properties, specificity, mechanism of action, and classification. Understand how enzymes act as protein catalysts and accelerate reaction rates.
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