16 Questions
What is the compound on which an enzyme acts called?
Substrate
What is a holoenzyme composed of?
Apoenzyme together with its cofactors
Where does the catalysis occur in an enzyme?
Active site
What is the term used for the energy barrier that substrates need to overcome before a reaction will occur?
Activation energy
How do enzymes affect the activation energy required for a reaction?
Decrease it
What happens to the energy barrier required for a reaction when enzymes are present?
It decreases
Which type of enzymatic action involves breaking a single structure into smaller components or joining two or more substrate molecules together?
Mechanism of action
What are small organic molecules that act as cofactors for enzymes called?
Coenzymes
Which family of enzymes assists in the breakdown of carbohydrates?
Amylases
What type of specificity describes an enzyme that acts on molecules with specific functional groups such as amino, phosphate, and methyl groups?
Group specificity
Which model explains the enzyme-substrate interaction where the enzyme changes its shape for substrate binding?
Induced-fit model
What term is used to describe enzymes that contain tightly bound metal ions?
Metalloenzymes
Which type of enzymatic specificity describes an enzyme that acts on a particular steric or optical isomer?
Stereochemical specificity
What are tightly bound cofactors called when they perform functions similar to those of prosthetic groups?
Prosthetic groups
Enzymes that require metal ions as loosely bound cofactors are termed as?
Metal-activated enzymes
What are examples of metal ions that can serve as cofactors for enzymes?
Mg and Zn
Learn about enzymes, their role as biocatalysts, the concept of substrate, and the composition of a holoenzyme in this biochemistry lecture.
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