Biochemistry Lecture 9: Enzymes and Holoenzyme

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What term refers to the compound on which an enzyme acts?

Cofactor

Holoenzyme

Substrate (correct)

Apoenzyme

Where does catalysis occur in an enzyme?

Active site (correct)

Apoenzyme

Holoenzyme

Cofactor

What is the specific region where the substrate binds to an enzyme called?

Active site (correct)

Apoenzyme

Cofactor

Holoenzyme

What is the term for a complete, functional enzyme that is catalytically active and consists of an apoenzyme together with its cofactors?

Holoenzyme Signup and view all the answers

What do enzymes lower in order to speed up reactions?

Activation energy Signup and view all the answers

What is the name for the reactants that need to have a certain energy before they will react?

Substrates Signup and view all the answers

What are cofactors that are small organic molecules called?

Coenzymes Signup and view all the answers

Which family of enzymes assists in the breakdown of carbohydrates?

Amylases Signup and view all the answers

What type of specificity refers to the enzyme acting on a particular type of chemical bond regardless of the rest of the molecular structure?

Linkage specificity Signup and view all the answers

Which model of enzyme binding states that the active site is rigid in shape and does not change at all?

The lock-and-key model Signup and view all the answers

What are examples of metal ions that act as cofactors?

$Co, Cu, and Zn$ Signup and view all the answers

Which type of enzymatic action involves joining two or more substrate molecules together?

Synthesis Signup and view all the answers

What term is used for cofactors that are tightly bound to enzymes?

Prosthetic groups Signup and view all the answers

What is the most common type of cofactor?

$B$ vitamins Signup and view all the answers

Which enzyme works at a very acidic pH of 1.5?

$\alpha$-amylase Signup and view all the answers

What does the induced-fit model state about the enzyme's shape?

The enzyme changes its shape for substrate binding. Signup and view all the answers

What is the compound on which an enzyme acts called?

Substrate Signup and view all the answers

What type of specificity refers to the enzyme acting on a particular type of chemical bond regardless of the rest of the molecular structure?

Group specificity Signup and view all the answers

What model of enzyme binding states that the active site is rigid in shape and does not change at all?

Lock and key model Signup and view all the answers

Which type of enzymatic action involves joining two or more substrate molecules together?

Ligase Signup and view all the answers

What enzyme works at a very acidic pH of 1.5?

Pepsin Signup and view all the answers

What is the term for cofactors that are tightly bound to enzymes?

Prosthetic groups Signup and view all the answers

Which type of specificity refers to the enzyme acting on a particular steric or optical isomer?

Stereochemical specificity Signup and view all the answers

Which model of enzyme binding states that the active site changes its shape to fit the substrate only after the substrate has been bound?

Induced-fit model Signup and view all the answers

What term refers to the compound on which an enzyme acts?

Substrate Signup and view all the answers

What is the specific region where the substrate binds to an enzyme called?

Active site Signup and view all the answers

Which enzyme works at a very acidic pH of 1.5?

Pepsin Signup and view all the answers

What is the term for cofactors that are tightly bound to enzymes?

Prosthetic groups Signup and view all the answers

What do enzymes lower in order to speed up reactions?

Activation energy Signup and view all the answers

What are examples of metal ions that act as cofactors?

Cu and Zn Signup and view all the answers

Which type of enzymatic action involves breaking a single structure into smaller components or joining two or more substrate molecules together?

Ligation Signup and view all the answers

What is the most common type of cofactor?

Metal ions Signup and view all the answers

Biochemistry Lecture 9: Enzymes and Holoenzyme

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Questions and Answers

What term refers to the compound on which an enzyme acts?

Where does catalysis occur in an enzyme?

What is the specific region where the substrate binds to an enzyme called?

What is the term for a complete, functional enzyme that is catalytically active and consists of an apoenzyme together with its cofactors?

What do enzymes lower in order to speed up reactions?

What is the name for the reactants that need to have a certain energy before they will react?

What are cofactors that are small organic molecules called?

Which family of enzymes assists in the breakdown of carbohydrates?

What type of specificity refers to the enzyme acting on a particular type of chemical bond regardless of the rest of the molecular structure?

Which model of enzyme binding states that the active site is rigid in shape and does not change at all?

What are examples of metal ions that act as cofactors?

Which type of enzymatic action involves joining two or more substrate molecules together?

What term is used for cofactors that are tightly bound to enzymes?

What is the most common type of cofactor?

Which enzyme works at a very acidic pH of 1.5?

What does the induced-fit model state about the enzyme's shape?

What is the compound on which an enzyme acts called?

What type of specificity refers to the enzyme acting on a particular type of chemical bond regardless of the rest of the molecular structure?

What model of enzyme binding states that the active site is rigid in shape and does not change at all?

Which type of enzymatic action involves joining two or more substrate molecules together?

What enzyme works at a very acidic pH of 1.5?

What is the term for cofactors that are tightly bound to enzymes?

Which type of specificity refers to the enzyme acting on a particular steric or optical isomer?

Which model of enzyme binding states that the active site changes its shape to fit the substrate only after the substrate has been bound?

What term refers to the compound on which an enzyme acts?

What is the specific region where the substrate binds to an enzyme called?

Which enzyme works at a very acidic pH of 1.5?

What is the term for cofactors that are tightly bound to enzymes?

What do enzymes lower in order to speed up reactions?

What are examples of metal ions that act as cofactors?

Which type of enzymatic action involves breaking a single structure into smaller components or joining two or more substrate molecules together?

What is the most common type of cofactor?

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