Enzymes: The Catalysts of Life - Understanding Their Role in Biochemical Reactions Online Test

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Enzymes: The Catalysts of Life - Understanding Their Role in Biochemical Reactions

Description: Enzymes: The Catalysts of Life - Understanding Their Role in Biochemical Reactions
Number of Questions: 15
Created by: Aliensbrain Bot
Tags: enzymes biochemical reactions catalysis active site substrate

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What are enzymes?

Proteins that speed up chemical reactions
Carbohydrates that provide energy for cells
Lipids that form cell membranes
Nucleic acids that store genetic information

What is the role of enzymes in biochemical reactions?

To increase the activation energy of the reaction
To decrease the activation energy of the reaction
To change the products of the reaction
To change the reactants of the reaction

What is the active site of an enzyme?

The region of the enzyme that binds to the substrate
The region of the enzyme that catalyzes the reaction
The region of the enzyme that releases the products
The region of the enzyme that binds to other enzymes

What is the substrate of an enzyme?

The molecule that the enzyme binds to
The molecule that the enzyme catalyzes the reaction of
The molecule that is produced by the enzyme-catalyzed reaction
The molecule that is consumed by the enzyme-catalyzed reaction

What is the product of an enzyme-catalyzed reaction?

The molecule that the enzyme binds to
The molecule that the enzyme catalyzes the reaction of
The molecule that is produced by the enzyme-catalyzed reaction
The molecule that is consumed by the enzyme-catalyzed reaction

What are the factors that affect enzyme activity?

Temperature
pH
Substrate concentration
Enzyme concentration
All of the above

What is the optimal temperature for most enzymes?

0-4 °C
20-25 °C
37 °C
50-60 °C

What is the optimal pH for most enzymes?

1-2
3-4
7-8
9-10

What happens when the temperature or pH of an enzyme is too high or too low?

The enzyme becomes more active
The enzyme becomes less active
The enzyme becomes denatured
The enzyme becomes inactive

What is enzyme inhibition?

The process of increasing enzyme activity
The process of decreasing enzyme activity
The process of changing the substrate of an enzyme
The process of changing the product of an enzyme

What are the two main types of enzyme inhibition?

Competitive inhibition and non-competitive inhibition
Competitive inhibition and uncompetitive inhibition
Competitive inhibition and mixed inhibition
Non-competitive inhibition and uncompetitive inhibition

What is competitive inhibition?

When the inhibitor binds to the active site of the enzyme
When the inhibitor binds to a site on the enzyme other than the active site
When the inhibitor changes the conformation of the enzyme
When the inhibitor changes the substrate of the enzyme

What is non-competitive inhibition?

When the inhibitor binds to the active site of the enzyme
When the inhibitor binds to a site on the enzyme other than the active site
When the inhibitor changes the conformation of the enzyme
When the inhibitor changes the substrate of the enzyme

What are some examples of enzyme inhibitors?

Drugs
Toxins
Heavy metals
All of the above

What is the importance of enzymes in living organisms?

They speed up chemical reactions
They provide energy for cells
They help to build and repair tissues
They help to regulate metabolism
All of the above

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