Enzyme Active Site and Substrate Interaction Quiz

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What is the role of enzymes in catalyzing biochemical reactions?

Increase the activation energy

Remain unchanged during the reaction (correct)

Prevent the formation of products

Change their conformation permanently

What determines the specificity of an enzyme in binding with its substrate?

Number of substrates available

Activation energy

Physical size of the enzyme

Conformation of the active site (correct)

How do enzymes affect the speed of biochemical reactions they catalyze?

Change the enzymes' properties

Increase activation energy

Decrease activation energy (correct)

Stop the reactions from occurring

What is the main characteristic of an enzyme's active site that allows it to bind with specific substrates?

Complementary shape to the substrate Signup and view all the answers

What is the main function of enzymes in the digestive process?

Breaking down large nutrient molecules into smaller molecules Signup and view all the answers

According to enzyme nomenclature, what does the suffix -lytic indicate?

The enzyme breaks down the corresponding substrate Signup and view all the answers

What is the significance of the 'lock and key' model in enzyme activity?

Only specific substrates can bind to an enzyme due to their unique shapes Signup and view all the answers

In the context of enzymes, what is activation energy related to?

Initiating a specific chemical reaction Signup and view all the answers

What is the main difference between competitive and noncompetitive inhibitors?

Competitive inhibitors bind at the active site, while noncompetitive inhibitors bind at another site on the enzyme Signup and view all the answers

How do irreversible inhibitors affect enzyme activity?

They prevent formation of the enzyme-substrate complex Signup and view all the answers

Why do competitive inhibitors decrease the reaction rate of enzymes?

By competing with the substrate for the active site Signup and view all the answers

What is the role of activators in enzyme activity?

To bind at an allosteric site and enhance catalysis Signup and view all the answers

How do noncompetitive inhibitors differ from competitive inhibitors in terms of binding location?

Noncompetitive inhibitors bind at a different region on the enzyme, while competitive inhibitors bind at the active site Signup and view all the answers

What effect does irreversible inhibition have on the availability of active enzymes?

It decreases availability by blocking active sites permanently Signup and view all the answers

Enzyme Active Site and Substrate Interaction Quiz

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