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Metal Activated Enzymes: Iron Enzyme Quiz

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Metal Activated Enzymes: Iron Enzyme Quiz

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Questions and Answers

What is the primary function of the enzyme catalase?

To facilitate the transfer of electrons between different substrates

To catalyze the conversion of water into hydrogen peroxide and oxygen

To synthesize hydrogen peroxide

To catalyze the decomposition of hydrogen peroxide into oxygen and water (correct)

According to its systematic name, what role does hydrogen peroxide primarily play in the catalase reaction?

Hydrogen peroxide acts as an inhibitor

Hydrogen peroxide acts as an electron donor (correct)

Hydrogen peroxide acts exclusively as an electron acceptor

Hydrogen peroxide acts as a catalyst

What type of enzyme is catalase?

A hydrolase

An oxidoreductase (correct)

A ligase

An isomerase

What is the prosthetic group in the heme enzyme catalase?

<p>Haematin or related compounds (C)</p> Signup and view all the answers

In the catalase reaction, how is the second molecule of hydrogen peroxide used?

<p>It receives the oxygen released by the first molecule of hydrogen peroxide. (D)</p> Signup and view all the answers

Flashcards

What is Catalase?

Catalase is an enzyme that breaks down hydrogen peroxide into oxygen and water.

What is hydrogen peroxide?

Hydrogen peroxide (H2O2) is a toxic substance produced in cells during normal metabolism.

How does Catalase protect cells?

Catalase speeds up the breakdown of hydrogen peroxide, preventing it from accumulating to harmful levels.

What type of enzyme is Catalase?

Catalase is classified as an oxidoreductase, meaning it performs redox reactions by transferring electrons.

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What is the active site of Catalase?

Catalase contains a heme group, a molecule with an iron atom at its center.

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Study Notes

Metal Activated Enzymes: Iron Enzyme

Catalase is a heme enzyme
It is an enzyme that catalyzes the decomposition of hydrogen peroxide (H₂O₂) into oxygen (O₂) and water (H₂O)
This prevents the accumulation of harmful hydrogen peroxide
Catalase has a systematic name: hydrogen peroxide (donor) oxidoreductase
The reaction is a disproportionation
The reaction involves the release of oxygen (O₂)
Haematin or related compounds are the prosthetic groups for catalase, and they help the enzyme process the chemical reaction.
This enzyme is strong, so it breaks down hydrogen peroxide into oxygen and water to prevent harmful accumulation.
The iron element is an essential component for the enzyme's function, acting as a catalyst to speed up bodily processes
The iron helps to facilitate the decomposition of hydrogen peroxide in metabolic reactions.

Function

The enzyme systematically brings about the disproportionation
The enzyme facilitates the reaction by using hydrogen peroxide as a source of oxygen.

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Description

Test your knowledge on metal activated enzymes, particularly focusing on catalase. This quiz covers its structure, function, and importance in decomposing hydrogen peroxide. Explore how iron plays a crucial role in catalase activity and the biochemical processes involved.