18 Questions
What is the primary function of peroxisomes in a cell?
To rid the cell of toxic peroxides
What is the structure of the peroxisome membrane?
Single lipid bilayer
Where do peroxisomes bud from?
Endoplasmic reticulum
What type of fatty acid oxidation occurs in peroxisomes?
Beta-oxidation
How do peroxisomes replicate?
By enlarging and then dividing
What is the number of genes involved in the synthesis of peroxisomes?
12 genes
What is the function of catalase in the peroxisome?
To convert hydrogen peroxide into water
In which cells does beta-oxidation occur exclusively in the peroxisome?
Yeast and plant cells
What is the product of the oxidative reaction in the peroxisome?
Hydrogen peroxide
What is the function of the peroxisome in liver and kidney cells?
To detoxify various toxic substances
What is the name of the reaction in which hydrogen peroxide is converted into water?
Perooxidation reaction
What is the name of the most abundant phospholipid in myelin, which is formed in the peroxisome?
Plasmalogen
What is the mechanism of protein import into peroxisomes?
A peroxisome targeting signal binds to a soluble receptor protein in the cytosol
What is the result of the failure to metabolize fatty acids properly in X-ALD?
Deterioration of the myelin sheaths of neurons
What is the function of glyoxysomes in plants?
To break down fatty acids
What is a common feature of all peroxisome disorders?
Mutant versions of enzymes found within peroxisomes
What is the location of the receptor protein that binds to the peroxisome targeting signal?
Peroxisome membrane
What is the function of peroxisomes in the synthesis of myelin?
To participate in the synthesis of lipids
Test your knowledge of peroxisomes, organelles found in eukaryotes that participate in fatty acid metabolism and rid the cell of toxic peroxides. Learn about their structure, including the single lipid bilayer membrane and membrane proteins, and their functions.
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