19 Questions
What is the approximate diameter of a peroxisome?
0.5 µm
Where are integral membrane proteins of peroxisomes synthesized?
Endoplasmic reticulum
How do peroxisomes replicate?
By fission
Where are peroxisomal precursor vesicles formed?
Budding part of endoplasmic reticulum
Where are most of the peroxisome matrix and membrane proteins synthesized?
Cytoplasm
How many known peroxisomal proteins, called peroxins, participate in the process of peroxisome assembly?
At least 50
What is the approximate half-life of peroxisomes?
5 days
How are peroxisomes degraded?
By themselves or when fusing with lysosomes
What is the function of peroxisomes?
Contain more than 60 different enzymes
What is the primary function of peroxisomes?
Detoxification
Which enzyme is responsible for the conversion of excessive hydrogen peroxide to water?
Catalase
What process occurs in peroxisomes to convert fatty acids to acetyl CoA?
8-oxidation
What lipid molecules are synthesized in peroxisomes?
Cholesterol and dolichol
Where does the synthesis of bile acids primarily occur?
Peroxisomes
What is the product of the oxidation of ethanol in peroxisomes?
Acetaldehyde
Which reactive oxygen species are detoxified in peroxisomes?
Hydrogen peroxide and superoxide anions
What is the primary function of catalases in peroxisomes?
To convert hydrogen peroxide to water
Which of the following is NOT a process associated with peroxisomes?
Breakdown of amino acids
What is the primary role of peroxisomes in the synthesis of plasmalogens?
Important membrane components synthesis
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