Peroxisomes: Structure and Function
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Questions and Answers

What is the primary function of peroxisomes in a cell?

  • To rid the cell of toxic peroxides (correct)
  • To participate in the secretory pathway
  • To generate energy for the cell
  • To synthesize proteins

What is the structure of the peroxisome membrane?

  • Single lipid bilayer (correct)
  • Double lipid bilayer
  • Protein-based membrane
  • Carbohydrate-based membrane

Where do peroxisomes bud from?

  • Endoplasmic reticulum (correct)
  • Mitochondria
  • Lysosomes
  • Golgi apparatus

What type of fatty acid oxidation occurs in peroxisomes?

<p>Beta-oxidation (B)</p> Signup and view all the answers

How do peroxisomes replicate?

<p>By enlarging and then dividing (C)</p> Signup and view all the answers

What is the number of genes involved in the synthesis of peroxisomes?

<p>12 genes (A)</p> Signup and view all the answers

What is the function of catalase in the peroxisome?

<p>To convert hydrogen peroxide into water (D)</p> Signup and view all the answers

In which cells does beta-oxidation occur exclusively in the peroxisome?

<p>Yeast and plant cells (D)</p> Signup and view all the answers

What is the product of the oxidative reaction in the peroxisome?

<p>Hydrogen peroxide (C)</p> Signup and view all the answers

What is the function of the peroxisome in liver and kidney cells?

<p>To detoxify various toxic substances (B)</p> Signup and view all the answers

What is the name of the reaction in which hydrogen peroxide is converted into water?

<p>Perooxidation reaction (A)</p> Signup and view all the answers

What is the name of the most abundant phospholipid in myelin, which is formed in the peroxisome?

<p>Plasmalogen (D)</p> Signup and view all the answers

What is the mechanism of protein import into peroxisomes?

<p>A peroxisome targeting signal binds to a soluble receptor protein in the cytosol (D)</p> Signup and view all the answers

What is the result of the failure to metabolize fatty acids properly in X-ALD?

<p>Deterioration of the myelin sheaths of neurons (A)</p> Signup and view all the answers

What is the function of glyoxysomes in plants?

<p>To break down fatty acids (B)</p> Signup and view all the answers

What is a common feature of all peroxisome disorders?

<p>Mutant versions of enzymes found within peroxisomes (A)</p> Signup and view all the answers

What is the location of the receptor protein that binds to the peroxisome targeting signal?

<p>Peroxisome membrane (D)</p> Signup and view all the answers

What is the function of peroxisomes in the synthesis of myelin?

<p>To participate in the synthesis of lipids (B)</p> Signup and view all the answers

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