The Endomembrane System and Proteins

Review Questions

Which of the following is not a component of the endomembrane system?

  1. mitochondrion
  2. Golgi apparatus
  3. endoplasmic reticulum
  4. lysosome

Hint:

A

The process by which a cell engulfs a foreign particle is known as:

  1. endosymbiosis
  2. phagocytosis
  3. hydrolysis
  4. membrane synthesis

Hint:

B

Which of the following is most likely to have the greatest concentration of smooth endoplasmic reticulum?

  1. a cell that secretes enzymes
  2. a cell that destroys pathogens
  3. a cell that makes steroid hormones
  4. a cell that engages in photosynthesis

Hint:

C

Which of the following sequences correctly lists in order the steps involved in the incorporation of a proteinaceous molecule within a cell?

  1. protein synthesis of the protein on the ribosome; modification in the Golgi apparatus; packaging in the endoplasmic reticulum; tagging in the vesicle
  2. synthesis of the protein on the lysosome; tagging in the Golgi; packaging in the vesicle; distribution in the endoplasmic reticulum
  3. synthesis of the protein on the ribosome; modification in the endoplasmic reticulum; tagging in the Golgi; distribution via the vesicle
  4. synthesis of the protein on the lysosome; packaging in the vesicle; distribution via the Golgi; tagging in the endoplasmic reticulum

Hint:

C

Congenital disorders of glycosylation are a growing class of rare diseases. Which organelle would be most commonly involved in the glycoprotein disorder portion of the group?

  1. RER
  2. ribosomes
  3. endosomes
  4. Golgi apparatus

Hint:

D