c. endomembrane system check your learning
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Endomembrane System
Cell Structure
Which of these organelles are not part of the endomembrane system of a eukaryotic cell?
A) Rough and smooth endoplasmic reticulum
B) Mitochondria and chloroplasts
C) Nuclear membrane
D) Lysosomes and cell membrane
Cell Structure
Which of these organelles make up the endomembrane system of a cell?
A) Rough and smooth endoplasmic reticulum
B) Mitochondria and chloroplasts
C) Nuclear membrane
D) Lysosomes and cell membrane
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Cell Structure
How does the structure of the endoplasmic reticulum help with the transport of proteins?
A) The ER is a series of hollow tubes through which proteins synthesized by ribosomes in the RER can move, ultimately ending up in a Golgi body, then a vesicle, and then the cell membrane.
B) The ER is completely covered with ribosomes that move around the cell, carrying proteins. .
C) The ER can attach itself directly to the cell membrane to move proteins out of the cell.
D) The ER tubes connect with the nucleus for direct transport of ribosomes to its membranes.
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Cell Structure
How does the structure of the endoplasmic reticulum help with the transport of proteins?
A) The ER is a series of hollow tubes through which proteins synthesized by ribosomes in the RER can move, ultimately ending up in a Golgi body, then a vesicle, and then the cell membrane.
B) The ER is completely covered with ribosomes that move around the cell carrying proteins
C) The ER can attach itself to the cell membrane to move proteins out of the cell.
D) The ER tubes connect with the nucleus for direct transport of ribosomes to its membranes.
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Cell Structure
Which part of the Golgi apparatus is responsible for the secretion of materials into the vesicles?
A) the cis face
B) the trans face
C) the rough ER
D) the smooth ER
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Cell Structure
Which part of the Golgi apparatus is responsible for the secretion of materials into the vesicles?
A) the cis face
B) the trans face
C) the rough ER
D) the smooth ER
Cell Structure
If a peripheral membrane protein were synthesized in the lumen (inside) of the ER, would it end up on the inside or outside of the plasma membrane?
A) It could be either.
B) All peripheral membrane proteins end up on the periphery (outside) of cell membranes.
C) All peripheral membrane proteins end up on the periphery (inside) of cell membranes.
D) All proteins synthesized by ribosomes in the RER end up in the cytoplasm.
Cell Structure
If a peripheral membrane protein were synthesized in the lumen (inside) of the ER, would it end up on the inside or outside of the plasma membrane?
A) It could be either.
B) All peripheral membrane proteins end up on the periphery (outside) of cell membranes.
C) All peripheral membrane proteins end up on the periphery (inside) of cell membranes.
D) All proteins synthesized by ribosomes in the RER end up in the cytoplasm.
Cell Structure
Why is the Rough Endoplasmic Reticulum (RER) called “rough”?
A) Because it is the location where many steroids are synthesized which accumulate in the ER making it look rough when examined by electron microscope.
B) Because it contains many ribosomes embedded in its’ cytosolic surface making it look rough when examined by electron microscope
C) Because it is the location of all protein synthesis and proteins make the ER look rough.
D) Because Francis Rough, a British scientist, discovered the ER.
Cell Structure
Why is the Rough Endoplasmic Reticulum (RER) called “rough”?
A) Because it is the location where many steroids are synthesized which accumulate in the ER making it look rough when examined by electron microscope.
B) Because it contains many ribosomes embedded in its’ cytosolic surface making it look rough when examined by electron microscope
C) Because it is the location of all protein synthesis and proteins make the ER look rough.
D) Because Francis Rough, a British scientist, discovered the ER.
Cell Structure
Which of the following is not a function of the Smooth Endoplasmic Reticulum (SER)?
A) Steroid synthesis
B) Detoxification of many toxins.
C) Carbohydrate synthesis
D) Calcium ion storage (ie. in heart cells)
E) All of these are functions!
Cell Structure
Which of the following is not a function of the Smooth Endoplasmic Reticulum (SER)?
A) Steroid synthesis
B) Detoxification of many toxins.
C) Carbohydrate synthesis
D) Calcium ion storage (i.e., in heart cells)
E) All of these are functions!
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Cell Structure
How do lysosomes dispose of cellular waste products?
A) They change the waste back into usable cell parts.
B) They expel the waste products from the cell through the membrane.
C) They produce enzymes that digest and break down the waste.
D) They take the waste products and convert them to additional genetic material.
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Cell Structure
How do lysosomes dispose of cellular waste products?
A) They change the waste back into usable cell parts.
B) They expel the waste products from the cell through the membrane.
C) They produce enzymes that digest and break down the waste.
D) They take the waste products and convert them to additional genetic material.
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Cell Structure
A key role of peroxisomes includes:
A) the ability to act as highly-reactive products to produce ATP and oxygen metabolism.
B) the transportation of diseased cells throughout the body.
C) the ability to perform lipid metabolism and chemically neutralize free radicals.
D) the ability to congregate in large amounts within cancer cells to neutralize them.
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Cell Structure
A key role of peroxisomes includes:
A) the ability to act as highly-reactive products to produce ATP and oxygen metabolism.
B) the transportation of diseased cells throughout the body.
C) the ability to perform lipid metabolism and chemically neutralize free radicals.
D) the ability to congregate in large amounts within cancer cells to neutralize them.