Electron Microscopist Question:

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Which of the following is NOT a mechanism for a cell to degrade its own cytosolic proteins?
A) Autophagic vacuoles
B) Phagocytosis and secondary lysosome fusion.
C) 26S Proteosome degradation.
D) All the above are correct mechanisms

Electron Microscopist Interview Question

Answer:

B) Phagocytosis and secondary lysosome fusion.

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When Listeria monocytogenes invades a eucaryotic cell, it secretes the ActA protein that:
A) polymerizes actin filaments, causing the bacterium to move through the cytoplasm.
B) depolymerizes microfilaments, allowing the bacterium to move more easily in the cytoplasm.
C) degrades the cytoskeleton, allowing the bacterium to travel through the plasma membrane to adjacent cells.
D) attaches to microtubules, allowing the bacterium to move along the fibers

Colchicine treatment of cells to disrupt microtubules can result in
A) loss of cell shape
B) loss of directional movement.
C) loss of nutrient transport.
D) all of the above