Which statement best describes transcytosis? Question 40 options: A) recycling the contents of the endosome back to the surface of the cell B) transporting an endosome from one side of a cell to the other and releasing the contents by exocytosis C) storing the contents of the endosome D) combining an endosome with a lysosome and degrading or releasing the contents
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" Transcytosis is a cellular process where materials are transported across a cell, typically from one side of the cell membrane to the other, involving endocytosis and exocytosis. Show more…
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Which of the following correctly describes some aspect of exocytosis or endocytosis? a. Endocytosis and exocytosis involve passive transport. b. The inner surface of a transport vesicle that fuses with or buds from the plasma membrane is most closely related to the inner surface of the plasma membrane. c. Exocytosis and endocytosis change the surface area of the plasma membrane. d. These two processes require the participation of mitochondria. e. Both processes provide a mechanism for exchanging membrane-impermeable molecules between the organelles and the cytosol.
Adi S.
Which of the following statements about bulk transport is ACCURATE? a. Pinocytosis selectively brings dissolved ions into cells that need them. b. Endocytosis is common in prokaryotic cells but is rarely seen in eukaryotic cells. c. Proteins made in the endomembrane system are released from the cell by exocytosis. d. Bulk transport is a passive process, as it does not require energy.
Membranes
Bulky Materials Cross Membranes Within Vesicles
Which of the following is NOT true of receptor-mediated endocytosis? Select one: a. In receptor-mediated endocytosis, extracellular substances are internalized in clathrin-coated vesicles. b. Some viruses are taken into the cell by receptor-mediated endocytosis. c. In receptor-mediated endocytosis, internalized vesicles fuse with lysosomes, which then mature into endosomes. d. Low-density lipoproteins (LDLs) are taken into cells by receptor-mediated endocytosis. Which of the following is true of lysosomes? Select one: a. Most of the lysosomal membrane proteins have glycosylated regions on the cytosolic side of the membrane. b. Lysosomes have a pH that is higher than that of the cytosol. c. Lysosomes form from vesicles that pinch off from the endoplasmic reticulum. d. Lysosomal enzymes are optimally active in the acidic conditions maintained within lysosomes. e. The products of digestion in lysosomes leave the lysosome by transport vesicles. Which of the following pathways does NOT deliver materials to endosomes or lysosomes? Select one: a. Pinocytosis b. Autophagy c. Endocytosis d. Phagocytosis e. Exocytosis
Rupsa S.
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