12. Which statement regarding cell adhesion proteins is FALSE? cel A Desmosomes

Question

12. Which statement regarding cell adhesion proteins is FALSE? cel A Desmosomes can be found in plants, and are analogous to gap junctions, B. Tight junctions can be found between cells lining the small intestine, inhiblting C. Gap junctions are found in the cardiac cells, and allow for quick distribution of D. Desmosomes can attach two cells together and inhibit the two cells from E. There is more than one false answer above. which allow cells to share a cytosol. the contents of the small intestine from entering the circulatory system. a signal or molecule across many cells in a very short amount of time. pulling apart from each other. 13. Vesicles leaving the ER A. May contain proteins within them that function in the nucleus B. May have glycosylated proteins within them. C. Will fuse with the trons side of the Golgi apparatus, allowing for the proteins that they carry to be modified D. wil most likely carry proteins that do not function within the endomembrane system May be taken directly to the the plasma membrane to be secreted E. 14. Which of the following could represent the pathway of a protein entering the cell via receptor mediated endocytosis? The vesicle formed after endocytosis will fuse with the Golgi apparatus so that its contents can be shipped to the lysosome. A. B. The incoming vesicle imports hydrolases from the cytosol in order to degrade C. D. The vesicle may be transported to the ER where the protein will be reshaped. its contents. The vesicle that was formed after endocytosis will eventually fuse with a lysosome, in order to degrade the protein into its monomers. E. Both C &D; are equally likely. 15. A protein that is destined to function in the space between the inner and outer membranes of the nucleus (perinuclear space) will most likely A. Have (had) a stretch of hydrophobic amino acids within the first twenty amino acids of the protein. B. Complete translation on a free ribosome. C. Be transported into the intermembrane space via a nuclear pore complex D. Will be transported into the perinuclear space from the nucleus E. There is more than likely answer above

Explanation / Answer

Desmosomes are not found in plants as plants have plasmodesmata which functions as junctions between plant cells.

Vesciles leaving ER may be taken directly to the plasma membrane where they are secreted out.  These vesciles are selected for the pathways that lead to regulated secretion or sometimes they are send to lysosomes.

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