ement regarding cell adhesion proteins is FALSE? A Desmosomes can be found in pl
ID: 202498 • Letter: E
Question
ement regarding cell adhesion proteins is FALSE? 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, inhibiting 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 smail 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. Vesides leaving the ER A. May contain proteins within them that function in the nucleus. May have glycosylated proteins within them. B. C. Will fuse with the trons side of the Golgi apparatus, allowing for the proteins that they carry to be modified. Will most likely carry proteins that do not function within the endomembrane system. May be taken directly to the the plasma membrane to be secreted. D. E. 14. Which of the following could represent the pathway of a protein entering the cell via receptor mediated endocytosis? A. The vesicle formed after endocytosis will fuse with the Golgi apparatus so that its contents can be shipped to the lysosome. 8. The incoming vesicle imports hydrolases from the cytosol in order to degrade C. D. its contents The vesicle that was formed after endocytosis will eventually fuse with a lysosome, in order to degrade the protein into its monomers. The vesicle may be transported to the ER where the protein will be reshaped. Both C & D are equally likely. E. 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 aboveExplanation / Answer
Answer 12:- Option A
Explanation:- Cell junctions allow cells to adhere to one another in multicellular organisms. Plasmodesmata is are the cell junctions present in plants and not desmosomes. Plasmodesmata are the jinctions which links cytoplasm of adjacent cells and not desmosomes. Plasmodesmata and Gap junctions form channel forming junctions.
Hence option 1 is false, and therefore is correct answer.
Gap junctions in cardiac cells help passing of the signal efficiently that allows the heart muscle cells to contract in unison. The occluding junctions such as tight junctions in small intestine seal gaps between cells, making an impermeable barrier
Hence option B and C are true.
The desmosomes forms anchoring junctions, which transmit stress through tethering to cytoskeleton and are cell–cell or cell–matrix. The desmosomes thus prevent cells from pulling apart from each other.
Hence option D is true.
Thus, the correct answer is option A.
Answer 13:-Option C
Explanation:- Vesicles leaving the endoplasmic reticulum (ER) carry the properly folded, assembled proteins (not glycosylated) to the trans site of the golgi apparatus, where these proteins are modified and then prepared for their action and release at the plasma membrane. The ER, golgi apparatus and vesicles are present in cytosol and the proteins that the ER produces are for intracellular or extracellular function and are proteins to be carried to nucleus.
Answer 14:- Option C
Explanation:- Endocytosis is a process by which cells internalize extracellular material, ligands, and plasma membrane proteins and lipids. The vesicles (receptor mediated) can be controlled by the receptor action. These vesicles carry the extracellular material to lysosomes or early endosomes, where it can be degraded into monomers. Hence option C is correct
Answer 15:- Option E
Explanation:- The space between the inner and outer membranes is called the perinuclear space. This region is region contiguous with the lumen (inside) of the endoplasmic reticulum. The nuclear membrane also has many small holes called nuclear pores that link inner and outer membranes. The outer nucleus membrane has ribosomes that synthesize proteins which are transported into the perinuclear space. Thus, the options mentioned for the answer are not sufficient.
The likely answer is not mentioned in the options A-D. Therefore correct answer is E.
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