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BS 161 EXAM 1 QUESTIONS WITH CORRECT ANSWERS

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BS 161 EXAM 1 QUESTIONS WITH CORRECT ANSWERS

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Plasma membrane:


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Encases a semifluid matrix called the cytoplasm




What functions do microtubules have?


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used to move vesicles within cells and made of dimers of alpha- and bea-
tubulin




What are characteristics of desmosome?

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Destruction of intermediate filaments by cancers of epithelial tissues, adds
strength in epithelial tissue of the top layer of the skin and allows flexibility
when stretching.




What characteristics of gap junction?


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Allows immediate communication between cells such as 2 neurons, allows
types of smooth muscle and cardiac muscle to contract in unison.




Atoms have gained or lost electrons and are no longer electrically neutral are called
_____.


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Ions




Centrosome:


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Region surrounding the centrioles

,Lysosomes:


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Membrane bounded digestive vesicles, that are also components of the
endomembrane system




What are some properties of interior protein network?


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Helps determine the overall shape of a cell




Denaturation:


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If proteins environment is altered, the protein may change shapes or unfold
completely.




Rough ER (RER):


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Site of protein synthesis has pebbly surface

, What characteristics of a tight junction?


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Resists the movement of material into and out of capillaries in the brain.
holds together endothelial cells and seals epithelial cells to each other
right beneath their surface on the top layer of skin.




In the stable form of protein, what is generally oriented to the interior of the protein
molecule?


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Hydrophobic portions




What are some characteristics of phospholipids


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They contain a glycerol backbone, the phosphate head group is polar and
the molecule is an important part of cell membranes




What type of cells are in Smooth ER?


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