Dynamic instability of microtubules:
A. is caused by the large size of this type of
cytoskeletal element.
B. results from a deficiency of free tubulin
subunits.
C. allows microtubules to perform their
functions.
D. is shared by other cytoskeletal elements.
E. All of these choices are correct.
C
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Which type of cellular junction allows for the movement of proteins and transfer RNA molecules?
A. desmosomes B. plasmodesmata C. gap junctions D. Answers b and c are both correct.
Development of cancer in cells within lymph nodes is called
A) in situ. B) lymphoma. C) leukemia. D) keratosis. E) cervical.
Which event would most likely result in the creation of large numbers of fossils?
A) a drought B) an earthquake C) a fire D) a volcano
From what is the lipid-containing outer envelope surrounding the viral capsid of many animal viruses derived?
A) the outer membrane of the chloroplast B) the outer mitochondrial membrane C) the nuclear envelope D) the plasma membrane E) the lysosomal membrane