If DNA directs the production of RNA, what does RNA make?
A) RNA makes proteins.
B) RNA makes more DNA.
C) RNA makes membranes.
D) RNA makes hereditary molecules.
A
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In which type of vessel do the walls contain a high proportion of smooth muscle?
a. lymphatic vessels b. arterioles c. capillaries d. venules e. veins
A centromere is least likely to ____
a. divide in anaphase of mitosis b. connect sister chromatids c. attach chromosomes to spindle fibers d. cross over during prophase I of meiosis e. be a component of DNA
Discuss the sexual and asexual reproduction of Rhizopus, the black bread mold. Include the names of
the structures involved. What will be an ideal response?
Intermediate filaments help protect animal cells from mechanical stress because ____________
(a) filaments directly extend from the interior of the cell to the extracellular space and into the next cell, linking one cell to the next, helping to distribute locally applied forces. (b) filaments in each cell are indirectly connected to the filaments of a neighboring cell through the desmosome, creating a continuous mechanical link between cells. (c) filaments remain independent of other cytoskeletal elements and keep the mechanical stress away from other cellular components. (d) filaments make up the desmosome junctions that connect cells; these junctions are more important than the internal network of filaments for protecting cells against mechanical stress.