Self Quiz for Eukaryotic Cell Structure: The Cytoskeleton

Self Quiz for Eukaryotic Cell Structure: The Cytoskeleton Tutorial

Study the material in this section and then write out the answers to these questions.
Do not just click on the answers and write them out. This will not test your understanding of this tutorial.

1. Match the following:

_____ Located near the nucleus and appear as cylindrical structures consisting of a ring of nine evenly spaced bundles of three microtubules. They play a role in the formation of cilia and flagella and in separating the chromosomes during mitosis. (ans)

_____ Hollow tubes made of subunits of the protein tubulin. They provide structural support for the cell and play a role in cell division, cell movement, and movement of organelles within the cell. They are also components of centrioles, cilia, and flagella. (ans)

_____ Tough fibers made of polypeptides. They help to strengthen the cytoskeleton and stabilize cell shape. (ans)

_____ Solid, rodlike structures composed of actin. They provide structural support, and play a roll in phagocytosis, cell and organelle movement, and cell division. (ans)

_____ Consist of 9 fused pairs of protein microtubules with side arms of the motor molecule dynein that originate from a centriole. These form a ring around an inner central pair of microtubules that arise from a plate near the cell surface. The arrangement of microtubules is known as a 2X9+2 arrangement. This complex of microtubules is surrounded by a sheath continuous with the cytoplasmic membrane. (ans)

a. microtubules
b. microfilaments
c. intermediate filaments
d. centrioles
e. flagella and cilia

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