Microtubules

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Which cellular structures have a major structural role in eukaryotic cilia and flagella?

Microtubules (correct)

Intermediate filaments

Actin filaments

Nucleosomes

What is the main function of flagella in cells?

To move cells in an aqueous environment (correct)

To move fluid around a cell

To hold cells sheets together

To provide mechanical stability to cells

What is the main function of cilia in cells?

To move cells in an aqueous environment

To hold cells sheets together

To move fluid around a cell (correct)

To provide mechanical stability to cells

Which drug blocks microtubules and is used in cancer therapy?

Taxol (Paclitaxel) Signup and view all the answers

Which cellular structures are associated with cell-cell junctions and strengthening cells?

Intermediate filaments Signup and view all the answers

Which cellular structures form a protective cage for the cell's DNA?

Intermediate filaments Signup and view all the answers

Which cellular structures help nerve cells extend long and robust axons?

Intermediate filaments Signup and view all the answers

Which protein travels towards the (+) end of the microtubule?

Kinesin Signup and view all the answers

What causes the microtubule to shrink?

GTP hydrolysis Signup and view all the answers

What is the major microtubule organizing center (MTOC) in animal cells?

Centrosome Signup and view all the answers

Which type of microtubule is responsible for aligning and segregating the chromosomes during cell division?

Bipolar mitotic spindle Signup and view all the answers

What is the function of MAPs (Microtubule-associated proteins)?

Move organelles and vesicles within the cell Signup and view all the answers

Which protein transports intracellular cargos towards the (-) end of the microtubule?

Dynein Signup and view all the answers

What can selectively stabilize the microtubules and polarize a cell?

MAPs Signup and view all the answers

Which proteins make up the tubulin subunit?

Alpha-tubulin and beta-tubulin Signup and view all the answers

What is the function of microtubules?

Cellular transport Signup and view all the answers

What is the role of GTP in microtubules?

GTP is bound to alpha-tubulin and is not hydrolyzed nor exchanged Signup and view all the answers

How are microtubules structured?

Hollow cylindrical structures built from protofilaments Signup and view all the answers

What is dynamic instability in microtubules?

The coexistence of assembly and disassembly at the ends of a microtubule Signup and view all the answers

Which proteins are associated with microtubules?

Microtubule-associated proteins (MAPs) Signup and view all the answers

What are some examples of structures that contain microtubules?

Cilia and flagella Signup and view all the answers

Which protein structure is the central building block of intermediate filaments?

Coiled-coil Signup and view all the answers

Which type of cells produce keratin filaments in the epidermis?

Keratinocytes Signup and view all the answers

What is the clinical usefulness of the diversity of keratins?

Diagnosis of carcinoma Signup and view all the answers

Which genetic diseases can be caused by mutation in keratin genes?

Epidermolysis bullosa simplex and pachyonychia congenita Signup and view all the answers

What is the main effect of mutation in keratin genes in epidermolysis bullosa simplex (EBS)?

Blistering of the epidermis Signup and view all the answers

Which intermediate filament is responsible for the mechanical stability of the cell nucleus?

Lamin Signup and view all the answers

What is the function of neurofilaments in vertebrate neurons?

Provide strength and stability to the axon Signup and view all the answers

What is the diameter of microfilaments?

7-8 nm Signup and view all the answers

Which protein subunits make up microtubules?

Tubulin Signup and view all the answers

Microtubules

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Questions and Answers

Which cellular structures have a major structural role in eukaryotic cilia and flagella?

What is the main function of flagella in cells?

What is the main function of cilia in cells?

Which drug blocks microtubules and is used in cancer therapy?

Which cellular structures are associated with cell-cell junctions and strengthening cells?

Which cellular structures form a protective cage for the cell's DNA?

Which cellular structures help nerve cells extend long and robust axons?

Which protein travels towards the (+) end of the microtubule?

What causes the microtubule to shrink?

What is the major microtubule organizing center (MTOC) in animal cells?

Which type of microtubule is responsible for aligning and segregating the chromosomes during cell division?

What is the function of MAPs (Microtubule-associated proteins)?

Which protein transports intracellular cargos towards the (-) end of the microtubule?

What can selectively stabilize the microtubules and polarize a cell?

Which proteins make up the tubulin subunit?

What is the function of microtubules?

What is the role of GTP in microtubules?

How are microtubules structured?

What is dynamic instability in microtubules?

Which proteins are associated with microtubules?

What are some examples of structures that contain microtubules?

Which protein structure is the central building block of intermediate filaments?

Which type of cells produce keratin filaments in the epidermis?

What is the clinical usefulness of the diversity of keratins?

Which genetic diseases can be caused by mutation in keratin genes?

What is the main effect of mutation in keratin genes in epidermolysis bullosa simplex (EBS)?

Which intermediate filament is responsible for the mechanical stability of the cell nucleus?

What is the function of neurofilaments in vertebrate neurons?

What is the diameter of microfilaments?

Which protein subunits make up microtubules?

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