Which of the Following Statements About Microtubules Is True

Motor proteins participate in movements associated with both filaments. A Motor proteins move in a directional fashion along microtubules by using the inherent structural polarity of a protofilament.

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Because micrtubules are subject to.

. O B Actin filaments and microtubules but not intermediate filaments have an inherent polarity with a plus end that grows more quickly than the minus - end. Kinesin is a motor protein that moves towards the minus end of a microtubule. A centrosome is an example of a MTOC microtubule organizing center.

Motor proteins move in a directional fashion along microtubules by using the inherent structural polarity of a protofilament. A Motor proteins move in a directional fashion along microtubules by using the inherent structural polarity of a protofilament. Both filaments originate from a centrosome.

Which of the following statements about animal connective tissues is TRUE. E All of these are true. Microtubules are involved in moving chromosomes from the.

Anaphase occurs after metaphase where sister chromatids move toward opposite poles as chromosomes and motor proteins with microtubules help in this process. 17-21 Which of the following statements about microtubules is true. A Motor proteins move in a directional fashion along microtubules by using the inherent structural polarity of a protofilament.

Both are necessary for cell division. Which of the following statements about microtubules is true. Microtubules are part of the 9 2 formation in bacterial flagella.

D The mitotic spindle helps segregate the chromosomes to the two daughter cells. Both are composed of globular subunits. D Kinetochore microtubules shrink at both ends.

-Movement of cilia and flagella is the result of motor proteins causing microtubules to move relative to each other-The dynamic aspect of cytoskeletal function is made possible by the assembly and disassembly of a large number of complex proteins into larger aggregates. They are able to move vesicles and other storage inclusions. C The contractile ring divides the nucleus in two.

B The centromere nucleates the microtubules of the mitotic spindle. They serve a cytoskeletal area. Check all statements that are true about movement along microtubules.

Both types of filaments display dynamic instability. B The centromere nucleates the microtubules of the mitotic spindle. Which of the following statements is TRUE.

Which of the following statements is TRUE. Energy is required in the form of GTP hydrolysis. Which of the following statements about microtubules is true.

Energy is required in the form of ATP hydrolysis. Which of the following statements about the cytoskeleton is TRUE. They are linear polymers of tubulin.

The microtubules attached to a given kinetochore extend to both poles of the spindle. Gamma tubulin nucleates the assembly of new microtubules in the cell. E All of these are true.

They are made up of two centrioles which are right angled to each other and is composed of a protein known as tubulin. Cytokinesis in plant cells occurs by means of a cleavage furrow. Multiple Choice Those attached to chromosomes elongate while those that are unattached shorten.

Centromeres divide during metaphase. A Motor proteins move in a directional fashion along microtubules by using the inherent structural polarity of a protofilament. B Enzymes embedded in the plasma membrane synthesize the collagen in the extracellular matrix.

C Because microtubules are subject to dynamic instability they are used only for transient. C Because microtubules are subject to dynamic instability they are used. Movement of cilia and flagella is the result of motor proteins causing microtubules to move relative to each other.

Those attached to chromosomes shorten while those that are unattached elongate. E None of the above. A The mitotic spindle is largely made of intermediate filaments.

Which statement regarding the cell cycle is true. B The centromere nucleates the microtubules of the mitotic spindle. O A The cytoskeleton provides a rigid and unchangeable structure important for the shape of the cell.

Which of the following statements is TRUE. A Motor proteins move in a directional fashion along microtubules by using the inherent structural polarity of a protofilament. B In cells in which anaphase B predominates the spindle will elongate much less than in cells in which anaphase A dominates.

B The centromere nucleates the microtubules of the mitotic spindle. Neurofilaments intermediate filaments C. Which of the following statements about the cytoskeleton is true.

17-15 Which of the following statements about microtubules is true. The centromere nucleates the microtubule of the mitotic spindle c. Both attached and unattached microtubules shorten.

Microtubules do not undergo polymerization or depolymerization until the cell receives a signal Polymerization is favored when tubulin is bound to GDP. B The centromere nucleates the microtubules of the mitotic spindle. B The contractile ring is made largely of microtubules and actin filaments.

Which of the following is true regarding a migrating cell. A Anaphase A must be completed before anaphase B can take place. Which of the following statements about microtubules is true.

All of the following statements are true of microtubules and actin filaments EXCEPT. Which of the following isare TRUE statements regarding microtubules. E both attached and unattached microtubules elongate at first and then shorten.

Which of the following statements about microtubules during anaphase are TRUE. The plus end of microtubules is oriented towards the leading front of the cell. C In anaphase A both kinetochore and interpolar microtubules shorten.

Select ALL that are TRUE a. More than one of the above are correct. Gamma tubulin is found at the plus end of growing microtubules.

Kinesin is a motor protein that moves towards the plus end of a microtubule. They make up the thin myofilament actin in skeletal muscle. Microtubules can be prevented from functioning by a respiratory inhibitor.

18-44 Which of the following statements is true. So the statement is true. Which of the following statements about microtubules is true.

A Keratin filaments secreted into the extracellular matrix are important for providing mechanical strength to connective tissues. C Because microtubules are subject to dynamic instability they are used. Polymerization occurs predominantly at the minus -.

Those attached to chromosomes shorten while those that are unattached elongate.

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