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Cytoskeleton Structure and Function Quiz

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Cytoskeleton Structure and Function Quiz

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Questions and Answers

What is the function of motor proteins in cells?

Creating lateral arms linking actin to the plasma membrane

Regulating microtubule structure and function

Binding to a polarized cytoskeletal filament and using ATP to move along it (correct)

Stabilizing microtubules in axons

Which motor protein is involved in forming lateral arms linking actin to the plasma membrane?

Myosin I (correct)

Dyneins

Kinesins

Myosin II

What is the major function of Microtubule Associated Proteins (MAPs)?

Stabilizing microtubules in axons

Regulating microtubule structure and function (correct)

Forming lateral arms linking actin to the plasma membrane

Providing cellular movement

Where is the Centrosome, a Microtubule Organizing Center (MTOC), located?

Consists of two centrioles in a matrix of accessory proteins Signup and view all the answers

Which microtubules are directly involved in the separation of chromosomes during cell division?

Kinetochore microtubules Signup and view all the answers

What is a major difference between Actin Filaments and Microtubules in terms of their structure?

Microtubules have GTP/GDP bound nucleotides while Actin Filaments undergo nucleotide hydrolysis Signup and view all the answers

What is the primary function of actin filaments in the cytoskeleton?

Structural support and motility Signup and view all the answers

Which of the following statements about actin filaments is true?

They are polar structures Signup and view all the answers

What is the primary function of the cross-linking protein fimbrin?

Organizing actin filaments into tight, parallel bundles in microspikes and filopodia Signup and view all the answers

Which of the following actin networks is specialized for sensing sound in the ear?

Stereocilia Signup and view all the answers

Which of the following actin gene families is primarily expressed in non-muscle tissues?

Non-muscle tissue Signup and view all the answers

What is the diameter of intermediate filaments in the cytoskeleton?

10 nm Signup and view all the answers