Cytoskeleton Components Quiz OSR

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Questions and Answers

Which of the following is a component of the cytoskeleton?

Microtubule (correct)

Bone

Cartilage

Chitin

Which is NOT a feature of actin filaments?

Stabilise position of organelles! (correct)

Support microvilli

Provide basic shape support

Generate movements

The trigger to initiate the contractile process in skeletal muscle is:

Calcium binding to tropomyosin

Calcium binding to troponin! (correct)

ATP binding to the myosin cross bridges

Potassium binding to myosin

Cytoskeletal filaments that display "dynamic instability:”

Change in length due to polymerization or depolymerization! Signup and view all the answers

During contraction of a sarcomere:

Actin filaments are pulled toward the center of the sarcomere Signup and view all the answers

All of the following statements are true of microtubules and actin filaments, EXCEPT:

Both filaments originate from a centrosome Signup and view all the answers

__________made of fibrous proteins under the Keratin family

Intermediate filaments Signup and view all the answers

The ciliary action of the cells lining the lumen of fallopian tube are responsible for transporting an egg from the ovaries to the uterus. Which cytoskeleton structures are linked to this movement?

Microtubules Signup and view all the answers

Which cytoskeletal structure is linked with the movements of a macrophage?

Actin filaments Signup and view all the answers

Dynein and Kinesin:

Are motor proteins that generate movements associated with microtubules Signup and view all the answers

DNA replicates during ___________.

S phase Signup and view all the answers

What is the next stage after TELOPHASE in the cell cycle?

Cytokinesis Signup and view all the answers

What would be the most obvious outcome of repeated cell cycles consisting of S phase and M phase only?

The cells produced would get smaller and smaller Signup and view all the answers

Which one of the following statements best describes the mechanism by which the "cell cycle control system" regulates events of the cell cycle?

Protein activity is regulated through phosphorylation and dephosphorylation Signup and view all the answers

Apoptosis involves all of the following events, EXCEPT:

triggering of inflammation Signup and view all the answers

Which of the following groups of proteins associate with kinases and are synthesized and degraded at specific points during the cell cycle?

Cyclins Signup and view all the answers

The contractile ring formed during animal cell division is formed of:

Myosin and actin filaments Signup and view all the answers

Ions can travel directly from the cytoplasm of one animal cell to the cytoplasm of an adjacent cell through

gap junctions Signup and view all the answers

A cell can crawl through a tissue because of the transmembrane ______________ proteins that can bind to fibronectin outside of the cell.

integrin Signup and view all the answers

What is the word that describes uncontrollable cell proliferation forming malignant tumors that can result in the invasion of surrounding healthy tissues?

Cancer Signup and view all the answers

The life span of human nerve cells is approximately

none of the above Signup and view all the answers

What is the most important property of a cancer cell, whether it is in the body or the culture dish?

its loss of growth contro Signup and view all the answers

Cell-cell anchoring junctions with intermediate filaments are called?

Desmosomes Signup and view all the answers

Which of the following is considered to be a fibrous protein?

Keratin Signup and view all the answers

Microtubules are made of?

Protein Signup and view all the answers

Spindle fibers are made up of which type of components?

Tubulin Signup and view all the answers

The trigger to initiate the contractile process in skeletal muscle is:

Calcium binding to troponin Signup and view all the answers

Which of the following statements are true regarding actin?

They form microvilli Signup and view all the answers

Which of the following participate in the formation vesicle?

Clathrin Signup and view all the answers

The life span of human small intestine epithelial cells is approximately:

Between 3 and 5 days Signup and view all the answers

Cells that are terminally differentiated__________

Can no longer undergo cell division Signup and view all the answers

Which one of the following statments best describe the mechanism by the cell cycle control system regulates events of the cell cycle?

Protein activity is regulated through phosphorylation and dephosphorylation Signup and view all the answers

Which of the following statements is incorrect about the G0 phase?

Mitosis occurs after the G0 phase Signup and view all the answers

Apoptosis plays an important role in normal human growth. How is apoptosis involved in normal embryological development?

Unnecessary parts of the body that normally develop in the embryo are removed with apoptosis Signup and view all the answers

Identify two stages of the mitotic phase

Prophase and metaphase Signup and view all the answers

There are two main processes in the M (mitotic) phase. Which process occurs last?

Cytokinesis Signup and view all the answers

What is the next stage after TELEPHASE in the cell cycle?

Cytokinesis Signup and view all the answers

Which of the following are external regulators (proteins) of the cell cycle?

Growth factors Signup and view all the answers

Identify two of the mitotic phases.

Prometaphase Signup and view all the answers

Cell-basal lamina anchoring junctions with intermediate filaments are called?

Hemidesmosomes Signup and view all the answers

What is the most important property of a cancer cell, whether it is in the body or the culture dish?

Its loss of growth control Signup and view all the answers

Proteoglycans in the extracellular matrix of animal tissues_________

Allow cartilage to resist compression Signup and view all the answers

Adherens junctions play an important role in development; they are composed of:

Carherins linked to other cadherins extracellularly and to actin filaments intracellularly Signup and view all the answers

Which of the following statements about desmosomes is true?

They are associated with intermediate filaments Signup and view all the answers

Study Notes

Cytoskeleton Components and Functions

Cytoskeleton includes microtubules, actin filaments, and intermediate filaments.
Actin filaments are not characterized by dynamic instability; they are typically stable.
Contractile process in skeletal muscle is initiated by calcium ion release from the sarcoplasmic reticulum.
Cilia in fallopian tube are made of microtubules, facilitating egg transport.
Macrophage movement involves actin filaments.
Dynein and Kinesin are motor proteins that transport cellular materials along microtubules.

Cell Cycle and Apoptosis

DNA replicates during the S phase of the cell cycle.
After telophase, the next phase is cytokinesis.
Repeating S and M phases without G1 or G2 phases leads to increased cell numbers without growth.
The cell cycle control system regulates events through checkpoints and cyclins.
Apoptosis includes DNA fragmentation but does not include inflammation; it’s a programmed cell death process.

Proteins and Junctions

Cyclins are proteins that associate with kinases and regulate the cell cycle.
The contractile ring during animal cell division is made of actin filaments and myosin.
Ions travel between animal cells through gap junctions, allowing intercellular communication.
Transmembrane integrin proteins enable cells to migrate by binding to fibronectin in the extracellular matrix.
Cancer is characterized by uncontrollable cell proliferation and the potential for invasion of surrounding tissues.

Lifespan and Differentiation of Cells

Human nerve cells can live for many years, often until the organism dies.
Cancer cells exhibit properties such as rapid division and loss of differentiation.
Cell-cell anchoring junctions associated with intermediate filaments are called desmosomes.
Microtubules are constructed from tubulin dimers, their dynamic structures serve various cellular functions.

Junctions and ECM Components

Spindle fibers are primarily made up of microtubules.
Terminally differentiated cells have exited the cell cycle and no longer divide.
Desmosomes provide mechanical strength and stability at cell-cell junctions.
Proteoglycans in the extracellular matrix assist with cell signaling and structural support.
Adherens junctions, important in tissue development, are composed of cadherin proteins linked to actin filaments.

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Test your knowledge on the various components of the cytoskeleton. This quiz will challenge your understanding of cytoskeletal structures and their functions in biological systems. Get ready to explore the essential parts that support cellular integrity.

Cytoskeleton Components Quiz OSR

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Questions and Answers

Which of the following is a component of the cytoskeleton?

Which is NOT a feature of actin filaments?

The trigger to initiate the contractile process in skeletal muscle is:

Cytoskeletal filaments that display "dynamic instability:”

During contraction of a sarcomere:

All of the following statements are true of microtubules and actin filaments, EXCEPT:

__________made of fibrous proteins under the Keratin family

The ciliary action of the cells lining the lumen of fallopian tube are responsible for transporting an egg from the ovaries to the uterus. Which cytoskeleton structures are linked to this movement?

Which cytoskeletal structure is linked with the movements of a macrophage?

Dynein and Kinesin:

DNA replicates during ___________.

What is the next stage after TELOPHASE in the cell cycle?

What would be the most obvious outcome of repeated cell cycles consisting of S phase and M phase only?

Which one of the following statements best describes the mechanism by which the "cell cycle control system" regulates events of the cell cycle?

Apoptosis involves all of the following events, EXCEPT:

Which of the following groups of proteins associate with kinases and are synthesized and degraded at specific points during the cell cycle?

The contractile ring formed during animal cell division is formed of:

Ions can travel directly from the cytoplasm of one animal cell to the cytoplasm of an adjacent cell through

A cell can crawl through a tissue because of the transmembrane ______________ proteins that can bind to fibronectin outside of the cell.

What is the word that describes uncontrollable cell proliferation forming malignant tumors that can result in the invasion of surrounding healthy tissues?

The life span of human nerve cells is approximately

What is the most important property of a cancer cell, whether it is in the body or the culture dish?

Cell-cell anchoring junctions with intermediate filaments are called?

Which of the following is considered to be a fibrous protein?

Microtubules are made of?

Spindle fibers are made up of which type of components?

The trigger to initiate the contractile process in skeletal muscle is:

Which of the following statements are true regarding actin?

Which of the following participate in the formation vesicle?

The life span of human small intestine epithelial cells is approximately:

Cells that are terminally differentiated__________

Which one of the following statments best describe the mechanism by the cell cycle control system regulates events of the cell cycle?

Which of the following statements is incorrect about the G0 phase?

Apoptosis plays an important role in normal human growth. How is apoptosis involved in normal embryological development?

Identify two stages of the mitotic phase

There are two main processes in the M (mitotic) phase. Which process occurs last?

What is the next stage after TELEPHASE in the cell cycle?

Which of the following are external regulators (proteins) of the cell cycle?

Identify two of the mitotic phases.

Cell-basal lamina anchoring junctions with intermediate filaments are called?

What is the most important property of a cancer cell, whether it is in the body or the culture dish?

Proteoglycans in the extracellular matrix of animal tissues_________

Adherens junctions play an important role in development; they are composed of:

Which of the following statements about desmosomes is true?

Study Notes

Cytoskeleton Components and Functions

Cell Cycle and Apoptosis

Proteins and Junctions

Lifespan and Differentiation of Cells

Junctions and ECM Components

Studying That Suits You

Description

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