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Questions and Answers
Which cytoskeleton component is essential for cell motility and is involved in the formation of the contractile ring during cytokinesis?
Which cytoskeleton component is essential for cell motility and is involved in the formation of the contractile ring during cytokinesis?
- Cilia
- Actin filaments (correct)
- Intermediate filaments
- Microtubules
What specific structural configuration defines a centriole?
What specific structural configuration defines a centriole?
- Nine triplets of microtubules (correct)
- Random configuration of protein filaments
- Nine doublets surrounding a central triplet
- A single microtubule arrangement
Which of the following structures is primarily responsible for separating chromosomes during mitosis?
Which of the following structures is primarily responsible for separating chromosomes during mitosis?
- Kinetochores
- Spindle apparatus (correct)
- Centrioles
- Centrosome
Which organelle's main function involves the synthesis of transport vesicles critical for cellular export?
Which organelle's main function involves the synthesis of transport vesicles critical for cellular export?
Which structure uses coordinated beating to move substances across the epithelial surface in the respiratory tract?
Which structure uses coordinated beating to move substances across the epithelial surface in the respiratory tract?
Flashcards
What is the function of microtubules in the cytoskeleton?
What is the function of microtubules in the cytoskeleton?
Microtubules are hollow tubes composed of tubulin proteins. They are involved in cell motility, forming fibers during cell division, and intracellular transport.
What is the centrosome and its function in animal cells?
What is the centrosome and its function in animal cells?
The centrosome is a pair of centrioles located near the nucleus. It acts as the microtubule-organizing center (MTOC), playing a crucial role in cell division.
What is the function of peroxisomes and what enzyme do they contain?
What is the function of peroxisomes and what enzyme do they contain?
Peroxisomes are small, membrane-bound organelles that contain enzymes, particularly catalase. Catalase breaks down hydrogen peroxide (Hâ‚‚Oâ‚‚) into water and oxygen, detoxifying the cell from harmful reactive oxygen species.
What is the spindle apparatus and its role in cell division?
What is the spindle apparatus and its role in cell division?
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What are actin filaments and their function?
What are actin filaments and their function?
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Study Notes
Cell Biology - MCQ Study Notes
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Cytoskeleton Component for Cell Division: Microtubules are responsible for cell motility and forming fibers during cell division.
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Centrosome Function: The centrosome's primary function in animal cells is organizing microtubules.
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Flagellated Human Cell: Sperm cells are an example of a flagellated human cell.
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Hydrogen Peroxide Neutralization: Peroxisomes contain enzymes that neutralize hydrogen peroxide.
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Chromosome Separation: The spindle apparatus separates chromosomes during cell division.
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Actin Protein Cytoskeleton Component: Actin filaments are composed of actin protein.
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Centriole Structure: A centriole consists of nine triplets of microtubules.
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Respiratory Tract Cell Movement: Cilia move substances across the outer surface of cells in the respiratory tract.
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Transport Vesicle Synthesis: Transport vesicles are primarily synthesized by the rough endoplasmic reticulum.
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Mechanical Tension in Cells: Intermediate filaments bear mechanical tension within cells.
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