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Cell Biology: Centrioles and Centrosomes

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Cell Biology: Centrioles and Centrosomes

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Questions and Answers

What is the typical arrangement of centrioles in a cell?

Randomly distributed throughout the cytoplasm

In a linear array near the nuclear membrane

In pairs, usually located at right angles to each other near the nuclear membrane (correct)

In a circular pattern surrounding the nucleus

What is the function of centrosomes in cells?

To synthesize proteins

To regulate cell growth

To store genetic material

To organize and reorganize microtubules (correct)

What is the composition of a centriole?

Nine triplets of microtubules (correct)

Nine single microtubules

Nine doublets of microtubules

A complex of proteins and lipids

What is a characteristic of centrosomes in plants and fungi?

<p>They lack centrioles but still contain microtubule-organizing centres</p> Signup and view all the answers

What is the region around the centrioles called?

<p>Centrosome</p> Signup and view all the answers

Study Notes

Centrioles

Found in animal and most protist cells, occurring in pairs near the nuclear membrane
Each centriole consists of nine triplets of microtubules

Centrosome

Region surrounding the centrioles
Acts as a microtubule-organizing center, nucleating microtubule assembly
Responsible for reorganizing microtubules during cell division
Found in plants and fungi, but lacking centrioles, still containing microtubule-organizing centers

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Description

Learn about centrioles, barrel-shaped organelles found in animal and protist cells, and their role in microtubule organization and cell division. Discover the structure and function of centrosomes and their importance in cellular processes.