CELL STRUCTURES AND FUNCTION
CELL DIVISION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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To cause cytokinesis via the concentric shortening of microtubules.
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They are required for DNA replication.
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They are the structure which hold the 2 daughter chromatids together at the centromere.
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They produce microtubules for the chromosomes to migrate along as they move to opposite poles of the cell.
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Detailed explanation-1: -Centrioles help to arrange the microtubules that move chromosomes during cell division to ensure each daughter cell receives the appropriate number of chromosomes. Centrioles are also important for the formation of cell structures known as cilia and flagella.
Detailed explanation-2: -Centrioles are paired barrel-shaped organelles located in the cytoplasm of animal cells near the nuclear envelope. Centrioles play a role in organizing microtubules that serve as the cell’s skeletal system. They help determine the locations of the nucleus and other organelles within the cell.
Detailed explanation-3: -Centrioles split and move to the opposite ends of the cell at the poles towards the end of Prophase. The moving of centrioles to the poles helps organize the spindle fibres that begin to play a role from the metaphase onwards.
Detailed explanation-4: -Prophase: During prophase, the nuclear envelope of the cell (which is where the 92 sister chromatids are contained) begins to break down. The centrioles, which are only present in animal cells, separate and each moves to an opposite end of the cell.
Detailed explanation-5: -During prophase, chromatin condenses into chromosomes, and the nuclear envelope, or membrane, breaks down. In animal cells, the centrioles near the nucleus begin to separate and move to opposite poles (sides) of the cell. As the centrioles move, a spindle starts to form between them.