During animal cell division, the spindle fibres are formed from:
Correct answer: B. Centrioles
- A. Mitochondria
- B. Centrioles
- C. Ribosomes
- D. Lysosomes
Explanation
At the beginning of the nuclear division, two wheel-shaped protein structures called centrioles position themselves at opposite ends of the cell forming cell poles. Long protein fibers called microtubules extend from the centrioles in all possible directions, forming what is called a spindle.
This question appeared on the UHS MDCAT 2014 paper, which you can sit online with every answer explained.
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About Cytoplasmic Organelles
Cytoplasmic organelles are the specialized structures suspended in cytoplasm, including mitochondria, ribosomes, endoplasmic reticulum, Golgi apparatus, lysosomes, vacuoles and centrosomes. Questions compare their structures and functions in animal and plant cells, including chloroplasts and the role of the endomembrane system in transport and secretion.
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