Which structure disappears first during prophase?
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Correct answer: Nucleolus
During prophase, the nucleolus is the first structure to disappear as rRNA synthesis ceases and the cell reorganizes for division. The nuclear envelope breaks down later, at the transition to prometaphase.
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More Mitosis: Stages and Significance questions
- Which stage of mitosis is characterized by the initiation of condensation of chromosomal material?
- The complete disintegration of the nuclear envelope marks the start of which phase of mitosis?
- Small disc-shaped structures at the surface of the centromeres are called:
- At which stage of mitosis are morphology and the number of chromosomes most easily studied under the microscope?
- The plane of alignment of the chromosomes at metaphase is referred to as the:
- Which phase is characterized by the splitting of centromeres and the separation of chromatids?