Humber Admissions Practice Test

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Prepare for the Humber Admissions Test with comprehensive quizzes. Test your knowledge with multiple choice questions and insightful explanations. Boost your confidence and readiness for exam day!

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What structure forms during prophase?

Cell plate
Spindle fibers
Nuclear envelope
Chromatin

The correct answer is: Spindle fibers

During prophase, spindle fibers are formed, which are crucial components of the cell's mitotic apparatus. These fibers are produced by the centrosomes, which migrate to opposite poles of the cell. Spindle fibers, consisting of microtubules, play an essential role in ensuring that chromosomes are properly segregated during cell division. The formation of spindle fibers marks the transition from interphase to mitosis, as they begin to interact with the chromosomes that are condensing and becoming visible. This structural change is necessary for the chromosomes to align and separate accurately during the later stages of mitosis, specifically during metaphase and anaphase. Understanding this process is critical, as it highlights the dynamic changes that cells undergo during division and emphasizes the importance of spindle fibers in maintaining genetic integrity across daughter cells.