Cell Biology: Mitosis Quiz

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Questions and Answers

What is the primary role of the mitotic spindle during prophase?

To dissolve the nuclear envelope
To align chromosomes at the metaphase plate
To separate chromatids to each new daughter cell (correct)
To condense chromatin into visible chromosomes

During which stage do the chromosomes appear maximally condensed?

Anaphase
Telophase
Metaphase (correct)
Prophase

What happens to the nucleolus and nuclear envelope during prophase?

They completely dissolve (correct)
They move to the equatorial plane
They begin to reform
They remain intact

What connects sister chromatids together during metaphase?

<p>Cohesin proteins (D)</p> Signup and view all the answers

What is the metaphase plate?

<p>The plane where chromosomes align midway between cell poles (C)</p> Signup and view all the answers

Flashcards

Prophase: Chromatin Condensation

Chromatin, the thread-like DNA, coils and thickens, becoming visible chromosomes under a microscope during the cell cycle.

Prophase: Nuclear Envelope Disappearance

The membrane surrounding the nucleus, disappears in this stage.

Prophase: Centrosome Movement

Two centrosomes, each containing centrioles, move to opposite poles of the cell.

Prophase: Spindle Formation

Microtubules assemble to form a dynamic network called the mitotic spindle (sometimes referred to as the spindle apparatus) that will help in separating the chromosomes and forming new cells.

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Metaphase: Chromosomes Alignment

Chromosomes line up at the center of the cell, forming a plane called the metaphase plate.

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Metaphase: Sister Chromatids Attachment

Sister chromatids, identical copies of the chromosome, remain attached by cohesin proteins.

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Metaphase: Chromosome Condensation

Chromosomes are at their most condensed form in this stage.

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Study Notes

Prophase

Chromatin condenses, forming visible chromosomes.
The nucleolus and nuclear envelope disappear.
Centrosomes move to opposite poles of the cell.
A mitotic spindle forms, with each spindle fiber responsible for separating chromatids to daughter cells.