Cell Cycle and Mitosis Overview

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Questions and Answers

What is the Metaphase Plate?

  • A structure formed during interphase
  • The division of the cytoplasm
  • The phase where chromosomes replicate
  • Created during metaphase when the chromosomes are midway between the poles (correct)

What occurs during G1 (gap 1)?

Metabolic activity and vigorous growth

What is Interphase?

The phase of the cell cycle where the cell prepares for division, including G1, S, and G2 phases.

What happens during the S (Synthetic) phase?

<p>DNA Replication</p> Signup and view all the answers

What is the purpose of G2 (gap 2)?

<p>Preparation for division</p> Signup and view all the answers

What does Mitotic Phase (M) encompass?

<p>Mitosis and Cytokinesis</p> Signup and view all the answers

What is Cytokinesis?

<p>Division of cytoplasm, pinched into two parts after mitosis ends</p> Signup and view all the answers

Describe the events occurring during Prophase.

<p>Chromatin condenses into chromosomes, nucleoli disappear, centriole pairs separate and the mitotic spindle is formed.</p> Signup and view all the answers

What occurs during Metaphase?

<p>Chromosomes come to the middle of the cell, their centromeres aligned at the exact equator of the cell.</p> Signup and view all the answers

What takes place in Anaphase?

<p>Centromeres of the chromosomes split, motor proteins pull chromosomes toward poles</p> Signup and view all the answers

What happens during Telophase?

<p>New sets of chromosomes extend into chromatin, new nuclear membrane is formed from Rough ER, nucleoli reappear</p> Signup and view all the answers

Define Mitosis.

<p>Nuclear division</p> Signup and view all the answers

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Study Notes

Cell Cycle and Mitosis Overview

  • Metaphase Plate: Formed during metaphase, where chromosomes are positioned midway between the cell poles.

Stages of the Cell Cycle

  • G1 (Gap 1): Characterized by intense metabolic activity and substantial growth.

  • Interphase: The phase where the cell prepares for division; encompasses G1, S, and G2 phases.

  • S (Synthetic): The stage in which DNA replication occurs to prepare for cell division.

  • G2 (Gap 2): Involves the preparation for mitosis; includes further growth and the final preparations for division.

  • Mitotic Phase (M): Comprises both mitosis and cytokinesis, resulting in cell division.

Mitosis Phases

  • Prophase: Chromatin condenses into visible chromosomes; nucleoli disappear; centrioles move apart; the mitotic spindle forms.

  • Metaphase: Chromosomes align at the cell's equatorial plane, centromeres are aligned precisely at the cell's equator.

  • Anaphase: Centromeres split, enabling motor proteins to pull chromosomes toward opposite poles of the cell.

  • Telophase: Chromosomes unravel back into chromatin; a new nuclear membrane forms from the Rough Endoplasmic Reticulum; nucleoli reappear.

Cytokinesis

  • Cytokinesis: The process occurring after mitosis where the cytoplasm divides, resulting in two separate daughter cells.

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