Human Anatomy & Physiology (9th Edition)

Published by Pearson
ISBN 10: 0321743261
ISBN 13: 978-0-32174-326-8

Chapter 3 - Cells: The Living Units - Review Questions - Critical Thinking and Clinical Application Questions - Page 115: 4

Answer

The “G1 to S” stage is defined as the time between cell divisions, where the cells are at rest. However, G1 is the time when the cell is not dividing, but is still metabolically active. A cell will stay in this phase until it’s ready to divide, when it’ll move into the S/synthetic phase. In the synthetic phase, the DNA replicates itself in preparation for cell division. The length of G1 varies greatly in cells that have ceased to divide, ranging from several minutes or hours. In short terms, cells that do not move from G1 to S will not divide.

Work Step by Step

The “G1 to S” stage is defined as the time between cell divisions, where the cells are at rest. However, G1 is the time when the cell is not dividing, but is still metabolically active. A cell will stay in this phase until it’s ready to divide, when it’ll move into the S/synthetic phase. In the synthetic phase, the DNA replicates itself in preparation for cell division. The length of G1 varies greatly in cells that have ceased to divide, ranging from several minutes or hours. In short terms, cells that do not move from G1 to S will not divide.
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