Campbell Biology in Focus
Campbell Biology in Focus
3rd Edition
ISBN: 9780134710679
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Rebecca Orr
Publisher: PEARSON
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Chapter 9, Problem 4TYU
Summary Introduction

The cell cycle is an essential process by which cells increase in number while maintaining genetic stability. In an organism, cell cycle is vital for growth and regeneration. However, it has to be tightly regulated to avoid dire consequences. In cell cycle, a mother cell is divided into two identical daughter cells and this process is mainly divided into three phases, namely interphase (G1, S, and G2), mitosis (prophase, metaphase, anaphase and telophase), and cytokinesis. Cell cycle checkpoints regulate each stage in the process of the cell cycle.

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a) Draw a DNA replication fork and label the polarity of your DNA (you decide which strand is 3’à5’ and 5’à3) and label the leading and lagging strand. Depict the helicase, topoisomerase, and SSBPs doing their jobs in early DNA replication as well as a primase on each strand laying down an RNA primer.   b) Describe the main jobs of each of the following enzymes in the coli model of replication: DNA Polymerase I  2. DNA Polymerase II    3. DNA Polymerase III
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The Cell Cycle and its Regulation; Author: Professor Dave Explains;https://www.youtube.com/watch?v=eqJqhA8HSJ0;License: Standard YouTube License, CC-BY
Cell Division - Mitosis and Meiosis - GCSE Biology (9-1); Author: Mr Exham Biology;https://www.youtube.com/watch?v=w7vp_uRA8kw;License: Standard YouTube License, CC-BY