Life: The Science of Biology
11th Edition
ISBN: 9781319010164
Author: David E. Sadava, David M. Hillis, H. Craig Heller, Sally D. Hacker
Publisher: W. H. Freeman
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Chapter 11.1, Problem 2R
Summary Introduction
To review:
The reason as to why DNA (deoxyribonucleic acid) is segregated after replication before the cell undergoes division.
Introduction:
Most of the cells divide and form new cells. The division of the cell involves four major steps, which are initiation of division, replication of DNA, segregation of DNA, and cytokinesis. It is fast and simple in prokaryotic organisms, whereas it is a complex process in the eukaryotes.
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The cell cycle control system is a cycling set of molecules in the cell that triggers and coordinates key events in the cell cycle. This is all controlled by growth factors.
a) Identify the major checkpoints in a cell and its function. b)Explain the role of the growth factor.
1) what is meant by “there is no such thing as a typical cell?”
2) which part of the cell cycle does the cell spend the least amount of time in? Why do u think that is?
3) why would a cell ever want to destroy itself?
4) how long does a cell live before it undergoes mitosis?
5) if cells can constantly replace themselves, why is a heart attack (which kills cardiac muscle cells) so devastating?
6) what type of cells never undergo mitosis?
7) what makes stem cells particularly interesting to researchers?
8) how might stem cells be used to repair brain or heart damage, even though these cells do not undergo mitosis?
9) why do you think beauty experts would also be interested in stem cells?
10) what is the connection between cancer and mitosis?
11) why is it so difficult for your body to battle cancer?
12) why does you hair fall out of the chemotherapy?
Name the phases of the cell cycle. b) During which phases are the chromosomes and then the cytoplasm split, respectively? c) Describe one mechanism that is used to regulate the cell cycle.
Chapter 11 Solutions
Life: The Science of Biology
Ch. 11.1 - Prob. 1RCh. 11.1 - Prob. 2RCh. 11.1 - Prob. 3RCh. 11.2 - Prob. 1RCh. 11.2 - Prob. 2RCh. 11.2 - Prob. 3RCh. 11.2 - Prob. 4RCh. 11.3 - Prob. 1RCh. 11.3 - Prob. 2RCh. 11.3 - Prob. 3R
Ch. 11.3 - Prob. 4RCh. 11.3 - Prob. 5RCh. 11.4 - Prob. 1RCh. 11.4 - Prob. 2RCh. 11.4 - Prob. 3RCh. 11.4 - Prob. 4RCh. 11.5 - Prob. 1RCh. 11.5 - Prob. 2RCh. 11.5 - Prob. 3RCh. 11.5 - Prob. 4RCh. 11.6 - Prob. 1RCh. 11.6 - Prob. 2RCh. 11.6 - Prob. 3RCh. 11.7 - Prob. 1RCh. 11.7 - Prob. 2RCh. 11.7 - Prob. 3R
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- The interphase is the part of the eukaryotic cell cycle that is most transcriptionally active. Gene regulation during this phase involves changes in the chromatin. a) What is chromatin? b) How can the chromatin structure change?arrow_forwardThe longest phase of the cell cycle is: a) Cyclin b) Interphase Oc) Cytokinesis O d) Cancerarrow_forward6) What phase of the cell cycle would be altered, and what would change if you treated a cancer cell with a drug that a) interfered with DNA replication. b) stopped the spindle fibers from elongating.arrow_forward
- If a cell makes a mistake copying its DNA when getting ready to divide, at which checkpoint will the cell be stopped from dividing? A) G1 B) S C) G2 D) Marrow_forwardHow is genetic information carried from the nucleus to the cytoplasm?arrow_forwardWhich phase of the cell cycle is depicted in this diagram? a) S phase b) early prophase c) metaphase d) G1 phasearrow_forward
- 1) Examine the picture of an onion root tip with cells in various stages of the cell cycle. A student claims that interphase is the longest stage of the cell cycle. Another student claims that mitosis is the longest stage. Using evidence from the photo, determine which student is correct and why. A) Mitosis is the longest stage because anaphase requires more time to separate chromatids. B) Interphase is the longest stage because chromosomes are visible in the majority of the cells. C) Mitosis is the longest stage because the majority of the cells in the photo are replicating their DNA. D) Interphase is the longest stage because the majority of the cells in the photo have uncondensed chromatin and are not dividing. Not Gradedarrow_forwardWhat accounts for the different morphological and functional differences between cells that contain the exact same DNA in the nucleus?arrow_forwardwhy does s phase has least cell population？Isn‘t it true that s phase is for DNA replication？why not s phase has most amount of cell population？arrow_forward
- Is there any technique can quickly expand one set of cell chromosome?arrow_forwardIn the diagram, the speed bumps (look like short walls) represent __________. A) The only times at which genes may be actively expressed B) Points in time when the cell divides C) One-hour timepoints D) Checkpoints in the cell cycle .arrow_forwardThe cell division process that cells in culture undergo includes the following stages in temporal order: O a) Telophase, anaphase, prophase, metaphase O b) Anaphase, metaphase, prophase, telophase O c) Metaphase, prophase, telophase, anaphase O d) Prophase, metaphase, anaphase, telophasearrow_forward
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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