Human Biology: Concepts and Current Issues (8th Edition)
8th Edition
ISBN: 9780134042435
Author: Michael D. Johnson
Publisher: PEARSON
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Chapter 17, Problem 9TY
Summary Introduction
Introduction:
In order for a cell to divide, it undergoes a cycle known as the cell cycle. It consists of Interphase and Mitosis. Interphase has three subphases: G1, S, and G2. To make sure the processes in the cell cycle are going as expected, the cell has its own mechanisms to check this progress. These are called cell cycle checkpoints. If any abnormal events have occurred, they are corrected or the cell cycle is halted. There are three major checkpoints and they occur during the following phases: G1, G2, and metaphase of mitosis.
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Sometimes a cells "deal with" damaged DNA by just killing off the cell. This special cellular suicide is called apoptosis. Usually, the cell cycle has checkpoints that prevent damaged/mutated cells from proceeding to the next phase, though. When these checkpoints don't work, apoptosis can be used. If apoptosis did NOT occur, how might the damaged DNA impact the rest of the cell cycle?
A. it may not complete the cell cycle correctly
B. new cells containing damaged DNA may be made
C. the cell may enter G0
D. all of the above are options
E. A and B, but not C
F. B and C, but not A
During what phase of the cell cycle is DNA synthesized?
IN which stage chromatin condenses into chromosomes?
Chapter 17 Solutions
Human Biology: Concepts and Current Issues (8th Edition)
Ch. 17 - How do you feel about the creation and then...Ch. 17 - How far should we go–to what lengths and at what...Ch. 17 - Describe how DNA is replicated before cell...Ch. 17 -
2. Compare and contrast the processes of...Ch. 17 - Explain what mutations are and the role of DNA...Ch. 17 - Name the four phases of mitosis and describe...Ch. 17 -
5. Explain why only one large egg is formed...Ch. 17 - Describe what is meant by selective gene...Ch. 17 - Explain how factors present in the environment can...Ch. 17 - Describe how ribosomes contribute to the formation...
Ch. 17 - Prob. 9CRCh. 17 - Prob. 10CRCh. 17 - What would be the outcome if a cell completed...Ch. 17 - Prob. 2TYCh. 17 - Prob. 3TYCh. 17 - Prob. 4TYCh. 17 - Which of the following are listed in order from...Ch. 17 - Prob. 6TYCh. 17 - Which is likely to be the shortest chain of...Ch. 17 - How many different amino acids could be encoded if...Ch. 17 - Prob. 9TYCh. 17 - Why do cells within an organism differentiate,...Ch. 17 - Which method of cloning is most similar to the way...Ch. 17 - Prob. 12TYCh. 17 - Prob. 13TYCh. 17 - Prob. 14TYCh. 17 -
15. How does the production of sperm differ from...Ch. 17 - Prob. 1AWKCh. 17 - Prob. 2AWKCh. 17 - Prob. 3AWKCh. 17 - Prob. 4AWKCh. 17 - Mitochondria contain their own DNA that is...Ch. 17 - Bacteria can reproduce by simple cell division....
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- 4) Describe in detail how p53 and MDM2 regulate cell division in a normal, healthy cell. You should describe 1) how these proteins cooperate to allow a cell to go through the cell cycle, 2) how they cooperate to stop the cell cycle, and 3) how they allow the cell cycle to continue again after having stopped it initially. You may use point form if you want.arrow_forwardDuring which stage of the cell cycle would a cell contain the least total amount of DNA?arrow_forwardIn multicellular organisms, nondividing cells stay in G0 phase. For the cell, why is it better to be held in G₁ rather than S, G₂ or M phase? A. G₁ cells are larger and more likely to perform the normal functions of the cell. B. G₁ cells have not replicated their DNA in preparation for division. C. G₁ cells are the only ones that do not have their chromatin in a highly condensed state. D. MPF is required to enter S phase, so the cell is committed to entering M phase if the cycle moves beyond G₁. How many does the chromosome number of the species A. Is equal to the diploid chromosome number. B. Refers to the chromosome number of the somatic cell. C. Is a constant number for the organisms of the species generation after generations. D. All of the above. Which statement about the daughter cells following mitosis and cytokinesis is correct? A. They are genetically different from each other and from the parent cell. B. They are genetically identical with each other and with the parent…arrow_forward
- Amount of DNA per nucleus over the cell division cycle. At which point in the accompanying figure does MPF reach its highest activity during the cell division cycle? a) I b) II c) III d) IVarrow_forward3) Examine the graph showing the relative percentage normal and cancer cells spend in various stages of the cell cycle. Based on the information in the graphs, infer how cancer cells differ from typical, noncancerous cells. Select ALL that apply. A) Cancer cells do not replicate their DNA. B) Cancer cells replicate their DNA too quickly. C) Cancer cells do not go through interphase during their cell cycle. D) Cancer cells spend more time dividing compared to typical cells. E) Cancer cells do not always grow to the same size as typical cells. more than 1 answer. not gradedarrow_forwardExamine 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 dividingarrow_forward
- What is the function of mitotic spindle?arrow_forwardQuestion 1) which cytoskeleton supports the cilia in moving mucous laden with foreign particles? Question 2) What will happen in a cell if the DNA ligase gene is mutated Question 3) Describe how is prophase mitosis different from prophase of meiosis I? Question 4) What happens to acetylcholine after it evoked activation of nicotinic acteylcholine receptors in the neuromusclar function?arrow_forward1) 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_forward
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