BIOLOGY-TEXT
5th Edition
ISBN: 9781260169621
Author: BROOKER
Publisher: MCG
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Chapter 16.1, Problem 3EQ
Summary Introduction
To describe: The differences between results with 2 hour exposed donor oocytes and 12 hour exposed donor oocytes.
Introduction: Yoshio Masui and Clement Markert studied the effect of progesterone on frog oocytes. Oocytes are the cells that on maturity turn into egg cells. Progesterone is the hormone produced by female frogs during mating season. These researchers considered progesterone as a signaling molecule that affects the functions as well as the amount of proteins which guides the advancement of frog oocytes from G2 to the initiation of the M phase
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2. In what stage were most of the onion root tip cells? Does this make sense?
4. What would happen if mitosis were uncontrolled?
3. As a cell grows, what happens to its surface area-to-volume ratio (hint: think of a balloon being
blown up)? How does this ratio change with respect to cell division?
5. How accurate were your time predictions for each stage of the cell cycle?
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6. Discuss one observation you found interesting while looking at the onion root tip cells.
Cell Cycle Division: Mitosis Beads Dia
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EXPERIMENT 2: FOLLOWING CHROMOSOMAL DNA MOVEMENT
THROUGH MITOSIS
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1, The cell cycle in a cell line is 30 hours, S phase takes 3.5 hours, mitosis takes 1
hour and G2 takes 12 hours. How long is Gi in this cell line? How long is interphase?
2. What would be likely to happen if you inhibited protein phosphorylation near the G2
-M checkpoint in a cell culture?
3. According to the figure below, chromosomes oscillate back and forth along the
microtubules after their attachment to the spindle. What is thought to cause this
oscillatory movement?
(a)
(b)
(c)
DO
DO
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Chapter 16 Solutions
BIOLOGY-TEXT
Ch. 16.1 - Researchers usually treat cells with drugs that...Ch. 16.1 - Which phases make up interphase?Ch. 16.1 - Prob. 1CSCh. 16.1 - Prob. 1EQCh. 16.1 - The Eukaryotic Cell Cycle CoreSKILL What...Ch. 16.1 - Prob. 3EQCh. 16.2 - Prob. 1CCCh. 16.2 - Mitotic Cell Division Concept Check: What are the...Ch. 16.3 - Core Skill: Modeling The goal of this modeling...Ch. 16.4 - Sexual Reproduction Concept Check: What is the...
Ch. 16.5 - Variation in Chromosome Structure and Number...Ch. 16 - Prob. 1TYCh. 16 - Prob. 2TYCh. 16 - Prob. 3TYCh. 16 - Prob. 4TYCh. 16 - Prob. 5TYCh. 16 - Which of the following is not an event of anaphase...Ch. 16 - Prob. 7TYCh. 16 - Which of the following statements accurately...Ch. 16 - Prob. 9TYCh. 16 - Aneuploidy may be the result of a. duplication of...Ch. 16 - Prob. 1CQCh. 16 - Prob. 2CQCh. 16 - Prob. 3CQCh. 16 - Prob. 1COQCh. 16 - A diploid eukaryotic cell has 10 chromosomes (5...
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- Question: How many chromosomes were present before mitosis? How many chromosomes did each of the daughter cells contain after mitosis? Cite an example of a type of cell that undergoes mitosis. Why is it important for each daughter cell to contain information identical to the parent cell? Human skin cells divide at a higher rate than neurons (nerve cells). Hypothesize why this may be. Hypothesize what would happen if the sister chromatids did not split equally during anaphase of mitosis.arrow_forwardSCS 20-21_SCI_BIO_CFA2 Brewer, Elise 10 of 24 6. A student observed onion cells in various stages of cell division. The results of two samples are shown in the table. Cell Division in Onions Stage of Second Sample First Total Number Cell Cycle Sample Interphase 44 45 89 Prophase 2 Metaphase 1 2 Anaphase 1 Telophase Total number of cells counted 100 Based upon the data, what can be correctly concluded? O Cell division in onion cells is highly regulated, with each cell dividing at the same time. O Onion cell division is slow compared to animal cells. O Onion cells spend more time in interphase than any other phase of the cell cycle. O Prophase is the longest phase of the cell cycle in onion cell division. P Type here to search f6 ts 文 esc 近 %24arrow_forwardWhich statements are true? Explain why or why not.1 Since there are about 1013 cells in an adult human,and about 1010 cells die and are replaced each day, webecome new people every three years.2 In order for proliferating cells to maintain a rela-tively constant size, the length of the cell cycle must matchthe time it takes for the cell to double in size.3 While other proteins come and go during thecell cycle, the proteins of the origin recognition complexremain bound to the DNA throughout.4 Chromosomes are positioned on the metaphaseplate by equal and opposite forces that pull them towardthe two poles of the spindle.5 Meiosis segregates the paternal homologs intosperm and the maternal homologs into eggs.6 If we could turn on telomerase activity in all ourcells, we could prevent aging.arrow_forward
- Objective: To review the phases of mitosis with the understanding that in a real tissue or a non-synchronized cell culture, different mitotic phases and cells in interphase will be observed at a certain time. Interphase is the period between mitotic events; all other phases are part of mitosis and their individual probabilities add up to the total probability of seeing cells undergoing mitosis. Pay attention to the individual probabilities for cells in each phase of the cell cycle. Problem N° 10 For a certain type of animal tissue, the probability of a randomly selected cell being in a particular stage of the interphase/mitosis cycle is given by the following table: Stage Probability Interphase 0.5 Prophase 0.1 Metaphase 0.05 Anaphase 0.2 Telophase 0.15 Suppose you examine 100 cells at random from this tissue. A) How many cells do you expect to see in metaphase? _____ cells B) You have selected a high magnification (2000 X) in your…arrow_forwardDefine Explain the role of CDK inhibitors. If cyclin-CDK com-plexes are necessary to allow regulated progression through the eukaryotic cell cycle, what would be the physiologicalrationale for CDK inhibitors?arrow_forwardNeed answer of 4,5,6. Shortly plz 4.If the most basic function of the cell cycle is to duplicate accurately the DNA in the chromosomes and then distribute the copies precisely to the daughter cells, why are there gaps between S phase and M phase? 5. Describe the molecular mechanism of a CDK activation. 6. What is the cyclin-CDK complex in the M phase of the cell cycle?arrow_forward
- Blackboard + > x U O O HELP CENTER Question 5 The p53 gene product (the protein made from this gene) is involved in: A the M checkpoint B) bringing cells out of GO c the length of time a cell spends in interphase D marking cells for programmed cell death Question 6 Which of the following is a reasonable estimate of the percentage of time spent in mitosis in a typical human cell 98% Scanned with CamScanner O HELP CENTER D marking cells for programmed cell death Question 6 Which of the following is a reasonable estimate of the percentage of time spent in mitosis in a typical human cell cycle? 98% B 50% 25% D 5% Question 7 If Hershey and Chase found only 355 in the bacterial cells, they would conclude that Scanned with CamScanner O HELP CENTER Question 7 If Hershey and Chase found only 3s in the bacterial cells, they would conclude that A RNA is the genetic material B) DNA and protein together serve as the genetic material C DNA is the genetic material D protein is the genetic materialarrow_forwardCell Cyle and Checkpoints Story Make a creative short story about the phases of cell cycle and its checkpoints. Highlight each function of the checkpoints and the characteristics of the cell during the different stages of the cycle.arrow_forwardrces co NOV 14 F2 # 3 Draw a linear regulatory pathway that describes this portion of the metaphase/anaphase transition pathway. Include anaphase, APC, cohesin, securin, and separase connected with activation/inhibition arrows as appropriate. ㅁㅁ 13 mitotic spindle active APC/C S4 cohesin complex 000 000 F4 inhibitory protein (securin) inactive proteolytic enzyme (separase) ci so active separase 54 metaphase O F5 1 6 165/20 attv /www Į .... A F6 MacBook Air UBIQUITYLATION AND DEGRADATION OF SECURIN & 7 cleaved and dissociated cohesins anaphase L F7 8 11 F8 ►►► 9 F9 0 FICarrow_forward
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cell division of meiosis and mitosis; Author: Stated Clearly;https://www.youtube.com/watch?v=A-mFPZLLbHI;License: Standard youtube license