Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 16, Problem 3TY
Summary Introduction
Introduction: Checkpoints are the critical regulatory points found in the eukaryotic cell cycle. Checkpoint proteins are present at the checkpoints to determine the condition of the cell prior to cell division. These proteins delay the advancement of the cell cycle by the formation of active cyclin/cdk complexes.
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The metaphase to anaphase transition involves
a. new force being generated to pull the chromatids apart.
b. an increase in force on sister chromatids to pull them apart.
c. completing DNA replication of centromeres allowing chromosomes to be pulled apart.
d. loss of cohesion between sister chromatids.
In a healthy cell, which of the following proteins will be activated in order to suppress cell division if the cell is not ready or should not divide?
Select one:
a.
p53
b.
cdk
c.
cyclin
d.
seperase
e.
mitogen
DNA or deoxyribonucleic acid is the hereditary material in humans and almost all other organisms. Nearly every cell in a person's body has the same DNA. This, in turn, replicates in the non-dividing phase of the cell cycle which is
a. telophase
b. cytokinesis
c. metaphase
d. interphase
Chapter 16 Solutions
Biology
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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- Which of the following occurs during the G2 stage of interphase? a.The cell undergoes mitosis. b.The cell produces the proteins and cellular components needed for division. c.The cell undergoes DNA replication. d.The cell grows and produces molecules for DNA replication.arrow_forwardWhich of the following statements about mitosis is incorrect? a. Microtubules from the spindle poles attach to the kinetochores on the chromosomes. b. In anaphase, the spindle separates sister chromatids and pulls them apart. c. In metaphase, spindle microtubules align the chromosomes at the spindle midpoint. d. Cytokinesis describes the movement of chromosomes. e. Both the animal cell furrow and the plant cell plate form at their former spindle midpoint.arrow_forwardWhich of the following statements correctly identifies the difference between plant and animal cell division? Select one: a. The cell walls of plants prevent the process of cytokinesis. b. Plants cells lack centrioles, and they form a cell plate during cytokinesis. c. Both plant and animal cells undergo mitosis and cytokinesis, but they lack the interphase. d. Plant cells lack centromeres, and they form a cell wall to produce two daughter cells.arrow_forward
- In cancer, cells divide out of control. Thus, chemicals that interfere with cell division might be used to stop cancer cells. How many of the following might stop human cancer cells? I. A chemical that prevents the phosphorylation of lamins. II. A chemical that prevents microtubule shortening. III. A chemical that prevents actin-myosin contraction. IV. A chemical that prevents the dephosphorylation of lamins. O 2 O 4 O 1arrow_forwardDuring the cell cycle there are three checkpoints. Match each description with the correct checkpoint. Requires growth signals and checks there are no mutation in the DNA Checks that DNA is properly replicated and that all the organelles and proteins needed for division are present Ensures that all the chromosomes are lined up and accounted for A. G1/S B. S/G2 C. G2/M D. Metaphase/Anaphase E. Anaphase/Telophasearrow_forwardWhich of the following statements is true of the cell cycle? a The current model of the cell cycle is made up of two main stages. b The cell cycle is a sequential pattern of cell growth, DNA replication, and cell division that takes place in prokaryotic cells. c Knowledge of the cell cycle has remained the same over the last several decades. d The cell cycle is often modeled as a circular diagram, because it is a continuous cycle.arrow_forward
- The role of the APC to get past the metaphase/ anaphase checkpoint is... Select one: a. to initiate gene expression of proteins involved in DNA replication. b. Add phosphates to the MPF to cause intermediate filaments to break down, free DNA to move in the cell. c. to add phosphate to intermediate filaments causing them to reform into the nuclear envelope d. add ubiquitin to cohesins allowing the sister chromatids to splitarrow_forwardSometimes 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 Aarrow_forwardChromosomes are visible under microscope during cell division because a. Thickening of chromatins b. Disappearance of the nucleoli c. Disintegration of the nuclear membrane d. Duplication of the DNAarrow_forward
- Which of the following statements is true regarding cell cycle regulators? a. Cyclins determine which proteins each Cdks will act on. b. Cdks check the DNA for damage and repairs it. c. Cyclin binding to Cdks will result to Cdk inactivation. d. Cyclin levels remain constant through the cell cycle.arrow_forwardThe functions of centrioles include ...... a.serving as the site for ribosomal RNA synthesis b.producing ATP c.providing a whiplike beating motion to move substances along cell surfaces d.organizing the mitotic spindle in cell divisionarrow_forwardPassage of cells from G1 through R to S depends on the interaction of various signal molecules, proteins and enzymes which regulate the cell cycle. Imagine I have just induced a mutation in a cell line which prevents the breakdown of the cyclin molecule we discussed. Which of the following events do you predict will happen? circle all that apply Select one or more: a. Uncontrolled cell replication may result b. Retinoblastoma protein will be continuously active c. The cells will be stuck in G1 phase d. The cells will begin to replicate their DNA e. Cyclin dependent kinase (Cdk) will be continuously activearrow_forward
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