Study Guide for Campbell Biology
11th Edition
ISBN: 9780134443775
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece, Martha R. Taylor, Michael A. Pollock
Publisher: PEARSON
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Chapter 12, Problem 13TYK
Summary Introduction
Introduction: Cell division is a natural process in which a parent cell divides to produce two daughter cells. Cell cycle is divided into interphase and mitosis. Interphase is divided into gap1 (G1) phase, synthetic phase (S-phase), and gap 2 (G2) phase. Mitosis phase is divided into prophase, metaphase, anaphase, and telophase.
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What part of the cell cycles are checkpoints that regulate the transition from anaphase to telophase?
A.
M checkpoint
B.
G2 checkpoint
C.
G1 checkpoint
D.
S checkpoint
Which of the following statements about the cell cycle is TRUE?
a. The protein APC blocks cells from entering anaphase
b. CDKs are degraded after each cell cycle phase by the addition of a ubiquitin chain to the proteins
c. A kinase is a protein that adds a ubiquitin chain to other proteins Cyclin activity is necessary, but not always sufficient, for CDK activation
d. Cyclin proteins must be degraded before Cdk proteins can be activated
What happens during telophase?
A. Chromosomes are visible, nuclear envelope disappears, spindle fibers become visible
B. Sister chromatids are pulled apart, daughter cells begin to from
C. Chromosomes line up in the middle, microtubules attach themselves to chromosomes
D. Sister chromatids reach opposite ends of the cell, nucelar envelopes begin to form
Chapter 12 Solutions
Study Guide for Campbell Biology
Ch. 12 - a. How many chromosomes are in your somatic cells?...Ch. 12 - a. What event is common to all three subphases of...Ch. 12 - The following diagrams will depict the five stages...Ch. 12 - a. What is MPF? b. Describe the relative...Ch. 12 - In the following photomicrograph of onion root tip...Ch. 12 - Describe one chromosome as it proceeds through an...Ch. 12 - Draw a sketch of one half of a mitotic spindle....Ch. 12 - FILL IN THE BLANK: Identify the appropriate phase...Ch. 12 - FILL IN THE BLANK: Identify the appropriate phase...Ch. 12 - Prob. 3TYKF
Ch. 12 - Prob. 4TYKFCh. 12 - Prob. 5TYKFCh. 12 - Prob. 6TYKFCh. 12 - FILL IN THE BLANK: Identify the appropriate phase...Ch. 12 - Prob. 8TYKFCh. 12 - Prob. 9TYKFCh. 12 - FILL IN THE BLANK: Identify the appropriate phase...Ch. 12 - One of the differences between prokaryotic binary...Ch. 12 - Prob. 2TYKCh. 12 - Prob. 3TYKCh. 12 - Prob. 4TYKCh. 12 - Prob. 5TYKCh. 12 - In eukaryotic organisms, chromosomes are...Ch. 12 - Prob. 7TYKCh. 12 - Prob. 8TYKCh. 12 - Prob. 9TYKCh. 12 - Prob. 10TYKCh. 12 - During cell division, cyclin combines with...Ch. 12 - Prob. 12TYKCh. 12 - Prob. 13TYKCh. 12 - Prob. 14TYKCh. 12 - Vinblastine is a chemotherapeutic drug used to...
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- What is the function of the kinetochore during mitosis?a. It promotes the attachment of monads to each other toform a dyad.b. It is a location where a kinetochore microtubule can attachto a chromosome.c. It promotes the condensation of chromosomes duringprophase.d. Both a and b are correct.arrow_forwardHow does MPF trigger M phase of the cell cycle? A. MPF phosphorylates proteins that triggers the activation of M phase B. MPF has a regulatory role in breakdown of the nuclear envelope during M phase C. MPF is a dimer subunit that is turned on during S phase to aid with chromosome replication D. MPF Cdk subunits regulate M phasearrow_forwardUnpacking of chromosomes and the formation of a new nuclear envelope is a characteristic of which stage of mitosis? a. prometaphase b. metaphase c. anaphase d. telophasearrow_forward
- Which of the following statements is FALSE? A. Centrosomes are anchor points for microtubules and are essential to form the mitotic spindle. B. In the eukaryotic cell cycle the cell spends much more time in the interphase than in the mitotic phase. C. In telophase two nuclear envelopes are fully formed and the cell splits in two via cytokinesis. D. The contraction of the kinetochore microtubules leads to the separation of the sister chromatids during anaphase. E. In the prophase chromatin condenses into X-shaped chromosomes.arrow_forwardIn mitosis, chromosomes separate by which specific mechanism? A. chromosomes sprout flagella and begin to swim towards the ends of the cell B. molecular motors in the kinetochore move the chromosome toward the centrioles C. centrioles attract the chromosomes by electromagnetic attraction D. centrioles begin to shorten microtubules by degrading themarrow_forwardIf the M checkpoint is not cleared, what stage of mitosis will be blocked? a. prophase b. prometaphase c. metaphase d. anaphasearrow_forward
- Match the following events with the stages in mitosis: chromosomal materials condenses to form compact chromosomes. alignment of chromosomes along the equator or plate with microtubules attached to poles sister chromatids for each chromosome split and move to opposite poles chromosomes are clustered at each of the poles and give way to cytokinesis A. telophase B. anaphase C. metaphase D. prophasearrow_forwardThe diagram below shows a model for the normal regulation of the transition to anaphase during mitosis. 1. Signals are released by unattached kinetochores that cause MAD to bind CDC20. MAD CDC20 6. Chromatids separate as mitosis procoeds to anaphase. COHESIN 3. The APCCDC20 CDC20 complex ubiquinates Securin. APC 2. When all kinetochores are attached, MAD releases CDC20 which then combines with APC UBIQUITIN SEPARASE . Separase destroys Cohesin APC SEPARASE SECURIN 4. Securin is destroyed, releasing Separase Your analyses of cancer cells that do not regulate this transition normally indicate that: MAD is binding to CDC20; • Ubiquitin is not attached to securin; • Sister chromatids separate and move to opposite poles of the cell. Which of the following explanations could account for all of your observations? a. The cell has an alteration in MAD that prevents it from releasing CDC20 when the 'unattached kinetochore' signal stops. O b. More than one of the other answer choices are correct.…arrow_forwardAt what stage in mitosis do the sister chromatids line up along the midline of the cell? a. Metaphase b. Anaphase c. Telophase d. Prophasearrow_forward
- In a cell cycle Select one: a. DNA is replicated and passed to homologous chromosomes during interphase b. DNA is replicated and passed to daughter cells during mitotic phase c. DNA and RNA are replicated and passed to parent cells during interphase d. DNA and RNA are replicated and passed to sister chromatids during mitotic phasearrow_forwardWhat occurs during the prophase stage of mitosis? a.Chromosomes pack tightly and become attached to a newly forming spindle b.Chromosomes align midway between the spindle poles c.Chromosomes arrive at opposite spindle poles and become enclosed by a new nuclear envelope d.Sister chromatids separate and move toward opposite spindle polesarrow_forwardIdentify the type of cells undergoing cell division in phases 1 and 8 in the diagram above. Select one: a. Phase 1 Phase 8 Daughter cell Germ cell b. Phase 1 Phase 8 Somatic cell Daughter cell c. Phase 1 Phase 8 Germ cell Gamete d. Phase 1 Phase 8 Gamete Somatic cellarrow_forward
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