BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Textbook Question
Chapter 10, Problem 6A
In animal cells, cytokinesis is accomplished by a contractile ring containing actin. The related process in bacteria is
a. chromosome segregation, which also appears to use an actinlike protein.
b. septation via a ring of FtsZ protein, which is an actinlike protein.
c. cytokinesis, which requires formation of a cell plate via vesicular fusion.
d. septation via a ring of FtsZ protein, which is a tubulin-like protein.
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Which of the following are stages in the cytokinesis of animal cells? Select all that apply.
A) The cell plate expands along the plane of division, and when the plate fuses with the plasma membrane, the cytoplasm is partitioned into two new cells.
B)After telophase, the contractile ring constricts the plasma membrane and forms a cleavage furrow.
C)The contractile ring reaches its smallest diameter, and the spindle microtubules are cut as vesicles form the new membranes that separate the two new cells.
D)A contractile ring of microfilaments and motor proteins forms under the plasma membrane during anaphase.
Which of the following are stages in the cytokinesis of animal cells? Select all that apply.
A) The cell plate expands along the plane of division, and when the plate fuses with the plasma membrane, the cytoplasm is partitioned into two new cells.
B) After telophase, the contractile ring constricts the plasma membrane and forms a cleavage furrow.
C) The contractile ring reaches its smallest diameter, and the spindle microtubules are cut as vesicles form the new membranes that separate the two new cells.
D) A contractile ring of microfilaments and motor proteins forms under the plasma membrane during anaphase.Assessment question
Cytokinesis , or division of the cytoplasm to create two new daughter cells , occurs in conjunction with telophase . Examine the telophase micrographs of the onion root tip and whitefish blastodisc cells . How does cytokinesis look different for these two cells ? Explain why cytokinesis looks different between those cells
Chapter 10 Solutions
BIOLOGY
Ch. 10.1 - Prob. 1LOCh. 10.2 - Prob. 1LOCh. 10.2 - Distinguish between homologues and sister...Ch. 10.2 - Prob. 3LOCh. 10.3 - Describe the eukaryotic cell cycle.Ch. 10.4 - Prob. 1LOCh. 10.4 - Prob. 2LOCh. 10.5 - Describe the phases of mitosis.Ch. 10.5 - Explain the importance of metaphase.Ch. 10.5 - Compare cytokinesis in plants and animals.
Ch. 10.6 - Prob. 1LOCh. 10.6 - Prob. 2LOCh. 10.7 - Prob. 1LOCh. 10.7 - Prob. 2LOCh. 10 - Binary fission in prokaryotes does not require the...Ch. 10 - Chromatin is composed of a. RNA and protein. b....Ch. 10 - What is a nucleosome? a. A region in the cells...Ch. 10 - What is the role of cohesin proteins in cell...Ch. 10 - The kinetochore is a structure that functions to...Ch. 10 - Separation of the sister chromatids occurs during...Ch. 10 - Why is cytokinesis an important part of cell...Ch. 10 - What steps in the cell cycle represent...Ch. 10 - Cyclin-dependent kinases (Cdks) are regulated by...Ch. 10 - Prob. 2ACh. 10 - Genetically, proto-oncogenes act in a dominant...Ch. 10 - The metaphase to anaphase transition involves a....Ch. 10 - The main difference between bacterial cell...Ch. 10 - In animal cells, cytokinesis is accomplished by a...Ch. 10 - Regulation of the cell cycle is very complex and...Ch. 10 - Review you knowledge of signaling pathways...Ch. 10 - Compare and contrast how mutations in cellular...
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- You genetically engineered a cell to no longer contain the extracellular domain of an integrin. What is the most likely effect of losing this domain on the cell's ability to bind? A It would affect the cell's ability to attach to the ECM. B It would have no effect on the cell's ability to attach to anything. C It would affect the cell's ability to attach to the cytoskeleton through adaptor proteins. D It would affect both the cell's ability to attach to other cells and the cell's ability to attach to the cytoskeleton.arrow_forwardWhich 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_forwardWhich 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 activatedarrow_forward
- Describe the similarities and differences between the cytokinesis mechanisms found in animal cells vs those in plant cellsarrow_forwardIn addition to phagocytosis, neutrophils use a process called NETs. Which one of the following describes this process? A. NETs is a neutrophil process that activates the complement system of proteins, which destroys pathogens. B. NETs are chemicals secreted by neutrophils that trigger the rapid maturation of lymphoid stem cells into lymphocytes. C. A net-like structure of DNA, histones, lactoferrins, gelatinase, cathepsin G, and myeloperoxidase is secreted at pathogens. Together these chemicals destroy pathogens. D. NETs works when neutrophils secrete major basic proteins onto pathogens, destroying the pathogens' cell membranes.arrow_forwardWhich of the following is not true regarding cytokinesis?* A.Simultaneously happen with the telophase. B.It is the division of cytoplasm. C.The same with the interkinesis. D.Leads to the formation of cleavage furrow.arrow_forward
- Researchers have identified a mutation in the LMNA gene, which encodes some of the pro- teins in the nuclear envelope to be associated with the development of muscular dystrophy and other auto-immune diseases. Which of the following best describes a likely direct effect of a mutation of the LMNA gene? A It directly alters the production of ATP within the affected cells. B с D It directly alters the intake of nutrients in the affected cells. It directly alters the folding of proteins into their functional shape. It directly alters the synthesis of proteins from nucleic acid sequences within the af- fected cells.arrow_forwardWhich is true and which is false in the following statements: (regarding cytokinesis in animal cells) I Fusion of vesicles with the plasma membrane provides additional surface area required for daughter cells. II The contractile ring forms in the plane of the spindle pole body. III The centralspindlin complex recruits a RhoA-GEF to the cell cortex overlying the midbody. IV Local activation of formins contributes to assembly of the contractile ring.arrow_forwardIdentify which of the following statements is a lie? Select one: a. Apoptosis occurs as the body produces certain enzymes that initiate degradation of nuclear and cytoplasmic material, breaking the cell into necrosis bodies. b. Apoptosis helps maintain a healthy and normal population of cells. c. Apoptosis plays an essential role in growth, immune surveillance, and embryological development.arrow_forward
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