Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 4, Problem 20RQ
Which of the following do not play a role in intracellular movement?
- microfilaments and intermediate filaments
- microfilaments and microtubules
- intermediate filaments and microtubules
- only intermediate filaments
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Intermediate filaments are distinct from microtubules in all of the following EXCEPT:
intermediate filaments are more dynamic.
intermediate filaments do not have associated motor proteins.
intermediate filaments do not need ATP to assemble.
intermediate filaments are distinct from microtubules in all of these ways.
O intermediate filaments are not directional.
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What is not a similarity between motility of cilia/flagella and skeletal muscle?
Group of answer choices:
Both have cytoskeletal fibers arranged in a ring pattern
Both involve motor proteins connected to a cytoskeleton "track"
Both can produce movement
Both require ATP hydrolysis
There are 4 types of movement based on microtubules and microfilaments. List them, as well as two consequences if each of these movement systems failed. Which of these would you say would do the least damage, and why?
Chapter 4 Solutions
Biology 2e
Ch. 4 - Figure 4.7 Prokaryotic cells are much smaller than...Ch. 4 - Figure 4.8 If the nucleolus were not able to carry...Ch. 4 - Figure 4.18 If a peripheral membrane protein were...Ch. 4 - When viewing a specimen through a light...Ch. 4 - The is the basic unit of life organism cell tissue...Ch. 4 - Prokaryotes depend on to obtain some materials and...Ch. 4 - Bacteria that lack fimbriae are less likely to...Ch. 4 - Which of the following organisms is a prokaryote?...Ch. 4 - Which of the following is surrounded by two...Ch. 4 - Peroxisomes got their name because hydrogen...
Ch. 4 - In plant cells, the function of the lysosomes is...Ch. 4 - Which of the following is both in eukaryotic and...Ch. 4 - Tay-Sachs disease is a genetic disorder that...Ch. 4 - Which of the following is not a component of the...Ch. 4 - The process by which a cell engulfs a foreign...Ch. 4 - Which of the following is most likely to have the...Ch. 4 - Which of the following sequences correctly lists...Ch. 4 - Congenital disorders of glycosylation are a...Ch. 4 - Which of the following have the ability to...Ch. 4 - Which of the following do not play a role in...Ch. 4 - In humans, are used to move a cell within its...Ch. 4 - Which of the following are only in plant cells?...Ch. 4 - The key components of desmosomes are cadherins...Ch. 4 - Diseased animal cells may produce molecules that...Ch. 4 - In your everyday life, you have probably noticed...Ch. 4 - In what situation(s) would the use of a scanning...Ch. 4 - In what situation(s) would a transmission electron...Ch. 4 - What are the advantages and disadvantages of each...Ch. 4 - Explain how the formation of an adult human...Ch. 4 - Antibiotics are medicines that are used to fight...Ch. 4 - Explain why not all microbes are harmful.Ch. 4 - You already know that ribosomes are abundant in...Ch. 4 - What are the structural and functional...Ch. 4 - Why are plasma membranes arranged as a bilayer...Ch. 4 - In the context of cell biology, what do we mean by...Ch. 4 - In your opinion, is the nuclear membrane part of...Ch. 4 - What are the similarities and differences between...Ch. 4 - How do cilia and flagella differ?Ch. 4 - Describe how microfilaments and microtubules are...Ch. 4 - Compare and contrast the boundaries that plant,...Ch. 4 - How does the structure of a plasmodesma differ...Ch. 4 - Explain how the extracellular matrix functions.Ch. 4 - Pathogenic E. coil have recently been shown to...
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- Which of the following CORRECTLY describes a similarity when comparing actin filaments and microtubules? O Their motor proteins require ATP. O Their disassembly directly requires ATP. O Their assembly directly requires ATP. O Their assembly is faster at the plus end directly because of ATP.arrow_forwardWhich of the following describes an F-actin microfilament? A flexible, helical filament composed of two strands assembled from G-actin 13 protofilaments composed of heterodimers with a hollow core a flexible filament composed of 13 interwoven protofilaments Eight tetramers twisted into a rope-like filamentarrow_forwardWhich of the following is NOT a way intermediate filaments are unique compared to the other cytoskeletal filaments? intermediate filaments rely on accessory proteins for their function intermediate filaments can be found inside the nucleus intermediate filaments are made from fibrous protein subunits intermediate filaments do not have structural polarity O intermediate filaments do not interact with motor proteinsarrow_forward
- Which of the following most accurately describes tight junctions? They allow adjacent cells to share tensile stress by linking their intermediate filament cytoskeletons They allow adjacant cells to control the passage of molecules between them They bind actin filaments and assist cells to crawl They allow cells to directly exchange small molecules with adjacent cellsarrow_forwardWhich of the following are characteristics of both actin filaments and microtubules? Select all that apply They have structural polarity Their filaments undergo treadmilling Capping proteins affect length and stability of the filament The monomers bind ATP and spontaneously form polymersarrow_forwardAddition of which of the following would increase the rate of actin depolymerization on the minus end of the filament by dissociating ADP-actin? Othymosin-b4 O cofilin O ATP-G-actin O profilin O Cap Zarrow_forward
- A melanosome (type of vesicle containing the pigment melanin) is transported towards the nucleus of the cell. The hydrolysis of ATP is involved with this movement. Identify the most likely motor protein and cytoskeletal filament involved with this transport.arrow_forwardActin filaments and microtubules are similar with respect to each of the following EXCEPT: inherent polarity with plus and minus ends growth requires an organizing center association with motor proteins both are polymers of subunits regular remodelingarrow_forwardWhich of the following might be considered an exaptation? (Choose all that apply) Membrane phospholipids Integrins Pectin DNA as genetic material Cellular molecular signalsarrow_forward
- Thin and thick filament are organized into functional unit calledarrow_forwardWhat is the rate-limiting step in the formation of an actin filament? Addition of actin monomers to an existing filament None of the above Initiation, or nucleation Cross-linkingarrow_forwardWhich of the following is not a cellular activity associated with microtubules? maintenance of axons mititotic spindle cilial structure cell shape orientation of cellulose microfibrils All of the following are roles of microfilaments except cell migration. muscle cell contraction. mitotic spindle formation. cytoplasmic streaming. amoeboid movement.arrow_forward
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