Principles of Biology
2nd Edition
ISBN: 9781259875120
Author: Robert Brooker, Eric P. Widmaier Dr., Linda Graham Dr. Ph.D., Peter Stiling Dr. Ph.D.
Publisher: McGraw-Hill Education
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Chapter 4, Problem 4TY
Summary Introduction
Introduction:
Muscles are the connective tissues that are widely spread throughout the body and help to provide movement and flexibility to the body. The muscles are divided into cardiac, skeletal and visceral muscles.
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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
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.
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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Chapter 4 Solutions
Principles of Biology
Ch. 4.1 - With regard to the origin of life, why are...Ch. 4.1 - Prob. 2CCCh. 4.1 - Prob. 3CCCh. 4.1 - Prob. 1BCCh. 4.1 - Prob. 4CCCh. 4.1 - Prob. 1TYKCh. 4.1 - Prob. 2TYKCh. 4.1 - Prob. 3TYKCh. 4.2 - Prob. 1CCCh. 4.2 - Prob. 1TYK
Ch. 4.2 - Prob. 2CCCh. 4.2 - Prob. 2TYKCh. 4.3 - Prob. 1BCCh. 4.3 - Prob. 1CCCh. 4.3 - Prob. 2BCCh. 4.3 - Prob. 1TYKCh. 4.3 - Prob. 2TYKCh. 4.3 - Prob. 3TYKCh. 4.4 - Prob. 1BCCh. 4.4 - Prob. 1CCCh. 4.4 - Prob. 1TYKCh. 4.4 - Prob. 2BCCh. 4.4 - Prob. 2TYKCh. 4.4 - Prob. 3TYKCh. 4.5 - What is the function of the nuclear lamina and the...Ch. 4.5 - Prob. 1BCCh. 4.5 - Prob. 2CCCh. 4.5 - Prob. 1TYKCh. 4.5 - Prob. 2TYKCh. 4.5 - Prob. 3TYKCh. 4.6 - What is the advantage of having a highly...Ch. 4.6 - Prob. 1BCCh. 4.6 - Prob. 2CCCh. 4.6 - Prob. 1TYKCh. 4.6 - Prob. 2TYKCh. 4.7 - Prob. 1TYKCh. 4.8 - Prob. 1CCCh. 4.8 - Prob. 2CCCh. 4.8 - Prob. 3CCCh. 4.8 - Prob. 4CCCh. 4.8 - Prob. 1TYKCh. 4.8 - Prob. 2TYKCh. 4.8 - Prob. 3TYKCh. 4.9 - Which of the following could be found in a...Ch. 4.9 - Prob. 2TYKCh. 4 - The cell theory states that all living things are...Ch. 4 - Prob. 2TYCh. 4 - Prob. 3TYCh. 4 - Prob. 4TYCh. 4 - Prob. 5TYCh. 4 - Prob. 6TYCh. 4 - Prob. 7TYCh. 4 - Prob. 8TYCh. 4 - Prob. 9TYCh. 4 - Prob. 10TYCh. 4 - Describe two specific ways that protein-protein...Ch. 4 - Explain how motor proteins and cytoskeletal...Ch. 4 - A principle of biology is that structure...Ch. 4 - Prob. 1CBQCh. 4 - Prob. 2CBQ
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- 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?arrow_forwardA 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_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
- Which 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_forwardGive two examples of biological functions that are enabled by microfilaments or microtubules together with associated motor proteins.These could be whole cell functions or functions within the cell.arrow_forwardIf the graph represents one actin filament, and line A represents dynamic activity at the plus end and line B represents dynamic activity at the minus end, which of the following must be true? Group of answer choices Formin proteins have been removed. Treadmilling is occurring at 1000 mM. CapZ proteins are not present. Nucleation is occurring at 100 mM.arrow_forward
- Which of the following molecular motors is known to travel in an anterograde direction along microtubules? myosins kinesins myosins and dyneins dyneinsarrow_forwardYou are studying actin polymerization in the lab. You have Tube 1 with cell extract and ATP, and Tube 2 with cell extract and non- hydrolyzable ATP. Assuming both ATP and non-hydrolyzable ATP bind actin monomers with similar affinities, which of the following would observe in the two tubes? Select all that apply The average length of an actin filament in Tube 1 is longer than the average length of an actin filament in Tube 2 The average length of an actin filament in Tube 2 is longer than the average length of an actin filament in Tube 1 Polymerization of actin filaments is inhibited in presence of non-hydrolyzable АТР Depolymerization of actin filaments is inhibited in presence of non-hydrolyzable АТРarrow_forwardSelect the correct description explaining the assembly of intermediate filaments. O The process requires ATP binding to an intermediate filament protein - two dimers make a tetramer, then association of 8 tetramers form a filament. The process requires GTP binding to an intermediate filament protein-two dimers make a tetramer, then association of 8 tetramers form a filament. O No ATP/GTP binding to an intermediate filament protein required - two dimers make a tetramer, then association of 8 tetramers form a filament. Formation of a triple-helix, as seen in collagen, would be required for the assembly of intermediate filaments.arrow_forward
- Which 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_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_forwardIf a cell increases the activity of its actin severing proteins, will it lead in the short term to MORE or LESS actin polymer mass? Chose the most accurate answer. Increased severing activity will result in LESS polymer under any conditions. Increased severing activity will result in NO CHANGE in the total amount of polymer under any conditions. It simply results in a larger number of smaller filaments. Increased severing activity will result in MORE polymer under any conditions. If the concentration of free actin monomers is below the Cc for both the plus and minus ends, then MORE polymer will result. If the concentration of free actin monomers is above the Cc for both the plus and minus ends, then LESS polymer will result. If the concentration of free actin monomers is above the Cc for both the plus and minus ends, then MORE polymer will result. If the concentration of free actin monomers is below the Cc for both the plus and minus ends, then LESS polymer will result.arrow_forward
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