Homework Answers
1. Microtubules are associated with kinesin and dynein motor proteins. Kinesin proteins carry cargo and organelles like vesicles from cell to periphery. Dynein proteins are found in sliding microtubules which help in beating movements of cilia and flagella.
2. True
The movement along microtubules and assemble of different cytoskeletal elements require ATP-ADP and GTP-GDP.
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Which of the following associate with kinesin and dynein? O Microtubules O Microfilaments Intermediate filaments All...
Compare and Contrast all three cytoskeletal elements (microtubules, microfilaments, intermediate filaments).
Compare and Contrast all three cytoskeletal elements (microtubules, microfilaments, intermediate filaments).
of the three types of fibers; microfilaments (or and intermediate filaments are fibers with diameters in...
of the three types of fibers; microfilaments (or and intermediate filaments are fibers with diameters in a Microtubules are the filaments) are the middle range. Microtubules are hollow rods about 25 nm in diameter and 200 nm to 25 um in length. Microtubule fibers are constructed of the globular protein A tubulin dimer consists of two slightly different polypeptides: a-tubulin and B-tubulin. Microtubules shape and support the cell and serve as tracks to guide motor proteins carrving organelles to their...
For each of the following, decide whether it applies to actin filaments, intermediate filaments, and/or microtubules....
For each of the following, decide whether it applies to actin filaments, intermediate filaments, and/or microtubules. NOTE: there may be multiple answers for each statement. Found in the nucleus and cytoplasm ANSWER: Involved in the transport of vesicles and organelles ANSWER: Associate with proteins that help adhere cells to the extracellular matrix ANSWER: Their stability is influenced by nucleotide hydrolysis ANSWER: Directly involved in phagocytosis ANSWER: Can associate into bundles with the help of other proteins ANSWER:
What component of the cytoskeleton is associated with tight junctions? intermediate filaments O microfilaments microtubules Question...
What component of the cytoskeleton is associated with tight junctions? intermediate filaments O microfilaments microtubules Question 3 2 pts Epiethelial cells have which of the following on their basal surfaces? O adherens junctions hemidesmosomes O tight junctions O gap junctions desmosomes
Which cytoskeletal element is being described? Answer with the letter corresponding to the element: M. Microtubules...
Which cytoskeletal element is being described? Answer with the letter corresponding to the element: M. Microtubules A. Actin filaments IF. Intermediate filaments 1. Formation requires nucleation at a centrosome 1 2. Forms the contractile ring during cytoplasmic division (cytokinesis) 2 3. Found organized in a characteristic 9+2 arrangement in cilia and flagella 3 4. Examples include keratin and neurofilaments, which are important in the mechanical strength of skin and axons 4 5. Involved cellular crawling such as seen with white...
Question 1 1 pts Which of the following do not associate with motor proteins? O plasma...
Question 1 1 pts Which of the following do not associate with motor proteins? O plasma membrane O actin filaments O intermediate filaments O microtubules O vesicles
Question 78 Which of the following statements about the cytoskeleton is TRUE? All eukaryotic cells have...
Question 78 Which of the following statements about the cytoskeleton is TRUE? All eukaryotic cells have actin, microtubules, and intermediate filaments in their cytoplasm The cytoskeleton provides a rigid and unchangeable structure important for the shape of the cell. The three cytoskeletal filaments perform distinct tasks in the cell and act completely independently of one another Actin filaments and microtubules have an inherent polarity, with a plus end that grows more quickly than the minus end С. D Question 79...
Which of the following are characteristics of a typical kinesin motor? Select all that apply. moves...
Which of the following are characteristics of a typical kinesin motor? Select all that apply. moves towards the plus end moves towards the minus end binds GTP binds ATP binds to actin filaments binds to microtubules
1. Directional transport within the endomembrane system (anterograde vc. retrograde transport) is mediated by which of...
1. Directional transport within the endomembrane system (anterograde vc. retrograde transport) is mediated by which of the following. a. Kinesin and dynein motors on microtubules b. Myosin motors actin filaments c. Sliding of microtubules against each other using dynein motors. d. Desmosomal movement along intermediate filaments. 2. Dynamic assembly and disassembly of a cytoplasmic microtubule in a cell occurs primarily at the MT plus end, because the minus end is usually anchored to? a. a GTP-cap b. a centromere c....
Which of the following statements is false? Q 17-7 Homework Unanswered. Due in a day Which...
Which of the following statements is false?
Q 17-7 Homework Unanswered. Due in a day Which statement is FALSE? A Kinesins would be likely to move cargoes along microtubules toward the periphery of the cell o B A dynein would be the most likely motor protein to deliver a signal from the cell periphery to the nucleus O C Myosin I can control cell shape by pulling the plasma membrane along actin filaments D M yosin II promotes flagella movement...
of the three types of fibers; microfilaments (or and intermediate filaments are fibers with diameters in a Microtubules are the filaments) are the middle range. Microtubules are hollow rods about 25 nm in diameter and 200 nm to 25 um in length. Microtubule fibers are constructed of the globular protein A tubulin dimer consists of two slightly different polypeptides: a-tubulin and B-tubulin. Microtubules shape and support the cell and serve as tracks to guide motor proteins carrving organelles to their...
What component of the cytoskeleton is associated with tight junctions? intermediate filaments O microfilaments microtubules Question 3 2 pts Epiethelial cells have which of the following on their basal surfaces? O adherens junctions hemidesmosomes O tight junctions O gap junctions desmosomes
Which cytoskeletal element is being described? Answer with the letter corresponding to the element: M. Microtubules A. Actin filaments IF. Intermediate filaments 1. Formation requires nucleation at a centrosome 1 2. Forms the contractile ring during cytoplasmic division (cytokinesis) 2 3. Found organized in a characteristic 9+2 arrangement in cilia and flagella 3 4. Examples include keratin and neurofilaments, which are important in the mechanical strength of skin and axons 4 5. Involved cellular crawling such as seen with white...
Question 1 1 pts Which of the following do not associate with motor proteins? O plasma membrane O actin filaments O intermediate filaments O microtubules O vesicles
Question 78 Which of the following statements about the cytoskeleton is TRUE? All eukaryotic cells have actin, microtubules, and intermediate filaments in their cytoplasm The cytoskeleton provides a rigid and unchangeable structure important for the shape of the cell. The three cytoskeletal filaments perform distinct tasks in the cell and act completely independently of one another Actin filaments and microtubules have an inherent polarity, with a plus end that grows more quickly than the minus end С. D Question 79...
Which of the following statements is false?
Q 17-7 Homework Unanswered. Due in a day Which statement is FALSE? A Kinesins would be likely to move cargoes along microtubules toward the periphery of the cell o B A dynein would be the most likely motor protein to deliver a signal from the cell periphery to the nucleus O C Myosin I can control cell shape by pulling the plasma membrane along actin filaments D M yosin II promotes flagella movement...
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