zation occurs predominantly at the minus (-) ends of microtubules. Polymerization is favored when tubulin is bound to GDP. Microtubules do not undergo polymerization or depolymerization until the cell receives a signal Tubulin is an enzyme.
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A:
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A: Microtubules are the component of the cytoskeleton that gives support to the cell. They participate…
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Q: Which of the following is NOT a component of the cytoskeleton? Microtubules intermediate filaments…
A: The cytoskeleton is the major characteristic of all eukaryotic cells which is a dynamic…
Which of the following statements is TRUE?
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Polymerization is favored when tubulin is bound to GDP. |
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Microtubules do not undergo polymerization or depolymerization until the cell receives a signal |
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Tubulin is an enzyme. |
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- Which of the following statements regarding microtubules is FALSE? Microtubules are typically arranged in cells such that thoir plus (+) ends are directed towards the plasma membrane and their minus (-) ends are attached to the centrosomes. Microtubules are composed of 13 protofilaments that are arranged into a hollow cylinder. Microtubules are polar. Microtubule-binding proteins, such as Tau, bind to microtubules to destabilizo thom. Microtubules are inherently unstable and rapidly disassemble with low/ GTIP concentrations.Which of the following statements applies to all three major classes of cytoskeletal polymers (microtubules, actin filaments and intermediate filaments)? They have intrinsic polarity They assemble from protein subunits synthesized on free polyribosomes They add subunits only at their ends They are involved in cell motility Their constituent proteins are tissue specificVesicles forming at the plasma membrane, or at the trans face of the Golgi, and destined only to fuse with endosomes and lysosomes, are generally not associated with which of the following proteins? dynamin proteins cargo receptor proteins clathrin proteins collagen proteins adaptin proteins
- Which of the following functions is NOT made possible by lysosomes? Group of answer choices breakdown of large molecules synthesize in lipids digest waste products protect the cell from foreign invadersWhich of the following changes to the microtubule binding protein, Tau, commonly occurs in Alzheimerâ s and other neurodegenerative diseases? A Tau is hypo-phosphorylated and does not bind to microtubules to destabilize them. B Tau levels are so low in the cell that they only bind to some microtubules. C Tau is hyper-phosphorylated and does not bind to microtubules to stabilize them. D Microtubules are hyper-phosphorylated and do not bind to Tau.Which of the following is not true about chromatin? 1- it contains highly packed DNA 2- present in the nucleus 3- contains only double standed DNA 4- organized structure of DNA and protein
- What cell types would be able to grow on the ECM in the following situations?a) Streptomycin was not added to the ECM.b) The ECM contains thiamine.c) The ECM contains all 20 amino acids and all 5 nitrogenous nucleic acid bases. Reminder: ECM = minimal medium + glucose + has streptomycin antibioticThe formation of polypeptide chains occurs within the _____ Question 5 options: microtubules. endoplasmic reticulum. nuclear filaments. Golgi bodies.Vesicles forming at the plasma membrane, or at the trans face of the Golgi, and destined only to fuse with endosomes and lysosomes, are generally associated with all of the following proteins except: dynamin proteins cargo receptor proteins clathrin proteins collagen proteins adaptin proteins
- Which of the following is the most compact level of chromatin structure? Metaphase chromosomes 30 nm fiber beads-on-a-string loops tethered to a protein scaffold All are equally compactwhich of the following process is referred as cell drinking? 1- endocytosis 2- phagocytosis 3- exocytosis 4- pinocytosiswhat subunits are microtubules composed of? a. actin b. amino acids c. tubulin d. glucose e. nucleotides