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- Which of these elements of the cytoskeleton is composed of tubulinand forms essential components of centrioles, spindle fibers, cilia,and flagella?a. actin filaments b. intermediate filaments c. microtubulesThe cytoskeleton includesa. microtubules made of actin filaments.b. microfilaments made of tubulin.c. intermediate filaments made of staggered protein tetramers.d. smooth endoplasmic reticulum.Which of the following is a feature common to all three components of the cytoskeleton? a. They all serve to scaffold the organelles within the cell. b. They are all characterized by roughly the same diameter. c. They are all polymers of protein subunits. d. They all help the cell resist compression and tension.
- The cytoskeleton of a cell consists of all of the following, excepta. microtubules.b. actin fi laments.c. extracellular matrix.d. intermediate fi laments.Which of the following is a component of the cytoskeleton? a. collagen b. dynein c. elastin d. chromatinWhich type of cytoskeletal element is characterized as a hollow, rigid cylindrical tube with walls composed of tubulin subunits? a) microfilamentsb) microtubulesc) intermediate filamentsd) all of these choicese) minitubules
- From the image, what is the normal function of the missing structure? A. A lipid bilayer controlling the movement of substances into and out of the cell B. A motor protein that "crawls" along microtubules to contract and release them, which provides movement C. A cytoskeleton element composed of tubulin subunits to provide structure for movement of the cellWhich of the following is not a function of cytoskeleton in a cell ? A) Maintenance of cell shape and structure B) Intracellular transport C) Cell motility D) Support of the organelleWhich of the following is NOT true about the peroxisome? It is _____. a. assembles from proteins b. a membrane-bound organelle c. responsible for packaging proteins d. similar to the lysosome
- "Without the cytoskeleton, the cell will not be able to perform any of its functions." Is there truth behind this claim? explainMatch each following organelle with its function: Select the INCORRECT match. a. Cytoskeleton/ Network of microtubulesand microfilaments b. RER/ Has sites for protein synthesis c. Nucleus/ Site of ribosome synthesis d. SER/ Contains enzymes for lipid synthesisWhich of the following is not a function of the smooth endoplasmic reticulum? Group of answer choices a.Provides a site for ribosome attachment b.Supplies membrane for use throughout the cell c.Makes steroid hormones d.Makes glycoproteins