11) The watery component of the cytoplasm is called A) cytosol. B) protoplasm. C) extracellular fluid. D) interstitial fluid. E) a colloidal gel. 12) Each of the following is an example of a nonmembranous organelle, except A) lysosomes. B) cilia. C) centrioles. D) ribosomes. E) cytoskeleton. 13) Components of the cytoskeleton may include all of the following, except A) microfilaments. B) intermediate filaments. C) microsomes. D) microtubules. E) thick filaments. 14) Which of the following about cytoplasm is false? A) extracellular fluid contains more protein B) the material that fills a cell C) semi-rigid texture D) includes cytoskeleton E) includes cytosol 15) Many proteins in the cytosol are ________ that accelerate metabolic reactions. A) carbohydrates B) enzymes C) lipids D) messengers E) ions 16) Microfilaments A) anchor the cytoskeleton to membrane proteins. B) control the consistency of cytoplasm. C) with myosin, produce cell movement. D) consist of the protein called actin. E) All of the answers are correct. 17) Microfilaments A) are usually composed of myosin. B) are hollow, filamentous structures. C) anchor the cytoskeleton to integral proteins of the cell membrane. D) interact with filaments composed of tubulin to produce muscle contractions. E) are found in the cytoplasm radiating away from the centrosome. 18) Tubulin is a A) carbohydrate that assembles into filamentous tubes (microtubules). B) lipid that assembles into filamentous tubes (microtubules). C) protein that assembles into filamentous tubes (microtubules). D) protein that forms the tubular portion of the cytosol. E) lipid that forms the ER. 19) Compared to the extracellular fluid, cytosol contains A) a higher concentration of potassium ions. B) a lower concentration of dissolved proteins. C) almost no glycogen. D) a higher concentration of amino acids. E) almost no lipids. 20) Which of the following cytoskeleton components moves the chromosomes during cell division? A) microfilaments B) intermediate filaments C) thick filaments D) microtubules E) basal bodies