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A. movement of particles against the concentration gradient B. diffusion of water that requires the cell to expend its own energy C. diffusion of water across a selectively permeable membrane D. movement of any molecule with the concentration gradient = I got C 2 . What is always true of the process of active transport? A. Movement is with the concentration gradient. B. Movement is against the concentration gradient. C. It never requires the aid of a carrier protein. D. It moves materials from high concentration toward areas of lower concentration. = I got B 3 . Which of the following is true of facilitated diffusion? A. It requires a transport protein. B. It is active transport. C. It is the same as osmosis. D. It requires the cell to expend its own energy. = I got A 4 . Hormones produced in a cell can be expelled from the cell by what process? A. endocytosis B. passive transport C. diffusion through the plasma membrane D. exocytosis = I got D 5 . Which of the following describes a hypotonic solution? A. The concentration of solute outside a cell is lower than the concentration of solute inside of the cell. B. The concentration of solute outside a cell is higher than the concentration of solute inside of the cell. C. The solutions inside and outside of a cell have equal parts of both solute and water. D. none of the above = I got A 6 . What happens when a cell is placed into an isotonic solution:? A. More water enters the cell than leaves the cell. B. Less water enters the cell than leaves the cell. C. Equal amounts of water enter and leave the cell. D. There is no movement of water either in or out. = I got C 7 . Which of the following does not occur during prophase? A. Sister chromatids begin migrating to opposite poles. B. The nuclear membrane disappears. C. Chromosomes are visible. D. Centrioles migrate to opposite poles. = I got A 8 . What are chromosomes made from? A. both DNA and carbohydrates B. both RNA and nucleosomes C. both histones and lipids D. chromatin = I got D 9 . What factor does not limit cell size? A. surface area-to-volume ratio B. time needed for diffusion C. shape of the cell D. amount of DNA in the nucleus = I got D 10 . Which of the following occurs during interphase? A. growth of the cell and duplication of the genetic material B. the sister chromatids lining up at the equator of the cell C. cytokinesis D. disappearance of the nuclear membrane = I got A 11 . What is metastasis? A. an illness caused by a virus B. the spread of cancer cells C. a process that is not harmful D. a stage in the cell cycle = I got B 12 . Which of the following probably would not reduce the risk of cancer? A. exercise B. eating foods low in fat and high in fiber C. eating foods high in vitamins D. smoking = I got D 13 . What term describes groups of cell working together to perform one main task? A. organ systems B. tissues C. organs D. cytoplasm = I got B 14 . In animal cells, what structures form the spindle? A. nucleus B. chromosomes C. centrioles D. nuclear membrane = I got C 15 . What structure holds the sister chromatids together? A. centromere B. spindle C. nuclear membrane D. nucleosomes = I got A 16 . How is the process of cytokinesis different in plant cells than in animal cells? A. Plant cells form a cell plate. B. Animal cells form a cell plate. C. Vacuoles complete the process. D. The two new daughter cells aren't exactly alike. = I got A 17 . Chromosomes would not be visible during which part of the cell cycle? A. prophase B. telophase C. metaphase D. interphase = I got D 18 . Unicellular organisms ingest food by what process? A. exocytosis B. endocytosis C. mitosis D. cytokinesis = I got B 19 . What structures in the plasma membrane help transport materials in and out of the cell? A. carbohydrates B. cholesterol C. proteins D. centrioles = I got C 20 . What structure in plant cells makes them less likely to burst than animal cells when excess water enters the cell? A. chloroplasts B. plasma membranes C. mitochondria D. cell wall = I got D Please Login to Answer the Question LOGIN

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