Mid Term Review Essay Example for Free

Mid Term Review Essay1. For each pair of terms, explain the differences in their meanings. A. Diffusion, osmosis Diffusion is the functioning where molecules move from a region of higher(prenominal) concentration to a region of low concentration. Osmosis is basically the same, but with pissing. B. kiosk division, mitosis Cell division is part of mitosis, when a kiosk splits into two. Mitosis has more steps than beneficial cell division. C. facilitated diffusion, participating manoeuver Active transport is where a cell uses energy to move molecules. Facilitated diffusion is the same as diffusion, just when they pass by integral proteins. D. endocytosis, exocytosis Endocytosis is when useful nutrients are put into a cell. Exocytosis is when useful materials are removed from the cell.Multiple Choice2. Voltage sensitive channels help cells buy the farm byA. electrical signalsB chemical stimuliC. binding to moleculesD. insulin molecules3. Cells sense chemical signals by usi ngA. hormonesB. receptor proteinsC. signaling messengersD. surface markers4. The process by which water moves into and out of the cell is A. facilitated diffusionB. osmosisC. active transportD. diffusion5. A cell uses some of its energy to move molecules byA. osmotic pressureB. active transportC. diffusionD. osmosis6. The sodium-potassium pumpA. requires no energyB. moves potassium out of the cell.C. enables sugars to enter cells.D. works independently of channels.7. Which is an example of active transport?A. sodium-potassium pumpB. electron pumpC. endocytosisD. facilitated diffusion8. Particles too large to pass through protein channels in the cell membrane may enter the cell byA. exocytosisB. discriminating transportC. endocytosisD. osmotic pressure9. During mitosisA. chromosomes are copiedB. chromosomes move to opposite sides of the cellC. cytoplasm divides in halfD. a new cell wall forms in the center of the cell.10. If a cell has 8 chromosomes before cell division, how many ch romosomes will each of the two new cells have at the end of cell division?A. 16B. 8C. 4D. 3211. During cell division in bacteriaA. a circle of DNA is copiedB. chromosomes coil and moveC. the cell splits into 3 partsD. two new nuclei are formedCompletion12. After mitosis, the cytoplasm of cells is pinched in half. In cells of plants, cell walls are formed. 13. If set in water, a cell would swell and possibly burst due to osmotic pressure being too high. 14. A type of active transport system that uses light or chemical energy to move molecules that are required for cell metabolism is called the proton pump Short Answer15. What two assistive jobs are performed by the surface markers on cells? Cell markers tell your cells what type of cells they are and where they are to go, plus what type of cells they can join with. 16. Explain wherefore animal cells do not burst due to osmotic pressure. When the amount liquid in the animal cell rises, the difference between that pressure and the o smotic pressure decreases. When the pressure levels even out, the cell intake stops.17. Describe the events that result in the formation of two complete nuclei in a eukaryotic cell. This process is called mitosis and it has four phases, prophase, metaphase, anaphase, and telophase. First, the cell breaks down and bound together at one point. Next, the chromosomes separate into two. Then, the plasma membrane of the cell pinches the middle of the cell so the spotless cell can divide into two separate cells.