Cell Structure and Function Exam Questions And Answers

Cell Structure and Function Exam Questions And Answers Which type of cell structure is present in prokaryotic and eukaryotic cells? - (ANSWER) a cell membrane made of a lipid bilayer Which two types of structures are present in a plant cell, but not in an animal cell? - (ANSWER) chloroplasts and cell wall A model shows a molecule entering through a protein pump. Which type of cell transport is being modeled? - (ANSWER) active transport, because protein pumps are needed to move substances against a concentration difference Which of the following is a way that multicellular organisms can maintain homeostasis but unicellular organisms cannot? - (ANSWER) the cells of multicellular organisms can differentiate into specialized cells Cell 1 has DNA in the cytoplasm, does not have mitochondria, and has a cell wall. Cell 2 has DNA located in the nucleus, mitochondria is present, and does not have a cell wall. What conclusion about the cells does the data in the table support? - (ANSWER) cell 1 is prokaryotic; cell 2 is from an animal. According to the cell theory, what is the source of all new cells? - (ANSWER) pre-existing cells Which of the following structures occurs in cells of all types, including prokaryotic cells and eukaryotic cells? - (ANSWER) a cell membrane made of a lipid bilayer Nayla plans to study red blood cells in a liquid suspension, similar to blood plasma. To observe the greatest variety of osmotic activity, she should test the effect of which independent variables? - (ANSWER) salt concentration of the liquid that surrounds the red blood cells One plant receives sufficient water and has straight upright stems and firm leaves. One plant was grown is dry soil and has wilted stems and leaves. When the cells are examined under a microscope, which organelle will display the greatest difference between the two plants? - (ANSWER) the central vacuole, because it stores water and provides support Which is a property of all unicellular organisms, but not all multicellular organisms? - (ANSWER) cells can survive independently of one another There is a barrier which is permeable to water but not to sugar between two sides. In Side A there is a lower concentration of sugar molecules and in Side B there is a higher concentration of sugar molecules. What is likely to be observed? - (ANSWER) water molecules will move from Side A to Side B. the solution level on Side A will fall and the solution level on Side B will rise. types of passive transport - (ANSWER) diffusion, facilitated diffusion, osmosis types of active transport - (ANSWER) endocytosis and exocytosis Red blood cells were placed in a petri dish with pure water and they burst. What happened? - (ANSWER) The red blood cells were placed in a hypotonic solution. Water moved from the outside of the cells to the inside of the cells until the cells burst. The pancreas produces enzymes that aid in digestion. By what process are these digestive enzymes excreted from pancreas cells? - (ANSWER) the process of exocytosis The movement of matter across a cell membrane against a concentration difference is called ____ and it requires ____. - (ANSWER) active transport, energy What is the process by which a substance is taken up by a cell? - (ANSWER) the process of endocytosis