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Transcript
Chapter 7 Name 1 Which structure is part of the cell’s skeleton? A B C D Golgi apparatus microfilaments plasma membrane mitochondria Date Class letter in the diagram below indicates 5 Which the structure that is most closely associated with protein building? A B An environmental toxin is discovered that 2 interferes with certain cellular functions. When affected cells are examined, it is observed that proteins that are normally found on the plasma membrane are instead found in the cytoplasm. Other proteins are also located improperly. Which structure is most likely affected by the toxin? A lysosomes B mitochondria C cell wall D Golgi apparatus C D A B C D A B C D 6 How is the plasma membrane of a cell organized? A one layer of phospholipids, through which do many scientists think that prokaryotes 3 Why are similar to the first organisms on Earth? Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. A B C D Prokaryote cells have a nucleus. The first organisms were all plantlike. Prokaryote cells have no nucleus. They have membrane-bound organelles. statement would not be included in a 4 Which summary of the cell theory? A The cell is the basic unit of organization. B All cells contain a nucleus that controls cell division. C All organisms are made up of at least one cell. proteins freely move B one layer of phospholipids, which are laid out end-to-end, with a hydrophobic tail touching a hydrophilic head C two layers of phospholipids, each of which has its hydrophilic side turned inward D two layers of phospholipids, with their polar hydrophilic heads facing away from each other 7 In which structure would you find a nucleus? A B C D bacterial cell plant cell prokaryote virus D All cells come from other, preexisting cells. is the process of maintaining a 8 Homeostasis cell’s environment. This includes the regulation of sodium ion (Na+) concentration within the cytoplasm. If too much Na+ is inside a cell, how can the concentration be changed? A More Na+ ions will enter the cell through the plasma membrane. B Excess Na+ ions will leave the cell via osmosis. C Excess Na+ ions will be transported out through membrane protein channels. D More Na+ ions will be transported in through membrane protein channels. STANDARDIZED TEST PRACTICE CHAPTER 7 13 Chapter 7 Name Date characteristic of the plasma membrane 9 isWhat illustrated in this drawing? Class diagram below represents a cell in water. bm The Explain why more water is moving out of the cell than into the cell. Outside the cell Oxygen Glucose Wastes Water Plasma membrane Water Wastes Water Inside the cell Carbon dioxide Water molecule Solute A B C D selective permeability phospholipid bilayer fluid mosaic construction impermeability to water A The concentration of solute in the cell is higher than it is outside the cell. B The concentration of water outside the cell is too great. C The concentration of solute outside the cell a large amount of energy to maintain their activity. What organelles provide this needed energy? A vacuoles B ribosomes C chloroplasts D mitochondria On a laboratory exam, a student is asked to bl determine if the cells under a microscope are plant cells or animal cells. What might the student look for? A chloroplasts and a cell wall B ribosomes and vacuoles C a nucleus and ribosomes D a cell membrane and mitochondria is higher than it is inside the cell. D The concentration of water inside the cell is greater than it is outside the cell. can the cytoskeleton of a cell be bn How described? A B C D framework and anchor for organelles selectively permeable series of membranes semifluid material transport system movement of substances through a cell bo Which membrane against a concentration gradient requires energy? A osmosis B diffusion C active transport D facilitated diffusion cell organelle contains coded directions bp Which for production of proteins? A B C D 14 CHAPTER 7 endoplasmic reticulum lysosome Golgi apparatus nucleus STANDARDIZED TEST PRACTICE Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. While viewing a slide of rapidly moving sperm bk cells, a student concludes that these cells require