front 1 Large numbers of ribosomes are present in cells that specialize in producing which of the following molecules? | back 1 proteins |
front 2 Which structure is the site of the synthesis of proteins that may be exported from the cell? | back 2 rough ER |
front 3 What types of proteins are not synthesized in the rough ER? | back 3 mitochondrial proteins |
front 4 The Golgi apparatus has a polarity or sidedness to its structure and function. Which of the following statements correctly describes this polarity? | back 4 All of the above correctly describe polar characteristics of the Golgi function |
front 5 The liver is involved in detoxification of many poisons and drugs. Which of the following structures is primarily involved in this process and therefore abundant in liver cells? | back 5 smooth ER |
front 6 Motor proteins provide for molecular motion in cells by interacting with what types of cellular structures? | back 6 cytoskeletal structures |
front 7 Which of the following statements correctly describes some aspect of protein secretion from prokaryotic cells? | back 7 Proteins that are secreted by prokaryotes are synthesized on ribosomes that are bound to the cytoplasmic surface of the plasma membrane. |
front 8 When a potassium ion (K+) moves from the soil into the vacuole of a cell on the surface of a root, it must pass through several cellular structures. Which of the following correctly describes the order in which these structures will be encountered by the ion? | back 8 primary cell wall --> plasma membrane --> cytoplasm --> vacuole |
front 9 Hydrolytic enzymes must be segregated and packaged to prevent general destruction of cellular components. Which of the following organelles contains these hydrolytic enzymes in animal cells? | back 9 lysosome |
front 10 The smallest cell structure that would most likely be visible with a standard (not super-resolution) research-grade light microscope is | back 10 a mitochondrion. |
front 11 In the fractionation of homogenized cells using centrifugation, the primary factor that determines whether a specific cellular component ends up in the supernatant or the pellet is | back 11 he size and weight of the component. |
front 12 A cell with a predominance of free ribosomes is most likely | back 12 producing primarily cytoplasmic proteins. |
front 13 Which organelle or structure is absent in plant cells? | back 13 centrosomes |
front 14 Which type of organelle or structure is primarily involved in the synthesis of oils, phospholipids, and steroids? | back 14 smooth endoplasmic reticulum |
front 15 A primary objective of cell fractionation is to | back 15 separate the major organelles so that their particular functions can be determined. |
front 16 Which of the following makes it necessary for animal cells, although they have no cell walls, to have intercellular junctions? | back 16 Maintenance of tissue integrity and barriers to fluid leakage requires cells to adhere tightly to one another. |
front 17 A cell has the following molecules and structures: enzymes, DNA, ribosomes, plasma membrane, and mitochondria. It could be a cell from | back 17 nearly any eukaryotic organism. |
front 18 Cells require which of the following to form cilia or flagella? | back 18 centrosomes |
front 19 Which organelle often takes up much of the volume of a plant cell? | back 19 vacuole |
front 20 A mutation that disrupts the ability of an animal cell to add polysaccharide modifications to proteins would most likely cause defects in it | back 20 Golgi apparatus and extracellular matrix. |
front 21 All of the following are part of a prokaryotic cell except | back 21 an endoplasmic reticulum. |
front 22 The evolution of eukaryotic cells most likely involved | back 22 endosymbiosis of an aerobic bacterium in a larger host cell-the endosymbiont evolved into mitochondria. |
front 23 Thylakoids, DNA, and ribosomes are all components found in | back 23 chloroplasts. |
front 24 Ions can travel directly from the cytoplasm of one animal cell to the cytoplasm of an adjacent cell through | back 24 gap junctions. |
front 25 A newspaper ad for a local toy store indicates that a very inexpensive microscope available for a small child is able to magnify specimens nearly as much as the much more costly microscope available in your college lab. What is the primary reason for the price difference? | back 25 The toy microscope magnifies a good deal, but has low resolution and therefore poor quality images. |
front 26 In a plant cell, DNA may be found | back 26 in the nucleus, mitochondria, and chloroplasts. |
front 27 Which plant cell organelle contains its own DNA and ribosomes? | back 27 mitochondrion |
front 28 Which structure is common to plant and animal cells? | back 28 mitochondrion |
front 29 Which type of organelle is found in plant cells but not in animal cells? | back 29 plastids |
front 30 What is the most likely pathway taken by a newly synthesized protein that will be secreted by a cell? | back 30 ER →Golgi →vesicles that fuse with plasma membrane |
front 31 Which organelle is the primary site of ATP synthesis in eukaryotic cells? | back 31 mitochondrion |
front 32 Which animal cell organelle contains enzymes that transfer hydrogen from various substrates to oxygen? | back 32 peroxisome |
front 33 The cell walls of bacteria, fungi, and plant cells and the extracellular matrix of animal cells are all external to the plasma membrane. Which of the following is a characteristic common to all of these extracellular structures? | back 33 They are constructed of polymers that are synthesized in the cytoplasm and then transported out of the cell. |
front 34 Which of the following contains hydrolytic enzymes? | back 34 lysosome |
front 35 Movement of vesicles within the cell depends on what cellular structures? | back 35 microtubules and motor proteins |
front 36 All of the following serve an important role in determining or maintaining the structure of plant cells. Which of the following are distinct from the others in their composition? | back 36 plant cell walls |
front 37 Which of the following is present in a prokaryotic cell? | back 37 Ribosome |
front 38 ECM proteins are made by ribosomes in which part of a eukaryotic cell? | back 38 rough ER |