Biol 1010 chpt 4 review test

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littlewhitewitch
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Biol 1010 chpt 4 review test
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2011-07-07 22:18:35
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Biol chpt review test
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Biol 1010 chpt 4 review test
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  1. Which of the following is not found in a prokaryotic cell?

    A. nucleoid
    B. plasma membrane
    C. mitochondrion
    D. ribosome
    E. cytoplasm
    C. mitochondrion.
    (this multiple choice question has been scrambled)
  2. Which of the fololowing can only be viewed with an electron microscope?

    A. virus
    B. human egg
    C. chlolplast
    D. bacteria
    A. virus
    (this multiple choice question has been scrambled)
  3. The plasma membrane has the consistency of

    A. water
    B. olive oil
    C. butter
    D. peanut butter
    B. olive oil
    (this multiple choice question has been scrambled)
  4. The plasma membrane is called a fluid mosaic because it contains

    A. a mosaic of phopholipids suspended within a protein bilayer
    B. waxes suspended within a mosaic of phopholipids.
    C. a mosaic of proteins suspended within a phopholipid bilayer
    D.a polysaccharide mosaic suspended within a protein bilayer
    C. a mosaic of proteins suspended within a phospholipid bilayer.
    (this multiple choice question has been scrambled)
  5. Eukaryotic cells compensate for a low surface-to-volume ratio by

    A. taking up materials from the environment more efficiently
    B. lowering their rate of metabolism
    C. reducing the number of activites in each cell.
    D. compartmentalizsing their activities into organelles
    D. compartmentalizing their activities into organelles
    (this multiple choice question has been scrambled)
  6. Ribosomal subunits are prduced in which organelle?

    A. endoplasmic reticulum
    B. cytoplasm
    C. nucleolus
    D. miochondria
    C. nucleolus
    (this multiple choice question has been scrambled)
  7. Assist with cell-to-cell communication
    A. transport proteins
    B. tight junction protein
    C. enzymatic proteins
    D. channel proteins
    E. cell recognition proteins
    F. receptor proteins
    D. channel proteins
    (this multiple choice question has been scrambled)
  8. Combine with molecules to carry them across plasma membranes

    A. tight junction protein
    B. channel proteins
    C. enzymatic proteins
    D. cell recognition proteins
    E. receptor proteins
    F. transport proteins
    F. transport proteins
    (this multiple choice question has been scrambled)
  9. Combine with signaling molecules

    A. tight junction protein
    B. transport proteins
    C. receptor proteins
    D. enzymatic proteins
    E. cell recognition proteins
    F. channel proteins
    C. receptor proteins
    (this multiple choice question has been scrambled)
  10. Participate in metabolic reactions

    A. cell recognition proteins
    B. receptor proteins
    C. channel proteins
    D. enzymatic proteins
    E. tight junction protein
    F. transport proteins
    D. enzymatic proteins
    (this multiple choice question has been scrambled)
  11. Match - Ribosome

    A. double membrane
    B. no membrane
    C. single membrane
    B. no membrane
    (this multiple choice question has been scrambled)
  12. match - Nucleus

    A. no membrane
    B. double membrane
    C. single membrane
    B. double membrane
    (this multiple choice question has been scrambled)
  13. match - Lysosome

    A. single membrane
    B. double membrane
    C. no membrane
    A. single membrane
    (this multiple choice question has been scrambled)
  14. match - mitochondrion

    A. single membrane
    B. double membrane
    C. no membrane
    B. double membrane
    (this multiple choice question has been scrambled)
  15. The organelle that sorts proteins and sends them to their final destinations is the

    A. vacuole
    B. ribosome
    C. lysosome.
    D. Golgi apparatus
    D. Golgi apparatus
    (this multiple choice question has been scrambled)
  16. Plant vacuoles may contain

    A. flower color pigments
    B. sugars
    C. toxins that protect plants against herbivorous animals
    D. all of these are correct
    D. all of these are correct
    (this multiple choice question has been scrambled)
  17. The interior of a mitochondrion is called the

    A. granum
    B. cristea
    C. matrix
    D. thylakoid
    C. matrix
    (this multiple choice question has been scrambled)
  18. Which of these structures is involved in protein synthesis?

    A. plasma membrane
    B. microtubules
    C. mitochondria
    D. ribosomes
    B. microtubles
    (this multiple choice question has been scrambled)
  19. Explain why a large surface-area-to-volume ration is needed for the proper functioning of cells.
    A cell needs a relatively large surface area for efficient absorption of nutrients and secretion of wastes.
  20. What is the major distinction between a prokaryotic cell and a eukaryotic cell?
    A prokaryotic cell lacks a membrane-bounded nucleus, while a eukaryotic cell has one.
  21. List the three types of bacterial appendatges. What do they have in common?
    The three bacterial appendages are 1. flagella, 2. fimbriae, and 3. comjugation pili

    They are all made of protein
  22. Why is the plasma membrane described as a fluid mosaic?
    The membrande is fluid because it has the consistency of oil; it is a mosaic because the many proteins form different patterns at various times in various membranes.
  23. List six type of proteins found in the plasma membrane.
    • Channel
    • Transport
    • Cell recognition
    • Receptor
    • Enzymatic
    • Junction proteins
  24. List the componets of the nucleus and give a function for each.
    • 1. nuclear envelope: defines the nucleus
    • 2. nuclear pore; allows substances to move into and out of nucleus
    • 3. nucleus; produces ribosomal subunits
    • 4. chromatin; becomes chromosomes and contains DNA, organized into genes.
  25. Where are ribosomal subunits produced, and where do ribosomes form in the cell?
    Ribosomal subunits are produced in the nucleolus and these subunits are assembled to form ribosomes in the cytoplasm. Many ribosomes are attached to the endoplasmic reticulum, and other occur freely within the cytoplasm.
  26. Contract rough endoplasmic reticulum with smooth endoplasmic reticulum.
    Rough ER contains ribosomes, while smooth ER does not. Rough ER synthesizes the polypeptides of proteins and modifies them, while smooth ER synthesizes lipids and detoxifies various chemicals, among other activites.
  27. Describe the function of the Golgi apparatus.
    The Golgi apparatus receives transport vesicles from the ER, modifies their contents if necessary, and repackages them in new transport vesicles that takes them to their destinations.
  28. Compare the structure and function of chloroplasts and mitochondria.
    Structure: the two main parts of a chloroplast are the thylakoids and the stroma; the two mains parts of the mitochondrion are the cristae and the matrix.

    Function: Chloroplasts capture energy from the sun to build carbohydrates. Mitochondria break down mainly carbohydsrates to release energy for ATP production.
  29. List the components of the cytoskeleton
    Microtubles, intermedfiate filaments, and actin filabments.
  30. What do motor proteins do?
    Motor proteins move vesicles and organelles from one location to another along microtubules or can create movement by interacting with actin filaments.
  31. Compare and contract the internal structure of centrioles with cilia and flagella
    Centrioles, cilia and flagella are all composed of microtubles arranged in a particular pattern and enclosed by the plasma membrane.

    In centrioles, the patern is 9 triplets with none in the center, while the arrangement of cilia and flagella is 9 doublets with two microtubules in the center.
  32. Contract the primary cell wqall with the secondary cell wall in plants
    All plant cells have a primary wall, which is capable of stretching during growth and is composed of cellulose and other compounds. The secondary cell wall has added strength and contains lignin in addition to cellulose.

    Lignin adds rigidity but also strength to the cell wall.
  33. Describe the composition of the extracellular matrix of an animal cell.
    The extracellular matrix notably contains the fibrous proteins collagen and elastin. It also contains polysaccharides.
  34. Compare adhesion junctions with tight junctions
    Adhesion junctions are flexible because intercellular filaments join cytoplasmic plaques.

    Tight junctions produce an impermeable barrier because plasma membrane proteins are joined to each other.
  35. Describe the functions of gap junctions.
    In gap junctions, plasma membrane proteins form channels that allow small molecules and ions to pass between two adjacent cells.

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