AP BIO CHAPTER 7 QUIZ

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cuz213022
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110773
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AP BIO CHAPTER 7 QUIZ
Updated:
2011-10-20 22:24:55
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BIO CHP
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BIO CHP 7
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  1. Which of the following types of molecules are the major structural components of the cell membrane?
    A. glycoproteins and cholesterol
    B. phospholipids and proteins
    C. proteins and cellulose
    D. nucleic acids and proteins
    E. phospholipids and cellulose
    B. phospholipids and proteins
    (this multiple choice question has been scrambled)
  2. According to the fluid mosaic model of cell membranes, which of the following is a true statement about membrane phospholipids
    A. they can move laterally along the plane of the membrane
    B. they are free to depart from the membrane and dissolve in the surrounding solution
    C. they frequently flip-flop from one side of the membrane to the other
    D. they have hydrophilic tails in the interior of the membrane
    E. they occur in an uninterrupted bilayer, with membrane proteins restricted to the surface of the membrane
    A. they can move laterally along the plane of the membrane
    (this multiple choice question has been scrambled)
  3. All of the following are functions of intergral membrane proteins- except
    A. enzyme synthesis
    B. cell adhesion
    C. active transport
    D. cytoskeleton attachment
    E. hormone reception
    A. enzyme synthesis
    (this multiple choice question has been scrambled)
  4. All of the following statements about membrane structure and functions are true -except
    A. both sides of a membrane are indentical in structure and function
    B. difffusion of gases is faster in air than across membranes
    C. special membrane proteins can cotransport two solutes by coupling diffusion with active transport
    D.voltage across the membrane depends on an unequal distribution of ions across the plasma membrane
    E. diffusion, osmosis, and facilitated diffusion do not require any energy input from the cell
    A. both sides of a membrane are indentical in structure and function
    (this multiple choice question has been scrambled)
  5. Of the following functions, the glyoproteins and glycolipids of animals cell membranes are most important for:
    A. the ability of cells to recognize like and different cells
    B. maintaining the integrity of a fluid mosaic membrane
    C. maintaining membrane fluidity at low temperatures
    D. facilitiated diffusion of molecules down their concentration gradients
    E. active transport of molecules against their mosaic membrane
    A. the ability of cells to recognize like and different cells
    (this multiple choice question has been scrambled)
  6. the kinds of molecules that pass through a cell membrane most easily are
    A. large and hydrophobic
    B. small and hydrophobic
    C. large polar molecules
    D. ionic
    E. monosaccgaraudes such as glucose
    B. small and hydrophobic
    (this multiple choice question has been scrambled)
  7. Which of the following is a characteristic feature of a carrier protein in a plasma membrane?
    A. it exhibits a specificity for a particular type of molecule
    B. it is a peripheral membrane protein
    C. it has few, if any, hydrophobic amino acids
    D. it requires energy to function
    E. it works against diffusion
    A. it exhibits a specificity for a particular type of molecule
    (this multiple choice question has been scrambled)
  8. which of the following would likely move through the lipid bilayer of a plasma membrane most rapidly?
    A. CO2
    B. starch
    C. K+
    D. an amino acid
    E. glucose
    A. CO2
    (this multiple choice question has been scrambled)
  9. Celery stalks that are immersed in fresh water for several hours become stiff and hard. Similar stalks left in a salt solution become limp and soft. From this we can deduce that the cells of the celery stalks are:
    A. hypotonic to fresh water by hypertonic to the salt soultion
    B. isotonic with fresh water but hypotonic to the salt solution
    C. hypotonic to both fresh water and the salt solution
    D. hypertonic to both fresh water and the salt solution
    E. hypertonic to fresh water but hypotonic to the salt solution
    E. hypertonic to fresh water but hypotonic to the salt solution
    (this multiple choice question has been scrambled)
  10. All of the following cellular activities require ATP energy - except -
    A. movement of O2 into the cell
    B. exocytosis
    C. protein synthesis
    D. cytoplasmic streaming
    E. Na+ ions moving out of the cell
    A. movement of O2 into the cell
    (this multiple choice question has been scrambled)
  11. the movement of a substance across a biological membrane against its concentration gradient with the help of energy input is which of the following?
    A. osmosis
    B. facilitated diffusion
    C. diffusion
    D. active transport
    E. exocytosis
    D. active transport
    (this multiple choice question has been scrambled)
  12. Water passes quickly through cell membranes because
    A. it is a small, polar, charged molecule
    B. the bilayer is hydrophilic
    C. it moves through hydrophobic channels
    D. water movement is tied to ATP hydrolysis
    E. it moves through aquaporins in the membrane
    E. it moves through aquaporins in the membrane
    (this multiple choice question has been scrambled)
  13. Which of the following characterizes the sodium-potassium pump?
    A. a carrier protein undergoes conformational change.
    B. A and B
    C. sodium ions are pumped out of a cell against their gradient
    D. A, B and C
    E. potassium ions are pumped into a cell against their gradient
    D. A, B and C
    (this multiple choice question has been scrambled)
  14. An organism with a cell wall would have the most difficulty doing which process?
    A. exocytosis
    B. osmosis
    C. active transport
    D. diffusion
    E. phagocytosis
    E. phagocytosis
    (this multiple choice question has been scrambled)
  15. A patient has had a serious accident and lost a lot of blood. In an attempt to replenish body fluids, a large amount of distilled water was transferred directly into one of the veins. What will be the most probable result of this transfusion?
    A. it will have no serious effect because the kidneys would quickly eliminate the excess water
    B. it will have serious, perhaps fatal, consequences because the red blood cells will be hypertonic relative to the body fluids and the cells will burst.
    C. it will have serious, perhaps fatal, consequences because the red blood cells will be hyoptonic relative to the body fluids and the cells will shrivel
    D. it will have no unfavorable effect as long as the water is free of viruses and bacteria
    E. it will have serious, perhaps fatal, consequences because there will be too much fluid for the heart to pump
    B. it will have serious, perhaps fatal, consequences because the red blood cells will be hypertonic relative to the body fluids and the cells will burst.
    (this multiple choice question has been scrambled)

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