1
A) receptors B) cell surface markers C) spectrins D) transport proteins 2
A) cell surface markers B) transmembrane proteins C) interior protein network D) plasmodesmata 3
A) squeeze between phospholipid molecules B) pass through aquaporins C) be transported at the expense of ATP D) be moved by a cotransport system 4
A) expand B) become isotonic C) burst D) shrivel 5
A) more Na+ out than K+ in B) K+ out and Na+ in on a one-for-one basis C) Na+ out and K+ in on a one-for-one basis D) K+ and Na+ in the same direction 6
A) pass substances out of the cell in vesicles B) pass substances out of the cell through the membrane by osmosis C) release substances directly into the extracellular fluid through a pore D) release substances directly into the extracellular fluid through a pit E) identify substances in the environment 7
A) a phosphate group in place of one fatty acid B) phosphate groups in place of two fatty acids C) phosphate groups in place of three fatty acids D) a phosphate group in place of a carbon in glycerol E) none of the above 8
A) extrude bulk fluids from the cell B) allow desired molecules directly into the cytoplasm C) pass wastes in vesicles to the outside. D) pass information into adjacent cells E) bring desired substances from the environment into the cell in vesicles 9
A) permits water soluble molecules to pass through it B) facilitates the passage of water soluble molecules through it C) inhibits the passage of water soluble substances through it D) actively transports water soluble molecules through it E) is indifferent to the passage of water molecules through it 10
A) glycolipids B) phosphate groups C) glycoproteins D) ketoglutaric acids E) glycocarbohydrates 11
A) in a hypoosmotic solution from an isosmotic solution B) in an isosmotic solution from a hyperosmotic solution C) in a hyperosmotic solution from a hypoosmotic solution D) in a hypoosmotic solution from a hyperosmotic solution E) in one isosmotic solution from another isosmotic solution of the same composition 12
A) spectrin B) dextrin C) hemoglobin D) hemocyanin E) iron 13
A) sugar moves down its concentration gradient while sodium moves up its concentration gradient B) sodium moves outward against is concentration gradient while sugar moves inward down its concentration gradient C) sugar and sodium move inward down their concentration gradient D) sodium moves inward down its concentration gradient while sugar moves inward up its concentration gradient E) sodium and sugar move outward against their concentration gradient 14
A) polar amino acids B) hydrogen bonding amino acids C) nonpolar fatty acids D) nonpolar amino acids E) polar fatty acids 15
A) always fixed in position B) always abundant C) often not fixed in position D) never abundant E) none of the above 16
A) Na+ B) Cl- C) Ca++ D) ClO3 - E) H+ 17
A) double bonds between carbon atoms in the fatty acid tails B) steroid lipids at certain temperatures C) poor alignment of the fatty acids tails D) cholesterol at certain temperatures E) all of the above 18
A) engulfing a live organism B) acquiring a liquid C) engulfing a dead organism D) transporting bulk dissolved nutrients E) transporting bulk solid material 19
A) glycoproteins B) glycolipids C) glycocarbohydrates D) glycerol E) gluterates 20
A) two potassium ions in and two sodium ions out B) one sodium ion out and one potassium ion in C) three sodium ions out and two potassium ions in D) one potassium ion out and two sodium ions in E) three sodium ions in and two potassium ions out 21
A) All water soluble ions or molecules B) Certain water soluble molecules or ions C) All insoluble molecules or ions D) Certain insoluble ions or molecules E) Only the smallest molecules or ions 22
A) random motion stops B) water molecules and dissolved molecules are moving at the same rate C) the dissolved molecules or ions are equally distributed throughout the solution D) molecular motion stops E) there are the same number of water molecules as dissolved molecules 23
A) move passively through specific channels from an area of greater concentration to one of lower concentration B) are limited to solvents C) must have movements coupled to those of other substances D) may flow to a region of higher concentration by the expenditure of energy E) are restricted to only one direction through the membrane 24
A) their water repelling heads facing inward B) their water repelling tails facing inward C) their hydrogen bond forming heads facing inward D) their hydrogen bond forming tails facing inward E) no relationship to water 25
A) surface tension B) double bonds in their fatty acid tails C) the attraction of the phospholipid heads to each other D) hydrogen bonding with water E) the electrostatic attraction of phosphate groups for each other 26
A) True B) False 27
A) diffusion. B) endocytosis. C) phosphorylation. D) facilitated diffusion. E) osmosis. 28
A) Solution A is hyperosmotic to solution B. B) Solutions A and B are isosmotic. C) Solution B is hyperosmotic to solution A. D) Solutions A and B are isosmotic to the protozoan cell. E) Both a and b. 29
A) True B) False 30
A) exocytosis B) pinocytosis C) facilitated diffusion D) active transport E) phagocytosis 31
A) facilitated diffusion B) through gated channels in membrane proteins C) exocytosis D) active transport E) by any of the above processes 32
A) water molecules B) all molecules across a membrane C) molecules to areas of lower concentrations D) molecules to areas of higher concentrations E) molecules through a protein channel 33
A) of higher sodium concentrations inside the cell and higher potassium concentrations outside the cell B) of sodium and potassium but the area of their concentrations (inside or outside) depends on the needs of the cell C) of higher potassium concentrations inside the cell and higher sodium concentrations outside the cell D) of ATP inside the cell where it is needed E) by pumping sodium outside the cell and potassium is cotransported out as well 34
A) because ATP powers the pump that brings them in B) because they follow sodium ions into the cell which are traveling down their concentration gradients C) because they follow potassium in through the sodium-potassium pump D) through endocytosis E) sugar enters the cell by all of the processes listed above 35
A) osmosis B) diffusion C) phagocytosis D) exocytosis E) all of the above
2002 McGraw-Hill Higher Education