chapter 5 quiz Flashcards
Which of the following is a characteristic feature of a carrier protein in a plasma membrane?
It exhibits a specificity for a particular type of molecule.
How do unsaturated fatty acids help keep any membrane more fluid at lower temperatures?
The double bonds form kinks in the fatty acid tails that prevent adjacent lipids from packing tightly together
Which of the following statements best explains why water can move quickly through the plasma membrane of certain cells?
It moves through aquaporin channel proteins.
Which of the following statements best describes a primary advantage of having multiple steps in a signal transduction pathway?
Having multiple steps provides for greater possible amplification of a signal.
Which of the following statements best describes what happens to a plant cell when it is submerged in distilled water?
The cell will become turgid.
Which of the following types of molecules would be expected to pass through a phospholipid bilayer most readily?
small hydrophobic
The sugars associated with glycoproteins and glycolipids of animal cell membranes
serve as markers that distinguish one cell from another.
Which of the following statements best describes what happens to a red blood cell when it is submerged in distilled water?
The cell will expand and burst.
Which of the following molecules comprise the primary structural components of the cell membrane?
phospholipids and proteins
Which of the following statements best describes a primary function of an electrogenic pump in cell membranes, such as the sodium-potassium pump?
generating the membrane potential
