#Question id: 2206
#Unit 2. Cellular Organization
The glucose uniporter GLUT1 has a Km of 1.5 mM for D-glucose and 30 mM for D-galactose. At a concentration of 5 mM for each, what is the rate of glucose transport relative to galactose transport? The Vmax may be assumed to be the same for both.
#Question id: 2207
#Unit 2. Cellular Organization
Why was it unexpected that transporter proteins are required for transmembrane fatty acid transport?
#Question id: 2208
#Unit 2. Cellular Organization
Which of the following statements is a reasonable explanation for why unsaturated fatty acids help keep a membrane more fluid at lower temperatures?
#Question id: 2210
#Unit 2. Cellular Organization
Which of these is a general feature of the lipid bilayer in all biological membranes?
#Question id: 2211
#Unit 2. Cellular Organization
Which of these statements about facilitated diffusion across a membrane is true?
#Question id: 2212
#Unit 2. Cellular Organization
Membrane lipids may
a. spontaneously flip-flop from one membrane leaflet to the other.
b. move laterally within one membrane leaflet.
c. aggregate with membrane proteins to form lipid rafts.
d. be unequally distributed in the two membrane leaflets.
e. be present in varying amounts in different cellular membranes