What have studies of glucose transport in liposomes revealed?
a. Glucose is transported against a concentration gradient.
b. Glucose moves readily across the membrane by simple diffusion.
c. Glucose phosphates move readily across the membrane by simple diffusion.
d. The binding of glucose triggers a conformational change in the carrier protein.
e. The transport of solutes via carrier proteins is faster than via channel proteins.
d
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The substance H2O is considered to be
a. both a molecule and a compound. b. a compound but not a molecule. c. neither a molecule nor a compound. d. a molecule but not a compound. e. a chemical but not biological molecule.
Type II survivorship curves
a. are characteristic of humans and elephants. b. indicate a fairly constant rate of death at all ages. c. indicate a high mortality rate in the very young. d. are characteristic of species in which most individuals live a relatively long life and die of old age. e. are typical of species with high biotic potentials
The disinfecting properties of Lysol, a common household disinfectant, depend upon the presence of ________.
What will be an ideal response?
Decomposers recycle materials at __________
trophic level(s). a. the first b. the second c. the third d. the fourth e. any of these