The simultaneous movement of Na+ out of a cell against its concentration gradient and protons into a cell with their concentration gradient is best described as an example of
a. symport.
b. passive diffusion.
c. antiport.
d. facilitated diffusion.
e. active transport
C
You might also like to view...
What is the role of light in photosynthesis?
A. It excites electrons. B. It splits ATP molecules. C. It is the source of electrons. D. It fixes carbon into sugars.
Preliminary results from the HMP show association between the composition of the gut microbiome and which conditions?
a. Chrohn's disease b. Asthma c. Heart disease d. Diabetes e. Cancer
If the concentration of solutes in a cell is less than the concentration of solutes in the surrounding fluid,
then the extracellular fluid is said to be: a. hypertonic. b. hypotonic. c. isotonic. d. stable. e. amphipathic
Which of the following methods is NOT a method of viral penetration?
a. Injection b. Membrane fusion c. Endocytosis d. Exocytosis e. None of these are methods of penetration