A bacterium produces a toxic metabolic by-product that it needs to efflux to the environment against the toxin's concentration g
radient. The energy to drive this efflux comes from the electrochemically favorable influx of protons. This is an example of Select one:
a. ABC transport.
b. antiport.
c. symport.
d. facilitated diffusion.
Animal cells each have a centrosome and lysosomes, whereas plant cells do not. Plant cells have a cell wall, chloroplasts and other specialized plastids, and a large central vacuole, whereas animal cells do not.
