Biology as a subject is interesting to many students because it involves practical. However, the subject has a wide scope, and thus most questions tend to be troublesome to many learners. Get biology assignment help from us. The question below is commonly asked.
The force driving simple diffusion is _____, while the energy source for active transport is _____.
A) the concentration gradient; ATP
B) transmembrane pumps;
C) electron transport phosphorylated protein carriers; ATP
D) the concentration gradient; ADP
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