Which of the following choices is the process by which a substance is transported against a concentration gradient?

Question

Quizplus · Accepted Answer

Active transport is a mechanism for movement of substances,often against a concentration gradient,that uses the energy of the cell to actively pump the substance from one side of a membrane to the other.Passive transfer and filtration entail the passage of substances in a manner proportional to their concentration on each side of the membrane.The substances move without any assistance.Facilitated transport uses a carrier protein but cannot transport substances against a gradient.

Which of the Following Choices Is the Process by Which