Question

Which one of the following is not true about active transport?

• A. Requires energy
• B. Requires membrane proteins
• C. Downhill transport
• D. Highly selective

Answer 1

Answer:

C. Downhill transport

• Active Transport is defined as a process that involves the movement of molecules from a region of lower concentration to a region of higher concentration against a gradient or an obstacle with the use of external energy.

• Active transport requires a specialized carrier molecule, a protein, and the expenditure of cellular energy; transfer across membranes can therefore occur against a concentration gradient.