AP BIOLOGY

THE CELL

TRANSPORT INTO AND OUT OF THE CELL

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which one is the definition of active transport?
A
movement of particles through the cell membrane from a region of lower concentration to a region of higher concentration using energy in the form of ATP.
B
passage of water molecules from a region of their higher concentration to a region of their lower concentration through a partially permeable membrane
C
net movement of molecule from a region of higher concentration to region of lower concentration. Molecule down a concentration gradient
D
net movement of molecule from a region of lower concentration to region of higher concentration. Molecule down a concentration gradient
Explanation: 

Detailed explanation-1: -“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.”

Detailed explanation-2: -Active transport is the process of moving molecules across a cellular membrane through the use of cellular energy.

Detailed explanation-3: -The answer is A) A substance goes from an area of low concentration to an area of high concentration, and this requires energy. Active transport involves movement of substances across a membrane by a specialized protein.

Detailed explanation-4: -Active transport is defined as movement of a solute from a region of low electrochemical potential on one side of the cell membrane to a region of higher electrochemical potential on the opposite side.

Detailed explanation-5: -The movement of molecules from an area of higher concentration to an area of lower concentration is called diffusion.

There is 1 question to complete.