AP BIOLOGY

LABORATORY REVIEW

DIFFUSION AND OSMOSIS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following requires energy to transport molecules against a concentration gradient?
A
Osmosis
B
Diffusion
C
Facilitated Diffusion
D
Active Transport
Explanation: 

Detailed explanation-1: -Reason (R): Active transport uses energy to pump molecules against the concentration gradient.

Detailed explanation-2: -During active transport, substances move against the concentration gradient, from an area of low concentration to an area of high concentration. This process is “active” because it requires the use of energy (usually in the form of ATP). It is the opposite of passive transport.

Detailed explanation-3: -Active transport is a kind of cellular transport where substances move against a concentration gradient. This means that the direction is from an area of lower concentration to an area of higher concentration.

Detailed explanation-4: -Active transport mechanisms require the use of the cell’s energy, usually in the form of adenosine triphosphate (ATP).

Detailed explanation-5: -Final answer: Transport of molecules occurs against the concentration gradient by using energy in active transport process.

There is 1 question to complete.