AP BIOLOGY

LABORATORY REVIEW

DIFFUSION AND OSMOSIS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Energy-requiring process that moves material across a cell membrane against a concentration difference
A
diffusion
B
osmosis
C
active transport
D
passive transport
Explanation: 

Detailed explanation-1: -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-2: -Active transport is the energy-requiring process of pumping molecules and ions across membranes against a concentration gradient. Active transport processes help maintain homeostasis.

Detailed explanation-3: -active transport. The energy needed for this transport to occur comes from the hydrolysis of ATP molecules. Active transport moves solutes against their concentration gradient (i.e. from low to high concentration) and also requires a protein to occur.

Detailed explanation-4: -Primary active transport directly uses a source of chemical energy (e.g., ATP) to move molecules across a membrane against their gradient.

Detailed explanation-5: -Active transport requires energy for the process by transporting molecules against a concentration or electrochemical gradient.

There is 1 question to complete.