NEET BIOLOGY

CELL STRUCTURES AND FUNCTION

CELL ORGANELLE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which BEST describes the net movement of molecules in diffusion?
A
from an area of low concentration to an area of high concentration
B
from an area of high concentration to an area of low concentration
C
that it can not be observed
D
that it is dependent on living process
Explanation: 

Detailed explanation-1: -Facilitated diffusion can be defined as the passive movement of molecules across the cell membrane from a region of higher concentration to a region of lower concentration by means of a carrier molecule.

Detailed explanation-2: -Diffusion is the movement of molecules from an area of high concentration of the molecules to an area with a lower concentration. For cell transport, diffusion is the movement of small molecules across the cell membrane.

Detailed explanation-3: -Diffusion is the net movement of substances from an area of higher concentration to an area of lower concentration. This movement occurs as a result of the random and constant motion characteristic of all molecules, atoms, or ions (due to kinetic energy) and is independent from the motion of other molecules.

Detailed explanation-4: -Answer and Explanation: The movement of molecules from an area of higher concentration to an area of lower concentration is called diffusion. The net movement of molecules depends on a formed concentration gradient wherein one area has a higher concentration while another area has a lower concentration.

Detailed explanation-5: -Diffusion. Diffusion is a passive process of transport. A single substance tends to move from an area of high concentration to an area of low concentration until the concentration is equal across the space.

There is 1 question to complete.