AP BIOLOGY

LABORATORY REVIEW

DIFFUSION AND OSMOSIS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which best describes how molecules move by osmosis?
A
Water molecules move from an area of high concentration to an area of low concentration.
B
Water molecules move from an area of lesser concentration to an area of greater concentration.
C
Water molecules move from a cooler area to a warmer area
D
Water molecules move randomly both into and out of an area, regardless of concentration
Explanation: 

Detailed explanation-1: -Diffusion is the movement of molecules from an area of high concentration of the molecules to an area with a lower concentration.

Detailed explanation-2: -In osmosis, water moves from areas of low concentration of solute to areas of high concentration of solute.

Detailed explanation-3: -If a semipermeable membrane (one that is permeable to water but not a solute) separates pure water from water in which solute is dissolved, water molecules will diffuse across the membrane into the region of higher solute concentration.

Detailed explanation-4: -Final answer: Osmosis is the movement of water molecules from a region of higher concentration to a region of lower concentration through a semipermeable membrane.

Detailed explanation-5: -Diffusion is defined as the net movement of molecules from an area of greater concentration to an area of lesser concentration.

There is 1 question to complete.