AP BIOLOGY

THE CELL

TRANSPORT INTO AND OUT OF THE CELL

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which term means “water-fearing”?
A
Adhesion
B
Polar
C
Hydrophilic
D
Hydrophobic
Explanation: 

Detailed explanation-1: -The word hydrophobic literally means “water-fearing", and it describes the segregation of water and nonpolar substances, which maximizes hydrogen bonding between molecules of water and minimizes the area of contact between water and nonpolar molecules.

Detailed explanation-2: -Meaning “ water fearing". Hydrophobic compounds do not dissolve easily in water, and are usually non-polar. Oils and other long hydrocarbons are hydrophobic.

Detailed explanation-3: -Hydrophobic and hydrophilic are opposites. The word stem ‘hydr’ comes from the greek ‘hydor’ meaning water, therefore hydrophobic materials are ‘water-fearing’, and do not mix with water, whereas hydrophilic materials are ‘water-loving’ and have a tendency to be wetted by water.

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