AP Biology Flashcard: Water and Macromolecules

Front

Why does ice float on liquid water?

Back

In ice, water molecules form a crystalline structure with more space between them, making it less dense than liquid water.

Front

What type of bond is responsible for the attraction between two different water molecules?

Back

Hydrogen bond.

Front

What causes capillary action in water?

Back

Adhesion and Cohesion.

Front

Why is the Amino group (-NH2) classified as a Basic functional group?

Back

It is polar and can accept a proton (H+) from the surrounding solution.

Front

What property of water allows a water strider to walk on the surface of a pond?

Back

Cohesion.

Front

Define cohesion in the context of water.

Back

Cohesion is the strong attraction between water molecules due to hydrogen bonding.

Front

What is adhesion in relation to water?

Back

Adhesion is the attraction between water molecules and other substances.

Front

Explain the significance of water's high specific heat.

Back

Water's high specific heat allows it to absorb and release large amounts of heat with minimal temperature change, stabilizing climates.

Front

What is the role of hydrogen bonds in water's properties?

Back

Hydrogen bonds contribute to water's unique properties, including high surface tension, specific heat, and solvent capabilities.

Front

How does water's polarity affect its solvent properties?

Back

Water's polarity allows it to dissolve many ionic and polar substances, making it an excellent solvent.