AP Bio Insta-Review Topic 1.1: Structure of Water & H Bonding

Front

What is the property of water that allows organisms to cool down through sweating?

Back

Evaporative Cooling: This property allows water to absorb heat from the body when it evaporates, helping to cool the organism.

Front

Where are hydrogen bonds found in nucleic acids?

Back

Between nitrogenous bases: Hydrogen bonds form between the nitrogenous bases of nucleotides, holding the two strands of DNA together.

Front

What property of water helps lake life survive during winter?

Back

Less dense as solid: Ice is less dense than liquid water, allowing it to float and insulate the water below, protecting aquatic life.

Front

What property of water is responsible for the movement of water up a plant stem?

Back

Adhesion and Cohesion: Cohesion allows water molecules to stick together, while adhesion helps them stick to the walls of the plant's xylem.

Front

What property of water is responsible for evaporative cooling?

Back

Specific heat: Water has a high specific heat, meaning it can absorb a lot of heat before it evaporates, which helps cool the surrounding area.

Front

Define cohesion in the context of water.

Back

Cohesion: The attraction between water molecules due to hydrogen bonding, which causes water to form droplets and contributes to surface tension.

Front

Define adhesion in the context of water.

Back

Adhesion: The attraction between water molecules and other substances, which allows water to climb up plant roots and stems.

Front

What is the significance of water's high specific heat?

Back

High specific heat: It allows water to moderate temperature changes in the environment, providing a stable habitat for aquatic organisms.

Front

Explain why ice floats on water.

Back

Ice floats on water because it is less dense than liquid water, which is due to the hydrogen bonds forming a crystalline structure in ice.

Front

What role does surface tension play in water?

Back

Surface tension: It allows small objects, like insects, to rest on the surface of water without sinking due to the cohesive forces between water molecules.