Front

What allows small insects to walk on the surface of calm water without breaking it?

Back

The insects are light enough so that they do not break the hydrogen bonds holding the water molecules together.

Front

What are the structural differences between DNA and RNA?

Back

DNA is double-stranded, contains deoxyribose sugar, and uses thymine; RNA is single-stranded, contains ribose sugar, and uses uracil.

Front

Why does ice float on liquid water?

Back

Ice floats on liquid water because it is less dense than its liquid form.

Front

Are lipids polar macromolecules?

Back

No, lipids are nonpolar macromolecules.

Front

What macromolecule contains the elements C, H, O, N, and P?

Back

Nucleic acid.

Front

What is the primary function of nucleic acids in cells?

Back

Nucleic acids store and transmit genetic information.

Front

What is the difference between saturated and unsaturated fats?

Back

Saturated fats have no double bonds between carbon atoms, while unsaturated fats have one or more double bonds.

Front

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

Back

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

Front

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

Back

Water's high specific heat helps regulate temperature in organisms and environments.

Front

What are the building blocks of proteins?

Back

Amino acids are the building blocks of proteins.