Unit 1 Topics Review

Front

What are hydrogen bonds?

Back

Hydrogen bonds are attractions between the negative oxygen atom of one water molecule and the positive hydrogen atom of another water molecule.

Front

Why can small insects walk on water?

Back

Small insects can walk on water because they are light enough not to break the hydrogen bonds holding the water molecules together.

Front

What is hydrolysis?

Back

Hydrolysis is the process that breaks up polymers into monomers by adding water.

Front

What is dehydration synthesis?

Back

Dehydration synthesis is the process of removing water to form a bond between monomers.

Front

What is a phosphate group?

Back

A phosphate group is a functional group consisting of a phosphorus atom bonded to four oxygen atoms, important in energy transfer (e.g., ATP) and nucleic acids.

Front

Define covalent bonds.

Back

Covalent bonds are chemical bonds formed by the sharing of electrons between atoms.

Front

What are ionic bonds?

Back

Ionic bonds are chemical bonds formed through the transfer of electrons from one atom to another, resulting in the attraction between oppositely charged ions.

Front

Explain polar bonds.

Back

Polar bonds are covalent bonds where electrons are shared unequally, resulting in a molecule with a slight electrical dipole moment.

Front

What is surface tension?

Back

Surface tension is the cohesive force at the surface of a liquid that makes it behave like a stretched elastic membrane.

Front

What role do water molecules play in biological systems?

Back

Water molecules are essential for life, serving as a solvent, participating in chemical reactions, and helping to regulate temperature.