Biology Chapter 2

Because of their partial positive and negative charges, polar molecules can ______ each other.

Carboxyl, amino, carbonyl, methyl, phosphate, hydroxyl, are _________ ________.

Adhesion is an attraction between molecules of different _________.

Because of hydrogen bonding, water is extremely ________.

Life is built on carbon. How many valence electrons does it have?

Activation energy is energy added to _______ reactions.

True or false - a chemical element is a pure substance that consists of entirely one element.

______ is the greatest solvent on Earth.

Catalysts reduce the amount of activation energy, and enzymes are biological ________.

The structure that results when atoms are joined together by covalent bonds is called a ______.

_______ function to transport substances in and out of cells and help fight diseases.

Like all molecules, a water molecule is _______.

Bond formation for a chemical bond involves the ______ that surround each atomic nucleus.

The two main types of chemical bonds are...

Polymers are large macromolecules that are made up of __________.

Isotopes are atoms of the same element that differ in the number of ______ they contain.

solutions with more H⁺ ions are _______.

The _______ is the substance in which the solute dissolves.

If isotopes are radioactive, it means...

A chemical compound is a substance formed by the chemical combination of ___ or more elements.

True or false: buffers are important for maintaining homeostasis.

The measurement system called the pH scale measures the concentration of H⁺ ions and ___ ions.

True or false - hydrogen bonds are stronger than covalent and ionic bonds.

Microenvironment and straining bonds are part of the acronym:

________ function as a main source of energy and for structural purposes.

_______ function to store energy and provide insulation.

The study of chemistry begins with the basic unit of matter, the _______.

True or false - the solute is the substance thatś dissolved.

True or false - in oxidation, reactants gain electrons, and in reduction, they lose electrons.

solutions with more OH^- ions are ______.

The organic compounds found in living things are...

__________ function to store and transmit hereditary or genetic information.

What are the four subatomic particles in an atom?

In H₂0, the oxygen end of a molecule is slightly ____, and the hydrogen end is slightly _____.