there is an uneven distibution of electrons between the oxygen and hydrogen atoms
100
what are the functions of each group of organic compounds
What are energy, storage, enzymes, genetic information
100
What happens to chemical bonds during chemical reactions?
always involve changes in the chemical bonds that join atoms in compounds
100
what is a substrate?
the reactants of enzyme-catalyzed reactions.
200
how are all of the isotopes of an element similar?
they have the same number of electrons, all isotopes of an element have the samae chemical properties.
200
what are acidic solutions?
acidic solutions contain higher concentrations of H+ ions than pure water and have pH values below 7.
200
what is polymerization?
What is a process of reacting monomer molecules together in a chemical reaction to form polymer chains or three-dimensional networks.
200
how do energy changes affect whether a chemical reaction will occur.
chemical reactions that release energy often occur spontaneously. chemical reactions that absorb energy will not occur without a source of energy.
200
what is activation energy?
energy that is needed to get a reaction started.
300
what are two main types of chemical bonds
What are covalent bonds and ionic bonds
300
what are basic solutions?
basic solutions contain lower concentrations of H+ ions than pure water and have pH values below7.
300
what do nucleic acids do?
store and transmit hereditary, or genetic, information
300
why are enzymes important to living things?
enzymes speed up chemical reactions that take place in cells
300
what are monosaccharides?
single sugar molecules
400
why do all isotopes of an element have the same chemical properties?
isotopes of an element have the same number of electrons as an atom of that element.
400
what does pH measure?
molar concentration of hydrogen ions in the solution and as such is a measure of the acidity or basicity of the solution.
400
name four groups of organic compounds found in living things
What are carbohydrates, lipids, nucleic acids, and proteins
400
what is activation energy?
What is the minimum quantity of energy that the reacting species must possess in order to undergo a specified reaction.
400
what are buffers?
weak acids or bases that can react with strong acids or bases to prevent sharp, sudden changes in pH.
500
how is a compound related to molecules?
Compounds relate to atoms, molecules, and elements, because atoms form the molecules and are also the smallest form of elements that can be grouped together to make chemical compounds.
500
what is the difference between a solutoin and a suspension?
Solutions are transparent, meaning that you can see through them. A suspension has bigger particle sizes and so it may look cloudy or murky.
500
what properties of carbon explain carbons ability to form many differrent macromolecules
it has four valence electrons, which means that it can bond with up to four other atoms.
500
how does an enzyme work?
biological molecules (proteins) that act as catalysts and help complex reactions occur everywhere in life
500
what is adhesion?
an attraction between molecules of different substances.