Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Chapter 2 Terms
Chemistry of Life
| Question | Answer |
|---|---|
| element | one particular type of atom, and it cannot be broken down into a simpler substance by ordinary or chemical means |
| atom | the smallest basic unit of life |
| compound | a substance made of atoms of different elements bonded together in a certain ratio |
| ionic bond | forms through the electrical force between oppositely charged ions |
| covalent bond | forms when atoms share a pair of electrons |
| molecule | two or more atoms held together by covalent bonds |
| hydrogen bond | an attraction between a slightly positive hydrogen atom and a slightly negative atom, often oxygen or nitrogen |
| cohesion | the attraction among molecules of same substances |
| adhesion | the attraction among molecules of different substances |
| solution | a mixture of substances that is the same throughout- it is a homogeneous mixture |
| solvent | the substance that is present in the greater amount and that dissolves another solution |
| solute | a substance that dissolves in a solvent |
| acid | a compound that release a proton- a hydrogen atom- when it dissolves in water |
| bases | compounds that remove H+ ions from the solution |
| pH | measures the acidity of a solution's H+ ion concentration |
| monomer | each subunit in the complete molecule |
| polymer | a large molecule, or macromolecule, made of monomers bonded together |
| carbohydrates | molecules composed of carbon, hydrogen, and oxygen, and they include sugars and starches |
| lipids | nonpolar molecules that include fats, oils, and cholesterol |
| fatty acids | chains of carbon atoms bonded to hydrogen atoms |
| protein | a polymer made of monomers called amino acids |
| amino acids | molecules that contain carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur |
| nucleic acids | polymers that are made up of monomers called nucleotides` |
| chemical reactions | change substances into different substances by breaking and forming chemical bonds |
| reactants | the substances changes during a chemical reaction |
| products | the substances made by a chemical reaction |
| bond energy | the amount of energy that will break a bond between two atoms |
| equilibrium | reached when both the reactants and products are made at the same rate |
| activation energy | the amount of energy that needs to be absorbed for a chemical reaction to start |
| exothermic | a chemical reaction in which it releases more energy that is absorbs |
| endothermic | a chemical reaction in which it absorbs more energy than it releases |
| catalyst | a substance that decreases the activation energy needed to start a chemical reaction and, as a result, also increases the rate of the chemical reaction |
| enzymes | catalysts for chemical reactions in living things |
| substrates | the specific reactants that an enzyme acts on |
| ion | an atom that has gained or lost one or more electrons |
Created by:
harolds21
Popular Biology sets