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Biology Chapter 2

High School Biology Chapter 2

TermDefinition
Atom Smallest unit of matter that cannot be broken down
Element pure substance with only one kind of atom
Compound joined atoms that are two or more different substances
Molecule a group of atoms held together by covalent bonds
Ion an atom that has gained or lost one or more electrons
Cohesion attraction between substances of the same kind
Adhesion attraction between different substances
Solution mixture with one or more substances evenly distributed in another substance
Acids compounds that form hydrogen ions when dissolved in water (have a pH from 0-7)
Bases compounds that reduce the concentration of the hydrogen ions (have a pH from 8-14)
Carbohydrates organic compounds made of carbon, hydrogen, and oxygen
Monosaccharides single sugars
Lipids non-polar molecules that are not soluble
Protein large molecule formed by smaller molecules
Amino Acids building blocks of proteins
Nucleic Acids long chain of nucleotides
Nucleotide made of sugar a base and a phophate
DNA two strands of nucleotides that swirl together
RNA one strand of nucleotide
ATP single nucleotide
Energy the ability to move or change matter
Activation Energy the energy to start a chemical reaction
Enzymes increase the speed of chemical reactions
Substrate a substance where the enzyme acts during a chemical reaction
Active Sites a fold in enzymes
Created by: Rockabelle122