Key Terms in Chemistry

acid,

activation energy,

activator,

active site,

amino acid,

amino group,

atom,

atomic mass,

atomic number,

base,

base (of DNA),

base (of RNA),

bond energy,

buffer,

carbohydrate,

carboxyl group,

cellulose,

chitin,

cholesterol,

competitive inhibitor,

complex carbohydrate,

covalent bond,

denaturation,

deoxyribonucleic acid (DNA),

disaccharide,

double bond,

double helix,

electron,

element,

enzyme,

fatty acid,

glycerol,

glycogen,

hydrogen bond,

hydrophilic,

hydrophobic,

inhibitor,

ion,

ionic bond,

ionic compound,

isotope,

lipid,

macromolecule,

mass,

molecule,

monosaccharide,

neutron,

noncompetitive inhibitor,

nucleic acid,

nucleotide,

nucleus,

peptide bond,

periodic table,

pH,

phospholipid,

polysaccharide,

primary structure,

protein,

proton,

quaternary structure,

radioactive,

ribonucleic acid (RNA),

saturated fat,

secondary structure,

simple sugar,

starch,

sterol,

substrate,

tertiary structure,

trans fat,

triglyceride,

unsaturated fat,

wax,

ABOUT THE CHAPTER OPENING PHOTO

Drops of dew bead on a dragonfly, magnifying parts of its compound eyes. The insects remain mostly immobile during the night and collect water droplets all over their bodies.

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