Chapter 3 Review
Chemistry of Life
Atoms
• The smallest unit of matter that cannot be
broken down by chemical means
Covalent Bonds
• Bonds between the atoms that make up water
molecules
Ions
• An atom that has either has lost or gained an
electron
Solutions
• Is a mixture of evenly distributed substances
Water
• Water is polar and therefore polar substances
dissolve in it.
Chemical Reactions
• In chemical reactions energy may be
absorbed, released, and required.
Energy
• Without energy organisms can not:
– Maintain homeostasis
– Carry out chemical reactions
– Make their own food
Carbon
• The basic unit of most biomolecules contain
Compounds
• Are formed when atoms of two different
elements join together
Enzymes
• Reduce the activation energy of chemical
reactions
Basic
• Having a pH between 7 and 14
Cohesion
• An attraction between substances of the same
kind
Adhesion
• An attraction between different substances
Acid
Acids
• Are compounds that form extra hydronium
ions when dissolved in water
RNA
• Subunits are made of a sugar, a base, and a
phosphate group
Carbohydrates
• A class of organic compounds made of carbon,
hydrogen, and oxygen atoms in a 1:2:1 ratio
Lipids
• A class of organic compounds that include
fats, steroids, and waxes
ATP
• Provides temporary storage of energy for cells
Protein
• A molecular chain of amino acids
pH
• A measure of the concentration of hydronium
ions in solutions
Test
•Tomorrow on Chapter 2
•Please Study these notes