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