chapter 3 review
DESCRIPTION
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. - PowerPoint PPT PresentationTRANSCRIPT
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