Chemistry of Life Flashcards
Unit 1 AP Biology
Anything that has mass and takes up space
Matter
Matter in its simplest form
Element
Smallest form of an element that still displays its particular properties
Atom
Positive Charge
Cations
Negative Charge
Anions
Composed of more than one type of element
Compound
Contain carbon and usually hydrogen
Organic Compounds
NH2 group with R, contains amino acids
Amino group
R-C=OH-H group, hydroxide in one of the R spots and a carbon chain in the other
Carboxyl group
These molecules are polar
Water Molecules
The attraction between a positively charged atom and any other electronegative atom, such as oxygen
Hydrogen bonding
Water molecules linking together due to hydrogen bonds
Cohesion
A water molecule is attracted to another substance due to hydrogen bonds
Adhesion
Helps regulate body temperatures due to the water temperature slowly changing as well as holding the temperature well
High Specific Heat/ Heat Capacity
The energy required to transform a given quantity of a substance from a liquid into a gas at a given pressure. An example would be sweating
Heat of Vaporization/Evaporation Cooling
Made up of single units called monomer that are joined together via covalent bonds to form large polymers
Macromolecules
Allows water to be resistant to external forces due to the cohesive nature of the water molecules to one another instead of to the surrounding molecules in the air
Surface tension
Solid water molecules form a lattice that is less than liquid water which therefore floats. An example would be ice or a frozen lake
Density Changes
The partially positive hydrogen atom connect to the partially negative charged oxygen through ________ _____
Hydrogen bonds
Name the four macromolecules
Carbohydrates, Lipids, Proteins, and Nucleic Acids
Forms a covalent bond between two monomer units while releasing a water molecule
Dehydration Synthesis
Covalent bonds between monomer units are broken by the addition of water
Hydrolysis
A bond in which atoms share one or more electrons
Covalent bonds
This macromolecule is an organic compound used by cells as a long-term energy storage or building blocks
Lipids
This macromolecule is hydrophobic and insoluble in water
Lipids
These are the most important lipids
Fats, oils, steroids, and phospholipids
This macromolecule is made by combining glycerol and three fatty acids
Lipids
Contains no double bonds
Saturated Fats
Contain one or more double bonds
Unsaturated fats
Is a lipid composed of four carbon rings. An example of this would be Cholesterol
Steroids
A lipid formed by combining a glycerol molecule with two fatty acids and a phosphate group
Phospholipids