Glossary of -2- 2 micro
Other Decks By This User
- Measure of the attraction of an atom for an electron.
- Polar covalent bonds
- Formed btwn 2 atoms with DIFFERENT ectronegativities.
- Nonpolar covalent bonds
- The shared pair of electrons are attracted equally by 2 atoms.
- Hydrogen bonds
- Weak attraction btwn 2 atoms (one of which is hydrogen) bearing partial electrical charges.
heat breaks these bonds.
- Chemical reactions
- Occur when chemical bonds are formed or broken.
Collisions btwn molecules may result in formation of new compounds.
Acid base balance
- What are some important biological molecules?
- Cohesive and Adhesive
High Specific Heat
High boiling point
High heat of vaporation
High freezing point
A good solvent
- What are the characteristics of a water molecule?
- Holding together of like substances
Hydrogen bonds hold H20 molecules tightly together -> surface tension.
- Holding together of different substances -> capillary action.
- High specific heat
- Can absorb a lot of heat energy without its temp. increasing much, and must lose a lot of heat to lower its temp.
- Thermal conductivity
- Heat rapidly spreads. No hot spots.
- High boiling point
- changing from liquid to gas through kinetic energy.
- High heat of vaporization
- Prevents excess loss of water in lakes and ponds.
- High freezing Point
- Water is less dense when frozen.
Water expands upon freezing and floats.
Ice is a good insulator.
Preserves life in lakes and ponds.
- A good solvent
- Dissolves more different substances than any other known ligquid.
- Hydrogen ion
- Hydroxide ion
- Increases the hydrogen ion conc. of a solution.
- Decrease the hydrogen ion conc. of a solution.
- minimizes changes in pH
- pH drops below 7.3
can cause coma.
below 6.9 is fatal.
- pH goes above 7.5
can cause convulsions, cessation of respiration (apnea)
pH 7.8 causes tetany
- Acid base balance
- How many elements are living organisms composed of?
- What are the most abdundant chemical elements in living organisms?
- Organic compounds
- Carbon containing compounds
- Carbon has __ electrons in its outer most shell and can easily bond with other carbon atoms as well as other _________.
- 1. Carbohydrates
4. Nucleic Acids
- Name 4 macromolecules.
- large organic polymers
- Polymerization Reactions
- Link 2 or more small molecules to for large molecules with repeating structural units. Macromolecules are polymers consisting of many small repeating molecules. The smaller molecules are called __________.
- Dehydration or condensation synthesis
- Molecules are covalently linked, resulting in the formation of a molecule of _______. One monomer loses an (OH) and the other loses a (H).
This requires ________ and _________.
- condensation reaction in reverse.
breaks covalent bonds btwn monomers by the addition of ____. H bonds to one monomer and OH binds to the adjacent monomer.
- consist of tens or hundreds of monosaccharides joined through dehydration synthesis. Starch, glycogen, dextran, and cellulose are polymers of glucose that are covalently bonded differently. Chitin is a polymer of 2 sugars repeating many times.
- Are the primary components of cell membranes.
Consists of C,H, and O.
Are nonpolar and insoluble in water.
- Simple lipids
- Called fats or __________ contain glycerol and fatty acids
formed by dehydration synthesis.
unsaturated fats have one or more double bonds in the fatty acids.
- Complex lipids
- contain C,H, and O + P, N, or S.
Membranes are made of phospholipid.
You must Login or Register to add cards