Biochemistry Flashcards
1
Q
Ground level
A
Electrons in the lowest available energy level
2
Q
Excited state
A
When an atom absorbs energy and its electrons move to a higher energy level
3
Q
Ionic bonds are between?
A
Metal to nonmetal
4
Q
Covalent bonds are between?
A
non-metals
5
Q
Anion
A
An atom that gains electrons; a NEGATIVE ion
6
Q
Cation
A
A POSITIVE ion; loses an electron
7
Q
What is the result of a covalent bond?
A
Molecule
8
Q
What kind of molecule is CO2?
A
Nonpolar
9
Q
Specific heat
A
The amount of heat that must be absorbed for 1 gram of a substance to change its temperature 1 Celsius
10
Q
Transpirational-pull cohesion tension
A
Water moves up a tall tree from roots to leaves without energy
11
Q
Spring overturn
A
- ice covers surface of water when cold and melts in spring
- Becomes denser water, and sinks to the bottom, causing water to circulate throughout the lake
- Oxygen from the surface is returned to the depths and nutrients released by bottom-dwelling bacteria are carried up
- The cycling of teh nutrients in the lake
12
Q
pH
A
- A measure of acidity and alkalinity of a solution
- Negative logarithm of the hydrogen ion concentration in moles per liter
- 1=0.1 molar; 2=0.01 molar
13
Q
Acids
A
- release hydrogen ions
- start with a hydrogen
14
Q
Bases
A
- accept hydrogen ions with hydroxide ion
- ends with OH
15
Q
Bicarbonate ion
A
The most important buffer in human blood (HCO3-)
