Water. The Nature of Water - H 2 O. Exists in three forms (gas, liquid and solid) Makes up approx 90% of organisms Versatile Solvent Important in the cell’s chemistry Gains and releases heat slowly High surface tension A “polar” molecule: 2 small hydrogen atoms 1 large oxygen atom.
4. Nucleic acids (DNA and RNA)
Solid at room temp.
White in color
Derived from animals
No double bonds between carbons
Fatty acids straight
Examples are the hard fats (lard)
Liquid at room temp.
Yellow in color
Derived from plants
Some double bonds between carbons
Fatty acids crooked
Examples include corn, canola, and olive oils
BETTER (healthier)Saturated vs. Unsaturated Fats
1. Storage: albumin (egg white)
2. Transport: hemoglobin
3. Regulatory: hormones
4. Movement: muscles
5. Structural: membranes, hair, nails, bones
6. Enzymes: cellular reactions
A. Primary Structure (1°)
B. Secondary Structure (2°)
C. Tertiary Structure (3°)
D. Quaternary Structure (4°)
Denaturation of proteins involves the disruption and possible destruction of both the secondary and tertiary structures.
Usually caused by: acids, bases, heat, alcohol