Biological Molecules Flashcards
Describe with relationship with fats that are unsaturated and intermolecular forces
Fats with MORE unsaturation, experience WEAKER intermolecular forces
How does viscosity and unsaturation compare ?
viscosity depends on intermolecular forces, hence more viscosity means decreased unsaturated
What technique is used to separate fats and fatty acids ?
Extraction in base.
The functional groups of fat and fatty acid molecules are esters and carboxylic acids, respectively. The best way to separate neutral (ester) and acidic (carboxylic acid) functional groups is by a solvent extraction with basic aqueous solution
What is the electrostatic force in lipophilic media ?
LONDON Dispersion forces.
Since lipophilic means lipid loving, lipids are non polar in motion hence London dispersion forces will hold non polar m molecules together
Are ammonium salts soluble or insoluble ?
All Ammonium salts are SOLUBLE
What is the length of a fatty acid
The length of a fatty acid = radius of a micelle
what kind of molecules can rotate plane-polarized light ?
molecules with CHIRAL centers
what are amphoteric molecules?
**Molecules that can acts as a base or an acid
Which organic chemistry processes are NOT stereoselective ?
NOT stereoselective:
- Gabriel Masonic ester synthesis
-Strecker Synthesis
-Alpha-amination
they all have at least one step where it is possible for one of two equivalent groups to react, resulting in a racemic mixture.
Which one is better leave in group, chloride or bromide ?
Bromide is the better leaving group
Differentiate between basic and acidic amino acids and know their charge
Basic amino acids: lysine, histidine and arginine, have POSITIVE charge
Acidic amino acids: Aspartic acid and glutamic acids, have NEGATIVE charge
How many chiral centers does glucose 6 phosphate have?
Glucose 6 phosphate has 5 chiral centers, hence 2^5 = 32 STEREOISOMERS
Can you obtain a pure sample in solution ?
No a pure sample in solution is NOT attainable
What is an example of converting alpha-furanose to beta furanose?
Mutarotation
What kind of molecules are toluene, benzene and n-heptane?
NONPOLAR molecules
