Intro to Biochem Flashcards
Define cells
Small, membrane-bound units filled with aqueous solutions of chemicals.
Hydrolysing
The chemical breakdown of a compound due to reaction with water.
Polarity
Uneven distribution of charge.
Polar
Molecule has a partial +ve charge and a partial -ve charge in another part
Nonpolar
Molecules lacking electronegative atoms and lacking strongly polarised bonds
What molecules is water keen to react with?
Polar molecules- as water is also polar. Water forms H-bonds with other polar molecules
List 9 properties of water
High MP, BP, heat of vaporisation.
Strong cohesion, strong surface tension, H bonds are 2 times longer than O-H, expands when in a lattice shape, H bonds form lattice in solid and water is an excellent solvent for polar solutes.
What ratio of water is H2O molecules?
Only 1/500 000 000 molecules are ionised.
Define mole
A measure of the amount of a substance
Molar mass
One mole of a substance in grams
What unit are proteins in the blood measured with?
g/L
What unit is enzyme concentration measured in?
U/L - this is a measure of its acidity. 1 unit (U) is the amount of enzyme that catalysed the reaction of 1umol of substrate per minute.
Acid- Brønsted-Lowry model
Proton donor
Base - Brønsted-Lowry Model
Proton Acceptor
Define pH
Measure of acidity in terms of molar concentration
