BMS 127 Ch. 2 The Chemistry of Microbiology Flashcards
What is the atomic mass of an atom?
The total protons + neutrons
What subatomic structure have no electrical charge?
neutrons
What is different about an isotope of iodine to regular iodine?
Number of neutrons
Is water an organic compound?
No, lacks carbon atoms
What is the chemical bond that hold water molecules together called?
polar covalent bonds
In water, cations and anions of salts disassociate from one another and become surrounded by water molecules. In this state, the ions are called __________.
electrolytes
Does a soda with a pH of 2.9 have a higher or lower concentration of hydrogen ions than water?
Higher
Proteins are polymers of __________.
amino acids
Are lipids hydrophobic or hydrophilic?
hydrophobic
What is the outermost electron shell of an atom called?
valence shell
The type of chemical bond between atoms with nearly equal electronegativities is called a(n) ________ bond.
nonpolar
The principal short-term energy storage molecule in cells is called _____.
ATP
The most common long-term energy storage molecule is _____________.
triglycerides
Groups of atoms such as NH2 and OH that appear in certain common arrangements are called ________.
functional groups
The reverse of dehydration synthesis is ____________.
hydrolysis
