Shared Flashcard Set

Details

Microbiology
Microbiology Chapter 2
28
Microbiology
Undergraduate 2
10/04/2011

Additional Microbiology Flashcards

 


 

Cards

Term
What is Na+ more likely to
interact with
Definition
Cl-
Term
Ionic bonding
Definition
one molecule loses an electron one gains an electron
Mostly found in inorganic substances
Term
Covalent bonding
Definition
Electrons are shared to form a bond.
Found in most organic substances
Term
Which is a definition of a base?
Definition
hydrogen ion (H+) acceptor
Term
Every chemical bond represents
Definition
potential energy
Term
What type of molecules will stick
to polar molecules?
A. nonpolar
B. polar
C. ionic
D. A and B
E. B and C
F. A, B, and C
Definition
E. B and C
Term
Acid =
Definition
H+ donor and low PH
Term
Base =
Definition
H+ acceptor and high PH
Term
What the effect of salt on PH?
Definition
none
Term
What is the effect of a buffer?
Definition
Resists PH change
Term
What is the key element in the formation of polymers?
What type of bond do they have- ionic or covalent?
Definition
Carbon is the essential element
Covalent bonds
Term
Carbohydrates are also known as...
Definition
saccharides--i.e. four chemical groupings: monosaccharides, disaccharides, oligosaccharides, and polysaccharides.
Term
Saccharides-definition
Definition
Sugars
Term
Ready source of energy
Definition
Carbohydrates
Term
Polysaccharides
Definition
polymeric carbohydrate structures, formed of repeating units (either mono- or di-saccharides) joined together by glycosidic bonds.
Term
Lipids are...
Definition
Energy storage; structure
• Nonpolar
• Fats (triglycerides)
– glycerol
– three fatty acids
Term
Which is more solid - Saturated or unsaturated fats?
Definition
Saturated fats
Term
Phospholipids
Definition
lipids that build membranes
Term
Steroids
Definition
have carbon ring structures; sterols have a functional hydroxyl(OH-) group.
four-ring structure
– structure + signaling
Term
Sterol function?
Definition
separate the fatty acid chains and thus prevent the packing that would harden the plasma membrane at low temperatures
Term
Which is more prevalent at low temperatures
Saturated or unsaturated fatty acids?
Definition
Saturated
Term
What are the building blocks of proteins?
Definition
Amino acids
Term
Bonds between amino acids.
Definition
Peptide bonds
Term
Proteins are described in terms of four levels of organization
Definition
primary, secondary, tertiary, and quaternary.
Term
Nucleic acids, what do they form?
What is their importance?
Definition
Form DNA and RNA
Information storage and transfer
Term
Structural units of nucleic acids
Definition
nucleotides
Term
How do DNA and RNA differ in structure?
Definition
DNA is double stranded RNA is usually single stranded.
RNA nucleotide is ribose. which has one more oxygen atom than deoxyribose. Also. one of RNA's bases is uracil (U) instead of thymine.
Term
The rules of base pairing (or nucleotide pairing) are:
Definition
A with T: the purine adenine (A) always pairs with the pyrimidine thymine (T)
C with G: the pyrimidine cytosine (C) always pairs with the purine guanine (G)
Supporting users have an ad free experience!