Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
18 Cards in this Set
- Front
- Back
|
What are the 6 NUTRIENTS required for BACTERIAL GROWTH
|
CARBON
NITROGEN SULFUR PHOSPHORUS TRACE ELEMENTS (iron,copper,Manganese,Zinc) ORGANIC GROWTH FACTORS (vitamins,B1 B2, folic acid) |
|
|
Why is WATER necessary for BACTERIAL GROWTH
|
enzymes catalized metabolic reactiions
|
|
|
Why is OXYGEN required for BACTERIAL GROWTH
|
Cellular resperation
|
|
|
When and why is OXYGEN TOXIC to some organisms
|
Some organisums will produce free radicals which kills the organisum
|
|
|
PHYSICAL requirements for BACTERIAL GROWTH
|
PH....6.5-7.5
Temperature(minimum,maximum,optimal) Osmotic pressure |
|
|
What effects OSMOTIC PRESSURE
|
SALTS or SUGARS or SOLUTES in the cells enviroment
|
|
|
Difference between chemically-defined and complex media
|
chemically-each batch needs to be the same
complex-media may not be the same every time, may have unknowns in it |
|
|
why are selective and differential media used
|
SELECTIVE media contains ingredients that inhibit the growth of certian bacteria while allowing other to grow
DIFFERENTIAL media allows for easyer identification of multiple organisms |
|
|
name a Differential medium
|
MacConkey Agar
|
|
|
name a Selective medium
|
Mannitol Salt Agar
|
|
|
what are the 4 stages of bacterial growth
|
Lag (most active)
Log (expontially) Stationary Death |
|
|
What is a energy source for growth
|
carbs (fat,sugars)
|
|
|
name source and use for CARBON
|
source- herotrophs & autotrophs
use- to make own molocules |
|
|
what is the source and use for NITROGEN
|
source- decomposing protein
use- to make own protein & N. A. |
|
|
what is the source and use for SULFUR
|
source- proteins & amino acids
|
|
|
what is the source and use for PHOSPHORUS
|
source- phosphate
use- to make phospholipids |
|
|
what is the source and use for TRACE ELEMENTS
|
source- tap water
use- to activate enzymes |
|
|
what is the source and use of VITAMINS
|
source- enzyme co-factors,host,created in lab
use- promote enzyme activity |
