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;
15 Cards in this Set
- Front
- Back
|
What is a property of selective agar?
|
Allows some microbes to grow byt not other
|
|
|
What is a property of differential agar?
|
Distinguishes between differend kinds of microbes
|
|
|
What kind of growth do bacterial cultures undergo?
|
Exponential growth: Nt - N0 * 2^g
|
|
|
What is the composition of a gram-negative bacteria's coat?
|
Outer to inner:
LPS Outer membrane Peptidoglycan layer Inner membrane |
|
|
What is the composition of a gram-positive bacteria's coat?
|
Outer to inner:
Thick peptidoglycan wall Inner membrane |
|
|
What is the difference between eukaryotic and prokaryitoc ribosome?
|
Prokaryotic: 70S (vs. 80S eukaryotic)
30S and 50S subunits |
|
|
What is the difference between the genetic organization of prokaryotes and eukaryotes?
|
Genes are organized in operons
Plasmis are common No histones No introns |
|
|
What are the types of mobile bacterial genetic elements?
|
Plasmids
Transposons |
|
|
What is a bacteriophage?
|
A virus that targets bacteria
|
|
|
What is a component that is typically encoded by a bacteriophage?
|
Toxins
|
|
|
What is the process of bacterial transformation?
|
Donor cell lyses
Recipient cell picks up the naked DNA Naked DNA is incorporated into the recipient's genome |
|
|
What is the process of bacterial transduction?
|
Transducing phage containing donor genomic DNA is released from cdll
Phage infects recipient cell DNA is incorporated into recipient cells genomic DNA |
|
|
What are the components of an insertion sequence?
|
Core area containing genes (antibiotic resistance, transposase gene)
Inverted repeats around the core area Around the core area, dirct repeats |
|
|
What is a pathogenicity island?
|
Blocks of genes containing functionally-related genes inserted into a region of house-keeping genes.
|
|
|
What are Koch's four postulates?
|
The same pathogen must be present in every case of the disease
The pathogen must be isolated from the diseased host and grown in pure culture The purified disease must cause disease when a healthy animal is injected The pathogen must be isolated from the second animal and must be shown to be the original organism in pure culture. |
