Introduction to Bacteria Flashcards
1
Q
What colour does a Gram positive bacterium elicit?
A
Purple
2
Q
What colour does a Gram negative bacterium elicit?
A
Red
3
Q
Describe the structure of a Gram positive bacterium
A
Plasma membrane, periplasmic space, peptidoglycan cell wall
4
Q
Describe the structure of a Gram negative bacterium
A
Plasma membrane, two periplasmic spaces around a thin peptidoglycan wall and a thick lipopolysaccharide wall
5
Q
What are the three ways bacteria can transfer genetic material?
A
Transformation, conjugation, transduction
6
Q
What is transduction?
A
DNA introduced from a bacteriophage (virus which infects bacteria)
7
Q
Describe the composition of MacConkey agar
A
Lactose, bile salts, neutral red indicator in agar hydrated gel
