Which of the following media is most enriched?
Nutrient Agar
Blood Agar
Chocolate Agar
Only nutrient agar allows the growth of fastidious bacteria
Name the two dyes used for gram staining
Crystal violet
Conicheal
Safranine
Iodine is used to darken the crystal violet
The Gram -ve bacteria lose dye when exposed to decoloriser
The peptidoglycan layer is sandwiched between two membranes- what bacteria am I describing?
Gram +ve
Gram -ve
Why, when streaking, do you take samples from each previous streak and sterilise inbetween?
To reduce the no of bacteria on the loop each time- eventually you'll be spreading single bacteria, which grow to colonies
I can't think of an answer that might fool you, so yeah, just leaving this...
