40. What is agar?
41. What is agar extracted from?
42. What is agar composed of?
43. At what temperature does agar liquify? Solidify?
44. What kind of medium is TSA?
45. What does EMB stand for?
46. What is the carbon source on EMB that enables differentiation?
47. What kind of bacteria does EMB differentiate between?
48. What is the appearance of E. coli on EMB?
49. What makes MacConkey media selective?
Ans-40- a gelly like unbranched polysaccharide, used as a solidifying agent.
Ans-41- Red algae (Galidium and Gracilaria).
Ans-42- agarose and agaropectin
Ans-43- approximately 85-degree centigrade. solidify at 32 to 40-degree centigrade.
Ans-44- general-purpose media
Ans-45- Eosine Methylene Blue
Ans-46- lactose
Ans-47- lactose fermenting and non-lactose fermenting bacteria
Ans-48- blue-black colonies, often with a green metallic sheen
Ans-49- crystal violet and bile salt
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