Agar is used for solidifying culture media because the melting and solidifying points of agar solution are not the same All of these it does not affect by the growth of bacteria it does not add to the nutritive properties of the medium TRUE ANSWER : ? YOUR ANSWER : ?
The medium which allows the growth of more than one microorganisms of interest but with morphologically distinguishable colonies is known as none of these enrichment medium selective medium differential medium TRUE ANSWER : ? YOUR ANSWER : ?
Pseudomonas aeruginosa forms a blue water soluble pigment called chlororaphin pyocyanin β-carotene pyoverdin TRUE ANSWER : ? YOUR ANSWER : ?
In the process of freeze drying, a dense cell suspension is placed in small vials and is frozen at -60 to -78°C -30 to -48°C -48 to -58°C -20 to -30°C TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following chemotherapeutic agents may affect the growth of Campylobacter jejuni? Vacomycin Trimethoprim Polymyxin None of these TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following methods is most likely to be quantitative? Dilution and plating Wet mount Gram staining None of these TRUE ANSWER : ? YOUR ANSWER : ?
Viable plate count can be obtained using both (a) and (b) Pour plate method Spread plate method Hemocytometer TRUE ANSWER : ? YOUR ANSWER : ?
Important example(s) of enriched medium/media is/ are Blood agar Loeffler's serum slope All of these Bordet-gengou medium TRUE ANSWER : ? YOUR ANSWER : ?
When a substance is added to a solid medium which inhibits the growth of unwanted bacteria but permits the growth of wanted bacteria, it is known as selective medium enrichment medium differential medium enriched medium TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is used for the proper maintenance and preservation of pure cultures? Periodic transfer to fresh media Preservation by lyophilization Preservation by overlaying cultures with mineral oil All of these TRUE ANSWER : ? YOUR ANSWER : ?