Agar is used for solidifying culture media because it does not affect by the growth of bacteria it does not add to the nutritive properties of the medium the melting and solidifying points of agar solution are not the same All of these TRUE ANSWER : ? YOUR ANSWER : ?
The solidifying agent commonly used in preparation of media is/are both (a) and (b) agar none of these silica gel TRUE ANSWER : ? YOUR ANSWER : ?
For the selection of endospore-forming bacteria, a mixed culture can be heated at 70°C for 10 minutes 80°C for 10 minutes 60°C for 10 minutes 90°C for 10 minutes TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following techniques may be performed quantitatively to determine the number of bacteria of a particular type? Both (a) and (b) Spread plate Pour plate Streak plate technique TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following bacteria dies quickly after drying? Treponema pallidium Mycobacterium tuberculosis Staphylococcus aureus Pseudomonas aeruginosa TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following chemotherapeutic agents may affect the growth of Campylobacter jejuni? Vacomycin None of these Polymyxin Trimethoprim TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following bacteria can grow in alkaline pH? Lactobacilli Shigella Vibrio cholerae Salmonella TRUE ANSWER : ? YOUR ANSWER : ?
When a substance is added to a liquid medium which inhibits the growth of unwanted bacteria and favors the growth of wanted bacteria, it is known as enrichment medium enriched medium selective medium differential medium TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is used for the proper maintenance and preservation of pure cultures? Preservation by lyophilization Periodic transfer to fresh media Preservation by overlaying cultures with mineral oil All of these TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following bacteria can grow in acidic pH? Vibrio cholerae Salmonella Lactobacilli Shigella TRUE ANSWER : ? YOUR ANSWER : ?