CELL CULTURES AND CHARACTERISTICS QUIZ

Treponema species from human oral cavity can be selected by using

all of these

cell size and motility

incubation temperature

pH of the medium

TRUE ANSWER : ?
YOUR ANSWER : ?

A medium containing crystal violet dye plus sodium deoxycholate will allow

none of these

gram (-)ve intestinal bacteria to grow

gram (+)ve intestinal bacteria to grow

aquatic bacteria to grow

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following bacteria can grow in acidic pH?

Salmonella

Shigella

Vibrio cholerae

Lactobacilli

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following problem makes it impossible to satisfy all of Koch's postulates?

Microorganism cannot be isolated in pure culture

Genes from the microorganism cannot be amplified by PCR

Microorganism causes serious symptoms in humans

Species of microorganism is in question

TRUE ANSWER : ?
YOUR ANSWER : ?

For the selection of lactobacilli present in cheddar cheese, the pH of the medium is maintained at

5.35

4.35

5.75

6.35

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is used for the proper maintenance and preservation of pure cultures?

Preservation by overlaying cultures with mineral oil

Preservation by lyophilization

Periodic transfer to fresh media

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Viable plate count can be obtained using

Pour plate method

Hemocytometer

both (a) and (b)

Spread plate method

TRUE ANSWER : ?
YOUR ANSWER : ?

Important example(s) of enriched medium/media is/ are

Blood agar

All of these

Bordet-gengou medium

Loeffler's serum slope

TRUE ANSWER : ?
YOUR ANSWER : ?

Stuart's transport medium is used for transport of specimen containing

Salmonella

Shigella

Vibrio cholerae

Neisseria gonorrhoeae

TRUE ANSWER : ?
YOUR ANSWER : ?

Selective media facilitate growth of only one kind of organism. Saboraud medium is used to selectively isolate

acid fast organisms

gram positive bacteria

coliform bacteria

yeasts

TRUE ANSWER : ?
YOUR ANSWER : ?

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