CELL CULTURES AND CHARACTERISTICS QUIZ

Which of the following techniques may be performed quantitatively to determine the number of bacteria of a particular type?

Pour plate

Both (a) and (b)

Spread plate

Streak plate technique

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following bacteria dies quickly after drying?

Pseudomonas aeruginosa

Mycobacterium tuberculosis

Treponema pallidium

Staphylococcus aureus

TRUE ANSWER : ?
YOUR ANSWER : ?

All bacteria that inhabit the human body are

autotrophs

heterotrophs

chemolithotrophs

phototroph

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

All of these

Preservation by overlaying cultures with mineral oil

TRUE ANSWER : ?
YOUR ANSWER : ?

Viable plate count can be obtained using

Spread plate method

Pour plate method

Hemocytometer

both (a) and (b)

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following bacteria can grow in acidic pH?

Vibrio cholerae

Salmonella

Lactobacilli

Shigella

TRUE ANSWER : ?
YOUR ANSWER : ?

To select cholera-causing bacterium, Vibrio cholerae, the pH of the medium is maintained at a pH of

8.90

6.79

3.5

8.5

TRUE ANSWER : ?
YOUR ANSWER : ?

Cell counting can be carried out by

plate counting

direct microscopic count using petroffhansser counting chamber

All of these

membrane filter count

TRUE ANSWER : ?
YOUR ANSWER : ?

The concentration of agar to obtain semi solid media is

>10%

1.5-20%

>10%but<20%

0.5% or less

TRUE ANSWER : ?
YOUR ANSWER : ?

The solidifying agent commonly used in preparation of media is/are

none of these

silica gel

both (a) and (b)

agar

TRUE ANSWER : ?
YOUR ANSWER : ?

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