NUCLEIC ACID STRUCTURE QUIZ

Production of acetoin can be detected by which of the following tests?

Voges-Proskauer test

Indole test

Citrate test

Methyl red test

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following inference(s) indicate(s) the ability of an organism to utilize citrate as a sole source of carbon in Simmon's citrate medium?

None of these

Blue colour

Both (a) and (b)

Appearance of growth

TRUE ANSWER : ?
YOUR ANSWER : ?

What is the order of reagents used in the Gram stain?

Crystal violet, iodine, decolorizer, safranin

Safranin, crystal violet, decolorizer, iodine

Crystal violet, safranin, iodine, decolorizer

Crystal violet, iodine, safranin, decolorizer

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following(s) is/ are oxidase-positive bacteria?

Vibrio

Neisseria

All of these

Pseudomonas

TRUE ANSWER : ?
YOUR ANSWER : ?

Catalase production is negative in which of the following?

Proteus

Staphylococcus

Streptococcus

Salmonella

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following shows a positive urease test?

None of these

Klebsiella

Both (a) and (b)

Proteus

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following organisms can be demonstrated with silver impregnation method?

Shigella

Salmonella

Spirochaetes

Vibrios

TRUE ANSWER : ?
YOUR ANSWER : ?

The organisms that can be acid-fast stained is

Tubercle bacilli

Lepra bacilli

Nocardia

all of these

TRUE ANSWER : ?
YOUR ANSWER : ?

The primary stain of Gram's method is

crystal violet

methyl red

safranin

phenolpthalene

TRUE ANSWER : ?
YOUR ANSWER : ?

The production of sufficient acid by fermentation of glucose leads to decrease in pH such that pH of the medium falls below 4.5. Which of the following test can detect it?

Methyl red test

Voges-Proskauer test

Indole test

Citrate utilization test

TRUE ANSWER : ?
YOUR ANSWER : ?

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