The Isolation, Preservation and Improvement of Industrial Microorganisms

This quiz contains multiple-choice problems on isolation and industrially screening microbes, feedback control, industrial microorganisms’ preservation and improvement.

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Which of the following dye is colourless at acidic pH and becomes red at basic pH?

Methyl red Thymol blue Phenolphthalein Phenol red

Which of the following method is useful for detection and isolation of those microorganisms which are capable of growing on a particular nutrient medium?

Crowded plate technique Auxanographic technique Enrichment Culture technique Indicator dye technique

Which of the following is not a criterion for the choice of an organism?

The organism must be genetically stable

The organism must be able to produce a high yield of product

The optimum temperature for the growth of an organism must be above 50°C

The organism must be able to grow in an easily available nutrient medium

The full-form of ATCC is

American Type Culture Collection

Automatic Type Counter and Classifier

American Type Counter Collection

American Type Classifier and Collection

Which of the following methods is not used in the isolation and screening of desired microorganisms?

Crowded plate technique

Auxanographic technique

Enrichment culture technique

Hanging drop technique

Screening involves the detection and isolation of microorganisms of interest. True or false?

True

False

Which of the following method is useful for the isolation and detection of organisms having the ability to produce antibiotics?

Crowded plate technique

Auxanographic technique

Enrichment culture technique

Indicator dye technique

Which of the following shows the inhibition zone when a particular organism is grown on a petri dish?

Growth factor producers

Antibiotic producers

Organic acid producers

Amino acid producers

Prototrophs are organisms that cannot synthesise all growth requirements for themselves. True or false?

True

False

Which of the following method is useful for isolation and detection of organisms having the ability to produce organic acids?

Crowded plate technique

Auxanographic technique

Enrichment culture technique

Indicator dye technique

What is the pH range of bromophenol blue?

3.0 – 4.6

8.0 – 10.0

5 – 8

6.4 – 8.0

Which of the following method is useful for isolation and detection of organisms having the ability to produce growth factors?

Crowded plate technique

Auxanographic technique

Enrichment culture technique

Indicator dye technique

Which of the following methods proceeds with two-plate preparation?

Crowded plate technique

Auxanographic technique

Enrichment culture technique

Indicator dye technique

Which of the following plate is used to detect and isolate organic acid producers?

Phenol red plate

Potato dextrose agar plate

MacConkey’s agar plate

Rose Bengal agar plate

A test tube contains 9 mL of distilled water. 1g of soil is added to that test tube, and the soil is allowed to settle down. Now, 1 mL of that stock solution is taken and transferred to the test tube containing 9 mL of distilled water. The process is repeated several times until the requirement is met. For this dilution, it may be said that the solution was diluted

100-fold

10-fold

1000-fold

2-fold

Quiz/Test Summary
Title: The Isolation, Preservation and Improvement of Industrial Microorganisms
Questions: 15
Contributed by:
Ivan