Microbiology MCQs Mock Test - Chapter 8

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Chapter 8 with our Microbiology MCQs Mock Test and explanations! Test your knowledge and understanding of key concepts with our complete set of multiple choice questions with detailed explanations for each answer. Increase your confidence and understanding of the fascinating world of microorganisms!

Return to Chapter 8 for Explanations

Microbiology MCQs Mock Test Home

Mocrobiology MCQs Home

Return to Chapter 8 for Explanations

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Microbiology Department

Microbiology MCQs Chapter 8

Chapter 8 with our Microbiology MCQs and explanations! Test your knowledge and understanding of key concepts with our complete set of multiple choice questions with detailed explanations for each answer. Increase your confidence and understanding of the fascinating world of microorganisms!

1 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

The differentiate lactose and non-lactose fermentors, the medium used is?

Wilson & lair

Tetra thionate broth

Blood Agar

Mac-Conkey’s Agar

2 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

The sterilizing agent is?

Nitrogen

Ethelene oxide

Carbon tetrachloride

Oxygen

3 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

L-Lysine is produced from?

Clostridium botulinum

Corynebacterium glutamicum

Pseudomonas

Mycobacterium sps

4 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

Which of the following method of sterilization has no effect on spores?

None of these

Autoclave

Drying

Hot air oven

5 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

Separation of a single bacterial colony is calle?

Isolation

Pure culturing

Separation

All of these

6 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

Treponema pallidum can be best indentified using?

Fluorescence microscope

Dark field microscope

Flourescence microscope

Bright field microscope

7 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

Lysozyme is effective against?

Gram negative bacteria

Helminthes

Protozoa

Gram positive bacteria

8 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

In the medium other than nutrients, if any substance is used in excess, that medium is?

Enriched medium

Special medium

Enrichment medium

None of these

9 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

Salts of heavy metals used as disinfectants are?

Thiomersal

All of these

Phenyl mercury nitrate

Mercurochrome

10 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

This is an agar plate method and is commonly used for estimation of the number of bacteria in milk?

Standard Plate Count (SPC)

Spread plate

Lawn culture

Roll tube method

11 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

Which of the following induces dimerisation of thymine?

X-rays

U.V. rays

ã-rays

None of these

12 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

Enhancement of virulence in bacteria is known as?

Exaltation

Toxigenicity

Pathogenicity

Attenuation

13 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

The orderly increase in the quantity of all of the cellular components is known as?

Growth

None of these

Binary fission

Reproduction

14 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

The spores of the bacteria which can withstand the moist heat effect also?

Bacillus subtilis

Bacillus stearothermophilus

Coxiella burnetti

Pseudomonas

15 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

For effective sterilization in an autoclave the temperature obtained is?

120°C

180°C

100°C

50°C

16 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

Infrared radiation is a method of sterilization by?

Moist heat

Mechanical method

Dry heat

Chemical method

17 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

Cultures are prepared by penetrating the inoculation loop with suspension into the medium, they are?

Stabcultures

Sub-cultures

None of these

Stock cultures

18 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

Agar is obtained form?

Green algae

Red algae

Blue-green algae

Brown algae

19 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

Algae are rich in?

All of these

Vitamins

Carbohydrates

Proteins

20 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

Theobacillus thio oxidans grow at pH?

7.0

6.0

2.0

9.5

21 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

Viruses can be cultivated in?

Living cells

Broth

None of these

Lab media

22 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

The bacterial culture prepared by pure culture is?

Inoculum

Suspension

None of these

Dilution

23 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

Which of the following is ionizing radiation?

None of these

U.V. rays

γ-rays

24 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

Tyndallisation was proposed by?

Pasteur

Jenner

Koch

Tyndall

25 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

Separation of a single colony is?

Separation

Pure-culturing

Both Pure-culturing and Isolation

Isolation

26 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

Aldehydes, which are most powerful disinfectants?

Acetaldehyde

Glutamal aldehyde

Formaldehyde

Both Formaldehyde and Glutamal aldehyde

27 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

Glassware are sterilized by?

Incineration

Autoclaving

Autoclaving and Hot air over

Hot air over

28 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

The temperature required for pasteurization is?

Above 100°C

None of these

Below 100°C

100°C

29 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

Best method for getting pure culture is?

Agar slant

Streak-plate

Both Streak-plate & Agar slant

None of these

30 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

By pasteurization?

Only non-pathogenic forms can be removed

Only pathogenic forms can be removed

All of these are correct

All the microorganisms can be removed

31 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

Example for indicator medium is?

Czapeck-dox medium

Nutrient broth

Nutrient Agar

Wilson and Blair

32 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

Temperature used for hot air oven is?

160°C for 1 hour

120°C for 1 hour

100°C for 1 hour

60°C for 1 hour

33 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

Factors on which disinfectivity of a disinfectant depends?

Time of action

All of the above

Concentration of the substance

pH of the medium and temperature suitable for the chemical

34 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

When food material are preserved at a temperature just above freezing temperature, the process is called?

Freezing

Chilling

Pasteurisation

Frosting

35 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

Spores are killed by?

Autoclaving

Glutaraldehyde

70% alcohol

Both Glutaraldehyde and Autoclaving

36 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

At the temperature 160oC for one hour, complete sterilization occurs in?

Incubator

Autoclave

Hot air oven

Laminar flow

37 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

Lyophilization means?

Sterilization

Burning to ashes

Freeze-drying

Exposure to formation

38 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

Discontinuous heating is called?

Pasteurization

Fermentation

Sterilization

Tindalisation

39 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

To transfer cultures from one place to another, the device used is?

Slant

Inoculation loop

Needle

Autoclave

40 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

Growth period of the culture is?

Inoculation

Incineration

Isolation

Incubation

41 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

In autoclave, the principle involved is?

Dry heat

Steam under pressure

Moist heat

Both Moist heat and Steam under pressure

42 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

Isolation is?

Purification of culture

To grow microorganisms on surfaces

Separation of a single colony

Introduction of inoculum

43 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

A gram positive organism which produces swarming on culture medium is?

Salmonella

Clostridium

Staphylococci

Proteus

44 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

Blood agar medium is?

Differential medium

Enrichment medium

Enriched medium

Selective medium

45 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

Example of Anaerobic medium is?

Nutrient broth

Robertson cooked-meat medium

Mac-Conkey’s agar

Nutrient agar

46 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

Slow freezing requires the conditions?

None of these

-15°C to -30°C for 10 min.

-6°C to – 10°C for 10 min.

0°C to 15°C for 15 min.

47 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

Phenol co-efficient indicates?

Dilution of a disinfectant

Purity of a disinfectant

Efficiency of a disinfectant

Quantity of a disinfectant

48 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

The bacterial culture prepared by pure culture method is?

None of these

Dilution

Suspension

Inoculum

49 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

Accridine dyes are more effective against?

Gram negative

Rickttsiae

Gram positive

Mycoplasmas

50 / 50

Category: Microbiology

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Microbiologists examine specimens like blood, urine, and body fluids for the presence of bacteria, viruses, fungi, and parasites.

Temperature in pasteurization is?

62.8°C

60.8°C

35.7°C

68.2°C

Your score is

Return to Chapter 8 for Explanations

The questions are typically designed to assess the technical skills and knowledge required for the laboratory profession, including the ability to analyze laboratory test results, perform laboratory procedures, and maintain laboratory equipment.

To prepare for these MCQs, candidates should have a thorough understanding of the key concepts and principles of laboratory science. They should also be familiar with common laboratory equipment and procedures, as well as laboratory safety protocols.

Candidates may also benefit from studying specific laboratory science textbooks or taking online courses that cover the material tested in the MCQs. Additionally, practicing sample MCQs and reviewing the answers can help candidates identify areas where they may need to improve their knowledge or skills.

Overall, the MCQs for lab technologists are designed to be challenging and comprehensive, requiring candidates to demonstrate a high level of proficiency in the field of laboratory science.

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