MCB 102 CBT PRACTICE TEST

Ace/Undergragra July 29, 2023

0 331 1 minute read

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Take your time to read instructions before taking this test.

There are 40 questions which you are to answer in 15 minutes that gives you roughly 30 seconds per question.

If you can get at least 60%, you can be rest assured that you’ll ace MCB 102 exam

In a normal exam you will be asked between 40 – 60 questions but I only arranged 40 questions

Note

Do not be in a hurry to answer the questions

Do not waste time on a question you don’t know

Move as fast as possible and starting with questions that don’t have calculation first to save time

Always crosscheck

Don’t be in a hurry to submit, you are not in a competition

Don’t be scared. Getting an A is easy

Don’t be over confident, you can end up a D, E or F. Calm your blood, no be only you sabi book

Please do well to use our comment box incase there’s a message you want to pass to us

70 – 100 A

60 – 69 B

50 – 59 C

45 – 49 D

40 – 44 E

0 – 39 F

I wish you success

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133

Created on July 29, 2023 By

Ace/Undergragra

MCB 102

1 / 40

1. Which of the following classes of microorganisms has growth optima around 20 ۫ C to 45 ۫ C?

A. hypothermophiles

B. mesophiles

C. thermophiles

D. psychophiles

2 / 40

2. Vaccination was invented by __________

A. Watson

B. Pasteur

C. Crick

D. Jenner

3 / 40

3. Tyrocidines are more effective against ____________

A. Gram-negative organisms

B. Mycoplasms

C. Gram-positive organisms

D. Spirochetes

4 / 40

4. Cellulose is degraded to cellobiose by the enzyme ________________

A. Hexokinase

B. Cellulase

C. Cellulose dehydrogenase

D. Beta-glucosidase

5 / 40

5. Which of the following statements best describe the term systematics?

A. the scientific study of organisms with the ultimate objective of arranging them in an orderly manner

B. a branch of taxonomy concerned with the assignment of names to taxonomic groups

C. the process of determining if a particular isolate belong to a recognized taxon

D. the organization of organisms into progressively more inclusive groups

6 / 40

6. Which among the following are microaerophilic bacteria?

A. Treponema

B. Cristispira

C. Spirochaeta

D. Borrelia

7 / 40

7. Which of the following is used in electron microscope?

A. Light waves

B. Electron beams

C. Magnetic fields

D. Electron beams and magnetic field

8 / 40

8. The following are agricultural activities of microorganisms except _______.

A. Biological central agents

B. Digestion of cellulose present in grasses on which ruminant animals feed

C. Cycling of nutrients needed to maintain ecological balance

D. Production of ethanol

9 / 40

9. Protozoa that eat other organisms are known as _____________

A. Saprophytic

B. Mutualistic

C. Parasitic

D. Holozoic

10 / 40

10.

Table of Contents

What is the approximate size of the bacterial cell

A. 0.5 - 1.0 micrometer in diameter

B. 1mm in diameter

C. 2mm in diameter

D. 2 micrometer in diameter

11 / 40

11. Acridine orange is which type of mutagen?

A. Base analog

B. Transposons

C. Intercalating agents

D. Chemical compound

12 / 40

12. Chemotrophs are:

A. Bacteria that obtain their energy by oxidizing inorganic chemical compounds

B. Bacteria that use light energy as their energy source

C. Bacteria that derive carbon from inorganic sources

D. Bacteria that derive their carbon from preformed organic nutrients

13 / 40

13. The following processes result in variation in microorganisms except _____.

A. mutation

B. recombination

C. gene association

D. gene transfer

14 / 40

14. Which of the following inhibits DNA replication?

A. Cathode rays

B. X rays

C. gamma rays

D. UV light

15 / 40

15. Which of the following environmental factors does not influence microbial growth?

A. Temperature

B. Water activity

C. Topography

D. pH

16 / 40

16. Molds and yeasts are important research tools in the study of these fundamental processes except ___.

A. Medicine

B. Cytology

C. Genetics

D. Biochemistry

17 / 40

17. The following are external structure of a bacterial cell wall except ____.

A. Spores

B. Flagella

C. Capsules

D. Spores and crysts

18 / 40

18. Which of the following is a family of lambda phage viruses?

A. Pedoviridae

B. Microviridae

C. Styloviridae

D. Corticoviridae

19 / 40

19. Organisms that are damaged by normal atmospheric level of oxygen and require oxygen level below the range of 2 to 10 % for are classified as:

A. obligate anaerobe

B. aerotolrant anaerobes

C. anaerobic

D. microaerophile

20 / 40

20. In which of the following treatment involve oxidation of organic constituents of the wastewater

A. Secondary treatment

B. Advanced treatment

C. Final treatment

D. Primary treatment

21 / 40

21. Cryptococcosis is a disease of ______________

A. Mycotic infection

B. Viral infection

C. Parasitic infection

D. Bacterial infection

22 / 40

22. Which of the following shapes can be assumed by a bacterium?

A. Circle

B. Vibrios

C. Square

D. Spiral

23 / 40

23. For which viral disease, vaccine has been recently developed through the use of tissue culture?

A. Measles

B. Rabies

C. Smallpox

D. Mumps

24 / 40

24. To which of the following class of microorganisms does Enterococus faccalis belong?

A. obligate anaerobe

B. microaerophile

C. aerotolrant anaerobes

D. Anaerobic

25 / 40

25. In bacterial cells, the capsules:

A. Increase surface area of the cell for nutrient absorption

B. Promote attachment of bacteria to surfaces

C. Enables individual cells to stay associated in cell colonies

D. Facilitates moderate change of position

26 / 40

26. A microscope in which the magnified image formed by the objective lens is further enlarged by one or more additional lenses is known as _______.

A. Electron microscope

B. Compound microscope

C. Light microscope

D. Simple microscope

27 / 40

27. The respiratory chain of bacteria is associated with the ______

A. Cell wall

B. Mitochondrial membrane

C. Cytoplasm

D. Cytoplasmic membrane

28 / 40

28. Which of the following are produced by microorganisms?

A. All the options

B. Fermented diary products

C. Bread

D. Alcoholic beverages

29 / 40

29. Which of the following occurs when a culture of microorganisms is transferred from a nutritionally poor medium to a richer one?

A. Shift left

B. Shift down

C. Shift right

D. Shift up

30 / 40

30. The following characterizes the cytoplasmic membrane except: _______.

A. It composed primarily of phospholipids and protein

B. It contains various enzymes involved in respiration and metabolism

C. It serves as a barrier to most water soluble molecules

D. The chromatin area is rich in DNA

31 / 40

31. Bacteria are divided into _____ volumes based on Bergey manual of systematic bacteriology.

A. 3

B. 4

C. 6

D. 5

32 / 40

32. Which was the first disease for which a chemotherapeutic agent was used?

A. AIDS

B. Malaria

C. Small pox

D. Syphilis

33 / 40

33. Who is known as the father of Microbiology?

A. Robert Koch

B. Ferdinand Cohn

C. Antoni Van Leeuwenhoek

D. Edwin John Butler

34 / 40

34. The vaccine for the disease anthrax was developed between the period __

A. 1880 - 1890

B. 1890 - 1900

C. 1860 - 1870

D. 1870 - 1890

35 / 40

35. Which part of the compound microscope helps in gathering and focusing light rays on the specimen to be viewed?

A. Condenser lens

B. Objective lens

C. Eyepiece lens

D. Magnifying lens

36 / 40

36. Glycolysis can occur in _________

A. Anaerobic cells

B. Neither aerobic cells not anaerobic cells

C. Both aerobic and anaerobic cells

D. Aerobic cells

37 / 40

37. The acid used as a pharmaceutical to supply calcium to the body is _______.

A. Lactic acid

B. Gubberellic acid

C. Citric acid

D. Gluconic acid

38 / 40

38. Which of the following deadly diseases cannot be prevented by vaccines?

A. Diarrhea

B. Whoooping cough

C. tuberculosis

D. Smallpox

39 / 40

39. What is Microbiology?

A. Study of animals and their family

B. Study of microscope

C. Study of molecules that are visible to the human eyes

D. Study of organisms that are not visible to the human eyes

40 / 40

40. Chrysolaminarin is the reserved food of ____________

A. Phaeophycophyta

B. Baccilariophycophyta

C. Xantophycophyta

D. Chlorophycophyta

Your score is

The average score is 52%

Please do well to drop a comment if this has really helped you. Thanks❤️

Ace/Undergragra July 29, 2023

0 331 1 minute read

What is the approximate size of the bacterial cell

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