BIO217

Category: BIO217

ATTENTION:

Kindly note that you will be presented with 50 questions randomized from the NOUN question bank. Make sure to take the quiz multiple times so you can get familiar with the questions and answers, as new questions are randomized in each attempt.

Good luck!

BIO217

1 / 50

A. A phase in the growth curve during which there is no increase in cell number of a microbial population is called ____________. phase

2 / 50

B. Heat – sensitive liquids and gases are sterilized by the use of ___________ method

3 / 50

C. A regular polyhedron with twenty equilateral triangle faces and twelve vertices is known as __________

4 / 50

D. One of these is not an agricultural activity of microorganisms:

1. Production of ethanol

2. Biological central agents

3. Cycling of nutrients needed to maintain ecological balance

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

5 / 50

E. A form of asexual reproduction process in which a single cell divides into two cells after developing a transverse septum is called ___________

6 / 50

F. Which of the following genera of bacteria are aerobes or facultative anaerobes that from irregular clusters by dividing into two or more planes?

1. Peptococcus

2. Streptococcus

3. Staphylococcus

4. Micrococcus

7 / 50

G. Which of the following is not placed in any microorganism’s domain?

1. Protozoa

2. Viruses

3. Algae

4. Fungi

8 / 50

H. Mutation can involve the ____of nucleotides. I. division , II. addition, III. deletion

1. I and II

2. I only

3. III and II

4. II only

9 / 50

I. Spoilage of meat and / or vegetables in cold syorage can be caused by some _________

10 / 50

J. Most microorganisms cannot be seen without ___________

11 / 50

K. Human insulin and human growth hormone are produced by __________bacteria.

12 / 50

L. The most commonly used differential staining procedure is: __________

1. Gram staining

2. differential staining

3. Acid fast staining

4. Simple staining

13 / 50

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

1. psychophiles

2. thermophiles

3. hypothermophiles

4. mesophiles

14 / 50

N. ___________ coined the term cell.

15 / 50

O. Gram stain was developed in the year _________

16 / 50

P. Based on the source of energy bacteria can be classified as phototrophs and _________

17 / 50

Q. __________ is used to disinfect effluents from sewage treatment.

18 / 50

R. The union of a special male structure called a spermatium with a female reproductive structure is called ___________

19 / 50

S. The vegetative structure of a fungus is called a __________

20 / 50

T. In food preparation, microbes are reduced to acceptable levels using methods such as addition of vinegar and ___________

21 / 50

U. The most commonly used differential staining procedure is: ____________

1. Acid fast staining

2. Simple staining

3. Gram staining

4. differential staining

22 / 50

V. The Basidiomycota are known a _________ fungi.

23 / 50

W. The formation of diphtheria tetanus antitoxins was induced by: ___________

1. Francesco Redi

2. Joseph Lister

3. Robert Koch

4. Edwards Jenner

24 / 50

X. Simple acellular entities that can only reproduce within living cells are called _________

25 / 50

Y. The process by which the internal and external structures of cells and microorganisms are preserved and fixed in a position is known as: _________

1. staining of specimens

2. Stained smears of microorganism

3. Hanging drop technique

4. Fixation

26 / 50

Z. Which of the following is not a characteristic of the mycobacterium?

1. they are slightly straight or curved rods

2. they are acid fast

3. they are either saprophytes or pathogens

4. they are either anaerobes or preferentially anaerobic

27 / 50

AA. ______________ is used for food preservation.

28 / 50

AB. Which of the following statements best describe transduction?

1. a genetic transfer process by which free DNA is incorporated into the recipient cell

2. the formation of a new genotype by reassortment of genes

3. a mechanism of genetic transfer that involves cell to cell contact

4. a mechanism of genetic transfer in which a bacterial virus transfer DNA from one cell to another

29 / 50

AC. The microscope used to study microbial motility and determining the shape of line cells is: __________

1. Dark field microscope

2. Scanning microscope

3. Transmission microscope

4. Phase contrast microscope

30 / 50

AD. Alcoholic fermentation was found to be catalyzed by: __________

1. Catalase

2. Hydrogenase

3. Living yeast cells

4. Oxidase

31 / 50

AE. Alcoholic fermentation was found to be catalyzed by __________

32 / 50

AF. A system of surgery designed to prevent microorganisms from entering wounds was developed by __________

33 / 50

AG. Beijerinck and __________ pioneered the use of enrichment cultures and selective media.

34 / 50

AH. Which of the following groups of bacteria is not with unusual properties?

1. Budding bacteria

2. Gliding non – fruiting bacteria

3. Spirochetes

4. Archaeobacteria

35 / 50

AI. The vaccine for the disease anthrax was developed between the period:

1. 1880 - 1890

2. 1860 - 1870

3. 1890 - 1900

4. 1870 -1880

36 / 50

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

1. Compound microscope

2. Light microscope

3. Simple microscope

4. Electron microscope

37 / 50

AK. The class of microorganisms that has growth optima around 20 ۫C to 45 ۫C is __________

38 / 50

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

1. Compound microscope

2. Light microscope

3. Simple microscope

4. Electron microscope

39 / 50

AM. The acid used as a pharmaceutical to supply calcium to the body is: __________

1. Gubberellic acid

2. Lactic acid

3. Gluconic acid

4. Citric acid

40 / 50

AN. The microscope used in the examination of unstained organisms suspended in fields is called ________ microscope.

41 / 50

AO. The first person to publish an extensive, accurate observation of microorganisms was ___________

42 / 50

AP. __________ is the simplest virus.

43 / 50

AQ. Bacteria were first discovered in the year __________

44 / 50

AR. Which of the following disinfectants is used in food industries?

1. chlorine

2. ethylene

3. alcohol

4. aldehydes

45 / 50

AS. ___________ are the most plentiful form of plankton in the Arctic.

46 / 50

AT. Cell division in Saccharomyces cerevisiae occur by _________

47 / 50

AU. Who supported the theory of spontaneous generation?

1. Francesco Redi

2. Louis Jablot

3. Louis Pasteur

4. John Needham

48 / 50

AV. Systematic classification of fungi is based on sequence analtses of _________ RNA.

49 / 50

AW. Another name for phenol is _________

50 / 50

AX. ___________ was awarded the 1905 nobel prize for physiology or medicine.

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