Swelling of the can is caused primarily by

gas forming, aerobic spore formers

gas forming, anaerobic spore formers

gas forming, aerobic spore formers

Lactic acid bacteria in meats may be responsible for

slime formation at the surface or within especially in presence of sucrose

production of green discoloration

Ropiness caused by Enterobacter usually is

worse at the middle of the milk

worse at the bottom of the milk

Fluorescence microscopy can be used for the diagnosis of

Subacute sclerosing panencephalitis

Green rots in eggs is chiefly caused by

Micrococcus or Bacillus species

The technique first described to determine the incipient spoilage in meat was

homogenate extract volume (HEV)

Pseudomonas syncyanea produces a

brownish color to bluish gray in milk in its pure form

bluish gray to brownish color in milk in its pure form

brownish color to bluish gray in milk in its pure form

Under what conditions food poisoning bacteria may grow and produce toxins in vegetables?

When thawed vegetables are held below refrigerated temperature for any considerable period

When thawed vegetables are held at refrigerated temperature for any considerable period

When thawed vegetables are held at room temperature for any considerable period

When thawed vegetables are held below refrigerated temperature for any considerable period

128 + Mcqs in Viruses From Animal and Plants in Microbiology Page 2 McqOptions

51.	The transcription of the viral nucleic acid into mRNA is not necessary in case of
A.	RNA viruses
B.	ds DNA viruses
C.	ss DNA viruses
D.	all of these
Answer» B. ds DNA viruses

Discussion

52.	Mumps vaccine is prepared from the cultures of
A.	chick fibroblasts
B.	African green monkey cells
C.	healthy calves
D.	sheep
Answer» B. African green monkey cells

Discussion

53.	The microbes which are most likely to be completely dependent on a plant or animal host are
A.	viruses
B.	bacteria
C.	fungi
D.	algae
Answer» B. bacteria

Discussion

54.	The two major components of viruses are
A.	fat and protein
B.	nucleic acid and protein
C.	carbohydrate and nucleic acid
D.	fat and carbohydrate
Answer» C. carbohydrate and nucleic acid

Discussion

55.	Swelling of the can is caused primarily by
A.	gas forming, anaerobic spore formers
B.	gas forming, aerobic spore formers
C.	both (a) and (b)
D.	none of these
Answer» B. gas forming, aerobic spore formers

Discussion

56.	The commonest mode of transmission of HIV is
A.	parenteral
B.	perintal
C.	sexual
D.	oral
Answer» D. oral

Discussion

57.	Transfer of infection from cell to cell occurs mainly by direct transfer of virions via
A.	plasmodesmata
B.	cytodesmata
C.	protodesmata
D.	none of these
Answer» B. cytodesmata

Discussion

58.	Yellow discolorations in meat are caused by bacteria with yellow pigments, usually species of
A.	Micrococcus
B.	Flavobacterium
C.	both (a) and (b)
D.	Pseudomonas syncyanea
Answer» D. Pseudomonas syncyanea

Discussion

59.	Beef hams are made spongy by species of
A.	Rhodotorula
B.	Bacillus
C.	Pseudomonas
D.	red Bacillus
Answer» C. Pseudomonas

Discussion

60.	Acidophilus milk which is used for its therapeutic properties in intestinal disorders requires for its manufacture a pure culture of
A.	Lactobacillus bulgaricus
B.	Streptococcus thermophilics
C.	Lactobacillus acidophilus
D.	None of the above
Answer» D. None of the above

Discussion

61.	Lactic acid bacteria in meats may be responsible for
A.	slime formation at the surface or within especially in presence of sucrose
B.	production of green discoloration
C.	souring
D.	all of the above
Answer» E.

Discussion

62.	West Nile virus can cause a disease in human beings that may be transmitted from an infected bird to a person by a mosquito. This is an example of
A.	endogenous infection
B.	fomite borne disease
C.	arthropod borne disease
D.	nosocomial infection
Answer» D. nosocomial infection

Discussion

63.	What does the positive strand in double stranded RNA viruses stands for?
A.	rRNA
B.	tRNA
C.	mRNA
D.	None of these
Answer» D. None of these

Discussion

64.	Viral infections frequently observed in HIV disease is /are
A.	herpes simplex
B.	varicella- zoster
C.	cytomegalo virus
D.	all of these
Answer» E.

Discussion

65.	Stem and rots caused by species of molds involve
A.	leaves of fruits
B.	stem ends of fruits
C.	spotting on vegetables
D.	spotting on fruits
Answer» C. spotting on vegetables

Discussion

66.	Ropiness caused by Enterobacter usually is
A.	worse at the middle of the milk
B.	worse at the bottom of the milk
C.	worse near the top of the milk
D.	all of these
Answer» D. all of these

Discussion

67.	Which of the following viral infections is associated with the development of hydrophobia?
A.	Rabies
B.	Influenza
C.	Polio
D.	Hepatitis
Answer» B. Influenza

Discussion

68.	The species of animals which is most susceptible to rabies infection is
A.	dog
B.	cat
C.	fowl
D.	cow
Answer» C. fowl

Discussion

69.	Which of the following clinical specimens can be used for the demonstration of rabies antigen by direct immunofluorescence antemortem?
A.	Salivary smears
B.	Corneal smears
C.	Conjunctival smears
D.	All of these
Answer» E.

Discussion

70.	Which of the following viruses is star-shaped in outline and transmitted by the faecal-oral route?
A.	Astrovirus
B.	Calicivirus
C.	Hepatitis E virus
D.	Hepatitis D virus
Answer» B. Calicivirus

Discussion

71.	The virus(es) which has club-shaped peplomers and infects the respiratory tract is/are
A.	Coronavirus '
B.	Astroviruses
C.	Norwalk agent
D.	All of these
Answer» B. Astroviruses

Discussion

72.	Viropexis takes place in the phagocytic vacuoles and is due to the action of enzymes
A.	DNA gyrase
B.	lysosomal protease
C.	lysosomal lipase
D.	all of these
Answer» C. lysosomal lipase

Discussion

73.	The structural abnormality of cells is termed as
A.	hyperplasia
B.	anaplasia
C.	metastasis
D.	all of these
Answer» C. metastasis

Discussion

74.	The penetration of animal viruses into attached cells occur by mechanisms consisting of engulfment of whole virions by the cells in a phagocytic process called
A.	vitropexis
B.	viropexis
C.	ectodesmata
D.	vivopexis
Answer» C. ectodesmata

Discussion

75.	The tissue structure deteriorates as the virus multiplies. This deterioration is called
A.	aneuploidy
B.	protopathic effect
C.	cytopathic effect
D.	none of these
Answer» D. none of these

Discussion

76.	Which of the following virus is transmitted by genital route?
A.	Papillomaviruses
B.	Herpes simplex virus type 2
C.	Hepatitis B virus
D.	All of these
Answer» E.

Discussion

77.	The RNA sarcoma viruses, the most strongly transforming viruses may transform which of the following cells in a culture?
A.	fibroblasts
B.	myoblasts
C.	iris epithelial
D.	all of these
Answer» E.

Discussion

78.	The uncontrolled proliferation of cells is termed as
A.	hyperplasia
B.	anaplasia
C.	metastasis
D.	all of these
Answer» B. anaplasia

Discussion

79.	The spoilage of eggs by fungi goes through stages of mold growth that give the defects their names. Very early mold growth is termed
A.	pin-spot molding
B.	fungal rotting
C.	superficial fungal spoilage
D.	any of these
Answer» B. fungal rotting

Discussion

80.	Iced, cut up poultry often develops a slime i.e. accompanied by an odor describe as tainted, acid, sour or dishraggy. This defect is chiefly by the species of
A.	Pseudomonas
B.	Alcaligenes
C.	hetero-fermentative species
D.	catalase negative bacteria
Answer» B. Alcaligenes

Discussion

81.	The predominant micro-organisms in frozen foods are
A.	bacteria
B.	micro-coccus
C.	yeast and moulds
D.	none of these
Answer» D. none of these

Discussion

82.	White spot in meat is formed due to presence of
A.	P. expansum
B.	Sporotrichum carnis
C.	both (a) and (b)
D.	P. oxalicum
Answer» C. both (a) and (b)

Discussion

83.	Fluorescence microscopy can be used for the diagnosis of
A.	Subacute sclerosing panencephalitis
B.	Herpes simplex encephalitis
C.	Rabies
D.	All of these
Answer» E.

Discussion

84.	Fungal infection/s frequently observed in HIV disease is /are:
A.	candidiasis
B.	cryptococcosis
C.	aspergillosis
D.	all of these
Answer» E.

Discussion

85.	Surface taint in butter which is blamed on Pseudomonas putrefaciens is also called as
A.	rabbito
B.	putridity
C.	both (a) and (b)
D.	none of these
Answer» D. none of these

Discussion

86.	Green rots in eggs is chiefly caused by
A.	Pseudomonas fluorescens
B.	Micrococcus or Bacillus species
C.	Molds or yeasts
D.	all of the above
Answer» B. Micrococcus or Bacillus species

Discussion

87.	Species of __________ are predominant on thawing vegetables like sweet corn and peas when the temperature of thawing is fairly low.
A.	Streptococcus
B.	Micrococcus
C.	both (a) and (b)
D.	none of these
Answer» C. both (a) and (b)

Discussion

88.	The technique first described to determine the incipient spoilage in meat was
A.	homogenate extract volume (HEV)
B.	agar Plate Count (APC)
C.	extract Release Volume (ERV)
D.	none of the above
Answer» D. none of the above

Discussion

89.	The red color of meat, called its bloom, may be changed to shades of green, brown or grey as a result of production of oxidizing compounds by bacteria. Which of the following species are reported to cause the greening of sausage?
A.	Lactobacillus
B.	Leuconostoc
C.	Both (a) and (b)
D.	Pseudomonas
Answer» D. Pseudomonas

Discussion

90.	Interanuclear inclusion bodies are found in cells infected with
A.	Parvoviruses
B.	Herpesviruses
C.	Adenoviruses
D.	all of these
Answer» E.

Discussion

91.	The growth of Streptomyces on straw or elsewhere near the egg may produce
A.	musty or earthy flavors
B.	hay odour
C.	fishy flavor
D.	cabbage-water flavor
Answer» B. hay odour

Discussion

92.	Plant viruses penetrate host cells through transient ores called
A.	ectodesmata
B.	endodesmata
C.	cytodesmata
D.	protodesmata
Answer» B. endodesmata

Discussion

93.	The predominant lipid substance found in the viral envelope is
A.	phospholipids
B.	glycolipids
C.	neutral fat
D.	all of these
Answer» B. glycolipids

Discussion

94.	In storage atmospheres of high humidity variety of molds may cause
A.	superficial fungal spoilage
B.	bacterial spoilage
C.	both (a) and (b)
D.	none of these
Answer» B. bacterial spoilage

Discussion

95.	Pseudomonas syncyanea produces a
A.	bluish gray to brownish color in milk in its pure form
B.	brownish color to bluish gray in milk in its pure form
C.	gray to brownish color in milk
D.	yellow color in milk
Answer» B. brownish color to bluish gray in milk in its pure form

Discussion

96.	Yeast are most likely to grow in frozen fruits during
A.	slow thawing
B.	refrigeration
C.	ambient temperature
D.	none of these
Answer» B. refrigeration

Discussion

97.	Under what conditions food poisoning bacteria may grow and produce toxins in vegetables?
A.	When thawed vegetables are held at refrigerated temperature for any considerable period
B.	When thawed vegetables are held at room temperature for any considerable period
C.	When thawed vegetables are held below refrigerated temperature for any considerable period
D.	None of the above
Answer» C. When thawed vegetables are held below refrigerated temperature for any considerable period

Discussion

98.	Bacterial soft rot is caused due to
A.	fermentation of pectin
B.	fermentation of sugars
C.	formation of ketones
D.	formation of amino acids
Answer» B. fermentation of sugars

Discussion

99.	Which of the following microorganisms grow in beef at a temperature of 15°C and above?
A.	Micrococci
B.	Pseudomonas
C.	Both (a) and (b)
D.	Lactobacillus
Answer» D. Lactobacillus

Discussion

100.	Which of the following is recommended for the improvement in flavor during ageing of beef under controlled conditions?
A.	Thamnidium
B.	Rhizopus
C.	T. elegans
D.	M. mucedo
Answer» B. Rhizopus

Discussion

Explore topic-wise MCQs in Microbiology.

The transcription of the viral nucleic acid into mRNA is not necessary in case of

Mumps vaccine is prepared from the cultures of

The microbes which are most likely to be completely dependent on a plant or animal host are

The two major components of viruses are

Swelling of the can is caused primarily by

The commonest mode of transmission of HIV is

Transfer of infection from cell to cell occurs mainly by direct transfer of virions via

Yellow discolorations in meat are caused by bacteria with yellow pigments, usually species of

Beef hams are made spongy by species of

Acidophilus milk which is used for its therapeutic properties in intestinal disorders requires for its manufacture a pure culture of

Lactic acid bacteria in meats may be responsible for

West Nile virus can cause a disease in human beings that may be transmitted from an infected bird to a person by a mosquito. This is an example of

What does the positive strand in double stranded RNA viruses stands for?

Viral infections frequently observed in HIV disease is /are

Stem and rots caused by species of molds involve

Ropiness caused by Enterobacter usually is

Which of the following viral infections is associated with the development of hydrophobia?

The species of animals which is most susceptible to rabies infection is

Which of the following clinical specimens can be used for the demonstration of rabies antigen by direct immunofluorescence antemortem?

Which of the following viruses is star-shaped in outline and transmitted by the faecal-oral route?

The virus(es) which has club-shaped peplomers and infects the respiratory tract is/are

Viropexis takes place in the phagocytic vacuoles and is due to the action of enzymes

The structural abnormality of cells is termed as

The penetration of animal viruses into attached cells occur by mechanisms consisting of engulfment of whole virions by the cells in a phagocytic process called

The tissue structure deteriorates as the virus multiplies. This deterioration is called

Which of the following virus is transmitted by genital route?

The RNA sarcoma viruses, the most strongly transforming viruses may transform which of the following cells in a culture?

The uncontrolled proliferation of cells is termed as

The spoilage of eggs by fungi goes through stages of mold growth that give the defects their names. Very early mold growth is termed

Iced, cut up poultry often develops a slime i.e. accompanied by an odor describe as tainted, acid, sour or dishraggy. This defect is chiefly by the species of

The predominant micro-organisms in frozen foods are

White spot in meat is formed due to presence of

Fluorescence microscopy can be used for the diagnosis of

Fungal infection/s frequently observed in HIV disease is /are:

Surface taint in butter which is blamed on Pseudomonas putrefaciens is also called as

Green rots in eggs is chiefly caused by

Species of __________ are predominant on thawing vegetables like sweet corn and peas when the temperature of thawing is fairly low.

The technique first described to determine the incipient spoilage in meat was

The red color of meat, called its bloom, may be changed to shades of green, brown or grey as a result of production of oxidizing compounds by bacteria. Which of the following species are reported to cause the greening of sausage?

Interanuclear inclusion bodies are found in cells infected with

The growth of Streptomyces on straw or elsewhere near the egg may produce

Plant viruses penetrate host cells through transient ores called

The predominant lipid substance found in the viral envelope is

In storage atmospheres of high humidity variety of molds may cause

Pseudomonas syncyanea produces a

Yeast are most likely to grow in frozen fruits during

Under what conditions food poisoning bacteria may grow and produce toxins in vegetables?

Bacterial soft rot is caused due to

Which of the following microorganisms grow in beef at a temperature of 15°C and above?

Which of the following is recommended for the improvement in flavor during ageing of beef under controlled conditions?