20763099
Descripción
Test por Max Tuggle, actualizado hace más de 1 año
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Creado por Max Tuggle
hace más de 6 años
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Pregunta 1
Pregunta
Mark the common feature between eukaryotes and prokaryotes
Respuesta
-
Shape of DNA
-
Number of chromosomes
-
A prokaryotic cell is similar to a eukaryotic organelle
-
Cell wall
-
Peptidoglycan
Pregunta 2
Pregunta
The largest bacteria which can be visible by unaided eye is_______
Respuesta
-
Thiomargarita namibiensis
-
Lactobacillus
-
Mycoplasma
-
Pseudomonas
Pregunta 3
Pregunta
Which of the following is NOT bacteria?
Respuesta
-
Gram-positive bacteria
-
Mitochondrion
-
Chloroplast
-
Methanogens
-
Hyperthermophiles
Pregunta 4
Pregunta
Peptidoglycan
Respuesta
-
Bacteria and gives energy to cell
-
Archaea and gives energy to cell
-
Bacteria and gives strength to structure
-
Archaea and gives strength to structure
-
Bacteria and assists with growth
Pregunta 5
Pregunta
Which of the following is NOT the basic shape of the bacteria?
Respuesta
-
Rod shape
-
Square shape
-
Comma shape
-
Spiral shape
Pregunta 6
Pregunta
Which of the following organisms have thick peptidoglycan in their cell wall?
Respuesta
-
Gram-negative bacteria
-
Gram-positive bacteria
-
Yeast
-
Moulds
-
Prion
Pregunta 7
Pregunta
Each of the following statements concerning the Gram stain is correct except:
Respuesta
-
Escherichia coli stains pink because it has a thin peptidoglycan layer
-
Streptococcus pyogens stains blue because it has a thick peptidoglycan layer
-
Mycoplasma pneumoniae is not visible in the Gram’s stain because it does not have a cell wall
-
Mycobacterium tuberculosis stains blue because it has a thick lipid layer
-
Escherichia coli stains pink because it has a thick peptidoglycan layer
Pregunta 8
Pregunta
Which among the following are produced by microorganisms?
Respuesta
-
Fermented dairy products
-
Breads
-
Alcoholic beverages
-
All of the above
Pregunta 9
Pregunta
Type strain is used for referring to?
Respuesta
-
Species
-
Genus
-
Family
-
Division
Pregunta 10
Pregunta
The correct order of taxonomic groups from higher to lower rank is?
Respuesta
-
Kingdom—Order—Class—Family
-
Order—Class—Division—Family—Genus—Species
-
Kingdom—Order—Division—Family—Class—Genus—Species
-
Kingdom—Division—Class—Order—Family—Genus—Species
-
Order—genus—Class—Family—Division—Kingdom
Pregunta 11
Pregunta
What are ribosomes composed of?
Respuesta
-
Proteins
-
Proteins and DNA
-
DNA
-
RNA
-
Proteins and RNA
Pregunta 12
Pregunta
What is the correct order of staining reagents in Gram-Staining?
Respuesta
-
Crystal violet, alcohol, iodine solution, safranin
-
Crystal violet, iodine solution, safranin, alcohol
-
Crystal violet, iodine solution, alcohol, safranin
-
Crystal violet, safranin, alcohol, iodine solution
-
Iodine solution, crystal violet, alcohol, safranin
Pregunta 13
Pregunta
Which bacteria appears purple-violet colour after staining?
Respuesta
-
Gram-positive
-
Gram-negative
-
Niether
-
Both Gram-positive and Gram-negative
-
Neither Gram-positive nor Gram-negative
Pregunta 14
Pregunta
Which of the following are true for Gram-negative bacteria?
Respuesta
-
Upon alcohol treatment, the permeability of the cell wall increases
-
Crystal violet-iodine (CV-I) complex is extracted
-
Pore size decreases and the CV-I complex cannot be extracted
-
Alcohol treatment increases the permeability of the cell wall and the CV-I complex can be extracted
-
Upon alcohol treatment, the permeability of the cell wall decreases
Pregunta 15
Pregunta
Which of the staining technique helps in demonstrating spore structure in bacteria as well as free spores?
Respuesta
-
Acid-fast stain
-
Endospore stain
-
Capsule stain
-
Flagella stain
-
Blood stain
Pregunta 16
Pregunta
In Gram-staining, iodine is used as a______________
Respuesta
-
Fixative
-
Mordant
-
Solubilizer
-
unsolubilizer
-
Stain
Pregunta 17
Pregunta
Which of the following is the example of Gram-negative bacteria?
Respuesta
-
Lactobacillus
-
Eschericia coli
-
Staphylococcus aureus
-
Bacillus subtilis
Pregunta 18
Pregunta
Peptidoglycan layer is present in large quantity in?
Respuesta
-
Algae
-
Fungi
-
Gram-negative bacteria
-
Gram-positive bacteria
-
Archaea
Pregunta 19
Pregunta
The outer membarane of the Gram-negative cell wall is anchored to the underlying peptidoglycan by means of which of the following?
Respuesta
-
Braun’s Lipoprotein
-
Sugars
-
Phospholipids
-
Lipopolysaccharide
-
Proteins
Pregunta 20
Pregunta
The organisms which can use reduced inorganic compounds as electron donors are known
as _________
Respuesta
-
Chemotrophs
-
Euryarchaeota
-
Organotrophs
-
Lithotrophs
-
Phototrophs
Pregunta 21
Pregunta
The organisms which obtain energy by the oxidation of electron donor
are ________
Respuesta
-
Eukaryotes
-
Lichen
-
Crenarchaeota
-
Virus
-
Chemotrophs
Pregunta 22
Pregunta
Autotrophs are consumers. E.g. dogs, birds, fish and humans.
Respuesta
- True
- False
Pregunta 23
Pregunta
Halophiles thrive in high salt conditions
Respuesta
- True
- False
Pregunta 24
Pregunta
Psychrophiles thrive in high temperatures.
Respuesta
- True
- False
Pregunta 25
Pregunta
What is the conversion of carbon-containing molecules and nutrients into organic matter and uses oxidation of inorganic compounds as a source of energy?
Respuesta
-
Endocytosis
-
Phagocytosis
-
Protozoa
-
Binary Fission
-
Chemosythesis
Pregunta 26
Pregunta
Archaea are prokaryotes.
Respuesta
- True
- False
Pregunta 27
Pregunta
Which of the following are functions of water in the culture medium?
Respuesta
-
Nutrients must be in aqueous solution
-
Stable pH level
-
Cofactor of enzymes
-
Provides resistance to sudden transient temperature changes
-
It is a chemical reactant, nutrients must also be present in aqueous solution and provides resistance to sudden temperature changes.
Pregunta 28
Pregunta
Which of the following instrument is used for sterilizing the media after it has been prepared?
Respuesta
-
Autoclave
-
Distilled water
-
Laminar Air Flow Chamber
-
Inoculum Needle
-
Incubator
Pregunta 29
Pregunta
Colony formation can be observed in liquid media broth.
Respuesta
- True
- False
Pregunta 30
Pregunta
The temperature that allows for most rapid growth during a short period of time is known as __________.
Respuesta
-
Minimum Temperature
-
Optimum Temperature
-
Medium Temperature
-
Growth Temperature
-
Maximum Temperature
Pregunta 31
Pregunta
Mesophiles are group of bacteria that grow within the temperature range of?
Respuesta
-
Less than 0 degree Celsius
-
0-20 degree Celsius
-
25-40 degree Celsius
-
45-60 degree Celsius
-
More than 60 degree Celsius
Pregunta 32
Pregunta
The bacterium Staphylococcus aureus is which type of bacteria?
Respuesta
-
Psychrophile
-
Mesophile
-
Thermophile
-
Mesophile and psychrophile
-
Neutrophile
Pregunta 33
Pregunta
Microaerophilic bacteria require low levels of oxygen for growth.
Respuesta
- True
- False
Pregunta 34
Pregunta
Which of the following is a function of phosphates used in the preparation of media?
Respuesta
-
They act as buffer
-
Nothing
-
Source of phosphorous
-
Act as “reserve alkali”
-
They act as buffer and is a source of phosphorous
Pregunta 35
Pregunta
The optimum pH for the growth of most bacteria lies between_______
Respuesta
-
5 - 9
-
6.5 - 7.5
-
2 - 3.5
-
9 - 9.5
-
4 - 5
Pregunta 36
Pregunta
Growth of bacteria or microorganisms refer to __________________.
Respuesta
-
Glucose cello-logy
-
An increase in the size of an individual organism
-
An increase in the mass of an individual organism
-
Changes in the total population
-
An increase in number of cells
Pregunta 37
Pregunta
Transverse binary fission requires the formation of a crosswall(septum).
Respuesta
- True
- False
Pregunta 38
Pregunta
The synthesis of new membrane material during reproduction in Gram-positive cells is performed by which of the following organelles?
Respuesta
-
Nucleus
-
Mesosome
-
Endoplasmic Reticulum
-
Cytoplasmic membrane
-
Ribosome
Pregunta 39
Pregunta
When septum formation occurs near the pole of cell then it results in the formation of daughter cell known as _________
Respuesta
-
Microcell
-
Macrocell
-
Minicell
-
Daughter cell
-
New cell
Pregunta 40
Pregunta
Which of the following does not occur during binary fission in bacteria?
Respuesta
-
Chromosome separation
-
Cell elongation
-
Cytokinesis
-
DNA duplication
-
Spindle formation
Pregunta 41
Pregunta
The portion of the growth curve where a rapid growth of bacteria is observed is known as ____________
Respuesta
-
Lag phase
-
Logarithmic phase
-
Stationary phase
-
Decline phase
-
Improvement phase
Pregunta 42
Pregunta
Lag phase is also known as ___________
Respuesta
-
Period of initial adjustment
-
Transitional period
-
Generation time
-
Period of rapid growth
-
Pausing
Pregunta 43
Pregunta
In which of the following phase secondary metabolites are produced during growth?
Respuesta
-
Lag phase
-
Log/Exponential phase
-
Stationary phase
-
Death phase
Pregunta 44
Pregunta
Which of the following is an indirect method for measuring bacterial growth?
Respuesta
-
Cell count
-
Cell mass
-
Cell activity
-
Both Cell mass and Cell activity
-
Cell size
Pregunta 45
Pregunta
Isolation of pure culture refers to ___________
Respuesta
-
Purification of culture
-
Trapping all microorganisms
-
Introduction of inoculum
-
Separation of a single colony
-
To grow microorganisms on a surface
Pregunta 46
Pregunta
Enrichment media allows the growth of a large number of varied bacterial species
Respuesta
- True
- False
Pregunta 47
Pregunta
A large cluster of colonies are obtained in streak plate method.
Respuesta
- True
- False
Pregunta 48
Pregunta
The respiratory chain of bacteria is associated with the _____________
Respuesta
-
Mitochondrial membrane
-
Cytoplasmic membrane
-
Cell wall
-
Cytoplasm
-
Ribosome
Pregunta 49
Pregunta
Safranin will stain bacterial cells blue
Respuesta
- True
- False
Pregunta 50
Pregunta
Cocci is spherical shaped.
Respuesta
- True
- False
Pregunta 51
Pregunta
Protozoa is colourless
Respuesta
- True
- False
Pregunta 52
Pregunta
What does protozoa use to obtain nutrients?
Respuesta
-
Osmosis
-
Photosynthesis
-
Chemosynthesis
-
Phagocytosis
-
Passive transport
Pregunta 53
Pregunta
Fungi have a cell wall
Respuesta
- True
- False
Pregunta 54
Pregunta
Viruses of bacteria that can kill and lyse the bacteria they infect are called _________
Respuesta
-
Lichen
-
Infections
-
Vaccination
-
Anti-microphile
-
Bacteriophage
Pregunta 55
Pregunta
Protozoa are eukaryotes
Respuesta
- True
- False
Pregunta 56
Pregunta
Whats made up of single types of protein subunits stacked around a central axis. (E.g. Tobacco mosaic virus.)
Respuesta
-
Polyhedral
-
Helical
-
Complex
-
Envelop
-
Spherical
Pregunta 57
Pregunta
What virus has a tail?
Respuesta
-
Helical
-
Polyhedral
-
Complex
-
Envelop
-
Spherical
Pregunta 58
Pregunta
Adenovirus is an _______
Respuesta
-
Helical
-
Polyhedral
-
Complex
-
Envelop
-
Spherical
Pregunta 59
Pregunta
Viruses are unicellular
Respuesta
- True
- False
Pregunta 60
Pregunta
Protein synthesis occurs in the Influenza life cycle.
Respuesta
- True
- False
Pregunta 61
Pregunta
Acidophile
Respuesta
-
pH 5 or below
-
pH 6 - 8
-
pH 9+
Pregunta 62
Pregunta
What cannot grow in the presence of oxygen
Respuesta
-
Strict aerobe
-
Strict anaerobe
-
Facultative anaerobes
-
Aero-tolerent anaerobes
-
Micro-aerophile
Pregunta 63
Pregunta
What grows better in the presence of oxygen, but will grow without it?
Respuesta
-
Strict aerobe
-
Strict anaerobe
-
Facultative anaerobes
-
Aero-Tolerant anaerobes
-
Micro-aerophile
Pregunta 64
Pregunta
What depends on oxygen to grow
Respuesta
-
Strict aerobe
-
Strict anaerobe
-
Facultative anaerobes
-
Aero-Tolerant anaerobes
-
Micro-aerophile
Pregunta 65
Pregunta
Gram negative bacteria......
Which statement is wrong?
Respuesta
-
10% of cell wall is peptidoglycan
-
Contains teichoic acid
-
No outer membrane
-
Does not retain crystal violet
-
High lipid/lipoprotein content
Pregunta 66
Pregunta
Gram postive bacteria....
Which answer is wrong?
Respuesta
-
90% of cell wall is peptidoglycan
-
Contains teichoic
-
High lipid/lipoprotein content
-
Retains crystal violet
-
Has outer membrane
Pregunta 67
Pregunta
The function of bacteria capsule is to _________
Respuesta
-
Link amino acids together in the order specified by mRNA.
-
Assit in attaching to other cells and surfaces.
-
Help bacteria move towards nutrients and away from toxic chemicals.
-
Keep bacterium from drying out and protects from phagocytosis.
-
Regulate passage of substances in and out of cell.
Pregunta 68
Pregunta
The function of bacteria pilli is to _________
Respuesta
-
Link amino acids together in the order specified by mRNA.
-
Assit in attaching to other cells and surfaces.
-
Help bacteria move towards nutrients and away from toxic chemicals.
-
Keep bacterium from drying out and protects from phagocytosis.
-
Regulate passage of substances in and out of cell.
Pregunta 69
Pregunta
Bacterial life cycle is an asexual process
Respuesta
- True
- False
Pregunta 70
Pregunta
Lysozymes in tears kills ________.
Respuesta
-
Infection
-
Viruses
-
Moulds
-
Gram-positive bacteria
-
Gram-negative bacteria
Pregunta 71
Pregunta
Influenze virus is polyhedral
Respuesta
- True
- False
Pregunta 72
Pregunta
Adenovirus is polyhedral.
Respuesta
- True
- False
Pregunta 73
Pregunta
Bacteria from a pure culture which is used to start a new culture is called __________?
Respuesta
-
Spreading
-
Agar
-
Gram negative
-
Gram postive
-
Inoculum
Pregunta 74
Pregunta
Enveloped viruses are less sensitive to drying/heating conditions rather than naked capsid viruses.
Respuesta
- True
- False
Pregunta 75
Pregunta
The naked capsid virus is more hostile compared to the enveloped virus due to it breaking down the cell membrane through lysis.
Respuesta
- True
- False
Pregunta 76
Pregunta
In the virus life cycle, an active, intracellular stage is called the __________ stage.
Respuesta
-
Metabolic
-
Infectious
-
Log
-
Attachment
-
Biosynthesis
Pregunta 77
Pregunta
The area of no growth is what we call a ____________
Respuesta
-
Viral plaque
-
Complex
-
Plaque assay
-
Inoculum
-
Spec
Pregunta 78
Pregunta
Where would you find a prophage?
Respuesta
-
Virus life cycle
-
Lytic life cycle
-
Lysogenic life cycle
-
Bacterial life cycle
-
Food life cycle
Pregunta 79
Pregunta
Another word for lytic is [blank_start]virulent[blank_end]
Respuesta
-
virulent
Pregunta 80
Pregunta
Another word for lysogenic is [blank_start]temperate[blank_end].
Respuesta
-
temperate
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