Microorganisms Free Question Bank
Which type of DNA is found in bacteria?
A Helical DNAB Membrane bound DNA
C Straight DNA
D Circular free DNA
E NA
Plasmids are most often found in
A VirusB Bacteria
C Fungi
D Viroid
E NA
Cell wall of Gram positive bacteria is made up of
A MureinB Cellulose
C Lipid and protein
D Cellulose and lipid
E NA
Bacteria with flagella all over the body is
A PeritrichousB Amphitrichous
C Monotrichous
D None of these
E NA
Which of the following is a free living nitrogen fixing bacterium present in the soil?
A AzotobacterB Rhizobium
C Nitrosomonas
D Pseudomonas
E NA
What is true about Archaebacteria?
A All fossilsB All photosynthetic
C All Halophiles
D Oldest living beings
E NA
The Ti plasmid is often used for making transgenic plants. This plasmid is found in
A Yeast as a 2 μm plasmidB Agrobacterium
C Rhizobium of the roots of leguminous plants
D Azotobacter
E NA
Reproduction in most of the bacteria is by a process known as
A Binary fissionB Budding
C Sexual
D Sporulation
E NA
An example of endomycorrhizal is
A AgaricusB Glomus
C Nostoc
D Rhizobium
E NA
Human insulin is being commercially produced from a transgenic species of
A EscherichiaB Saccharomyces
C Rhizobium
D Mycobacterium
E NA
The genetic material in virus is
A DNA and RNAB RNA only
C DNA only
D DNA or RNA
E NA
Protein coat of a virus enclosing nucleic acid is called
A VectorB Capsid
C Plasmid
D Genome
E NA
The Phages that show lysogenic cycle are called
A Lytic phagesB Virulent phages
C Temperate phages
D None of these
E NA
Which one of the following enzymes is present in the bacteriophage?
A Succinic dehydrogenaseB Lysozyme
C Protease
D Urease
E NA
Which one of the following viruses contains both DNA and RNA?
A CyanophageB Herpes Virus
C Leuko Virus
D Polio Virus
E NA
dsRNA is found in
A Influenza virusB Retrovirus
C Reovirus
D TMP
E NA
Which one of the followings is a viral disease?
A Wilting of cabbageB Leaf roll of potato
C Red rot of sugar cane
D Damping-off disease of seedlings
E NA
Cauliflower mosaic virus contains
A ds DNAB ds RNA
C ss RNA
D ss DNA
E NA
ELISA is used to detect viruses where the key reagent is
A DNA probeB Catalase
C Alkaline phosphatase
D RNase
E NA
Due to discovery of which of the following in 1980, the evolution was termed as RNA world
A RNA have enzymatic propertyB In some virus RNA is genetic material
C m-RNA, t-RNA- r-RNA synthesize proteins
D RNA is not found in all cells
E NA
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