111.
Which statement is correct for bacterial transduction?
A
Transfer of some genes from one bacteria to another bacteria through virus
B
Transfer of genes from one bacteria to another bacteria by conjugation
C
Bacteria obtains its DNA directly
D
Bacteria obtains its DNA from other external source
Answer :
Transfer of some genes from one bacteria to another bacteria through virus
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Transduction is virus mediated gene transfer in bacteria.
Notes : Viral transfer of DNA from one bacterium to another is an example of horizontal gene transfer.
112.
A virus can be considered a living organism because it
A
responds to touch stimulus
B
respires
C
reproduces (inside the host)
D
can cause disease
Answer :
reproduces (inside the host)
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113.
Mad cow disease in cattle is caused by an organism which has:
A
Free DNA without protein coat
B
Inert crystalline structure
C
Abnormally folded protein
D
Free RNA without protein coat
Answer :
Abnormally folded protein
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114.
The traditional classification of fungi is based on
A
Reserve food
B
Sexual reproduction
C
Flagella
D
Structure of spores
Answer :
Sexual reproduction
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115.
Similarity between Amoeba and WBC is in
A
Pseudopodia
B
Contractile vacuole
C
Encystment
D
All of the above
Answer :
Pseudopodia
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116.
Hypertrophy of florat parts in a cruciferous plant is caused by
A
Conidia of cystopus
B
Conidiophores of cystopus
C
Accumulation of hyphae of cytopus for sexual reproduction
D
All of the above
Answer :
Accumulation of hyphae of cytopus for sexual reproduction
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117.
Thin thread like bacteria which appears like fungal hyphae called
A
Spirillum
B
Bacillus
C
Actinomycetes
D
Cocci
Answer :
Actinomycetes
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118.
Botanical name of species which cause white rust of cruciferae
A
Peronospora Parasitica
B
Puccinia graminis
C
Pythium debarbanum
D
Albugo candida
Answer :
Albugo candida
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119.
Diatoms perform which type of movement in water
A
Swimming
B
Amoeboid
C
Floating
D
Ciliary
Answer :
Floating
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120.
When the pond is going to dry Amoeba will
A
Show no change
B
Feeds quickly
C
Encysts
D
Divides by binary fission
Answer :
Encysts
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