541.
Which of the following produced non-motile gamete
A
Ulothrix
B
Albugo
C
Riccia
D
Pteridium
Answer :
Albugo
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542.
The bacteria generally used for genetic engineering is
A
Agro bacterium
B
Bacillus
C
Pseudomonas
D
Clostridium
Answer :
Agro bacterium
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543.
Free living nitrogen-fixing bacteria are found in
A
Air
B
Soil
C
Root nodules
D
None of the above
Answer :
Soil
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544.
Which of the following is free replicon
A
Exons
B
Introns
C
Plasmid
D
Hexons
Answer :
Plasmid
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545.
Sexual reproduction absent in
A
Phycomycetes
B
Deuteromycetes
C
Zygomycetes
D
Basidiomycetes
Answer :
Deuteromycetes
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546.
If Amoeba is placed under unfavourble conditions
A
Retracts pseudopodia
B
Forms pseudopodia
C
Undergoes rapid division
D
Remains alive
Answer :
Retracts pseudopodia
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547.
Which of the following is not true for Bacterial cell wall
A
It is made up of mucopeptide
B
It gives shape to bacteria
C
It is not antigenic
D
It is not stainable with simple dye
Answer :
It is not antigenic
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548.
Which of the following shows coiled RNA strand and capsomeres?
A
Polio virus
B
Tobacco masaic virus
C
Measles virus
D
Retrovirus
Answer :
Tobacco masaic virus
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549.
A place was rocky and barren but now there is a green forest, the sequence of origin is
A
Lichen, moss, herbs, shurbs
B
Moss, lichen, herbs, shurbs
C
Lichen, moss, shrubs, herbs
D
Shurbs, herbs, moss lichen
Answer :
Lichen, moss, herbs, shurbs
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550.
Sporulation in Amoeba occurs during
A
Favourable conditions
B
Unfavourable conditions
C
A and B both
D
None of the above
Answer :
Unfavourable conditions
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