631.
The method of food intake in Amoeba is called
A
Saprophytic
B
Holozoic
C
Holophytic
D
Parasitic
Answer :
Holozoic
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632.
They zygospore in spirogyra is
A
One layered
B
Two-layered
C
Three-layered
D
Multi-layered
Answer :
Three-layered
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633.
Which one of the following statements about viruses is correct?
A
Viruses possess their own metabolic system
B
Viruses contain either DNA or RNA
C
Viruses are facultative parasites
D
Viruses are readily killed by antibiotics
Answer :
Viruses contain either DNA or RNA
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634.
Under optimal conditions of temperature and nutrition, most of the bacteria divide at an interval of
A
24 Hrs
B
20 minutes
C
60 minutes
D
5 minutes
Answer :
20 minutes
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635.
In which form would you find chromatoid bodies in Entamoeba histolytica
A
In Minuta
B
In mature cyst
C
In trophoite
D
In young cyst
Answer :
In Minuta
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636.
Which of the following has only one host
A
P. Vivax
B
Trypanosoma gambiense
C
Taenia solium
D
Entamoeba histolytica
Answer :
Entamoeba histolytica
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637.
Protistan genome has
A
membrane bound nucleoproteins embedded in cytoplasm
B
free nucleic acid aggregates
C
gene containing nucleoproteins condensed together in loose mass
D
nucleoprotein in direct contact with cell substance
Answer :
membrane bound nucleoproteins embedded in cytoplasm
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Protistans are eukaryotes and their genetic material is organised in form of nucleus. DNA is associated with histone protein.
638.
What is true for plasmid
A
Plasmids are widely used in gene transfer
B
These are found in virus
C
Plasmid contain gene for vital activities
D
These are main part of chromosome
Answer :
Plasmids are widely used in gene transfer
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639.
Which bacterium develops flavour and aroma in tea and tabacoo leaves
A
Streptococus lactis
B
Zotobacter
C
Bacillus megatherium
D
Radicicola
Answer :
Bacillus megatherium
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640.
The bacterial genophore is attached to
A
Vessicle
B
Tubule
C
Mesosome
D
Thylakoid
Answer :
Mesosome
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