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English I
Physics
Chemistry
Biology
Mathematics
English II
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Question-1
For retting of jute the fermenting microbe used is
(A)
methophilic bacteria
(B)
butyric acid bacteria
(C)
Helicobacter pylori
(D)
Streptococcus lactis
Question-2
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 obtained its DNA directly
(D)
Bacteria obtained DNA from other external source
Question-3
The main difference in Gram(+)
ve
and Gram (-)
ve
bacteria resides in their
(A)
cell wall
(B)
cell membrane
(C)
cytoplasm
(D)
flagella
Question-4
A few organisms are known to grow and multiply at temperatures of 100-105
o
C. They belong to
(A)
marine archaebacteria
(B)
thermophilic sulphur bacteria
(C)
hot-spring blue-green algae (cyanobacteria)
(D)
thermophilic, subaerial fungi
Question-5
Non-symbiotic nitrogen fixers are
(A)
Azotobacter
(B)
Pseudomonas
(C)
soil fungi
(D)
blue-green algae
Question-6
Viruses are no more 'alive' than isolated chromosomes because
(A)
both require the environment of a cell to replicate
(B)
they require both RNA and DNA
(C)
they both need food molecules
(D)
they both require oxygen for respiration
Question-7
In bacterial chromosomes, the nucleic acid polymers are
(A)
linear DNA molecule
(B)
circular DNA molecule
(C)
of two types - DNA and RNA
(D)
linear RNA molecule
Question-8
Interferons are
(A)
antiviral proteins
(B)
antibacterial proteins
(C)
anticancer proteins
(D)
complex proteins
Question-9
Which bacteria is utilized in gobar gas plant ?
(A)
Methanogens
(B)
Nitrifying bacteria
(C)
Ammonifying bacteria
(D)
Denitrifying bacteria
Question-10
The hereditary material present in the bacterium
Escherichia coli
is
(A)
single stranded DNA
(B)
deoxyribose sugar
(C)
double stranded DNA
(D)
single stranded RNA
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Plus 1 Biology Science
ICSE/ISC
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