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English I
Physics
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Biology
Mathematics
English II
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Question-1
The main difference in Gram(+)
ve
and Gram (-)
ve
bacteria resides in their
(A)
cell wall
(B)
cell membrane
(C)
cytoplasm
(D)
flagella
Question-2
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-3
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
Question-4
The bacterium (
Clostridium; botulinum
) that causes botulism is
(A)
a facultative anaerobe
(B)
an obligate anaerobe
(C)
a facultative aerobe
(D)
an obligate aerobe
Question-5
Rickettsiae constitute a group under
(A)
bacteria
(B)
viruses
(C)
independent group between bacteria and viruses
(D)
fungi
Question-6
In bacteria, plasmid is
(A)
extra-chromosomal material
(B)
main DNA
(C)
non-functional DNA
(D)
repetitive gene
Question-7
Genophore bacterial genome or nucleoid is made of
(A)
histones and nonhistones
(B)
RNA and histones
(C)
a single double stranded DNA
(D)
a single stranded DNA
Question-8
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-9
T O Diener discovered a
(A)
free infectious RNA
(B)
free infectious DNA
(C)
infectious protein
(D)
bacteriophage
Question-10
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
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Plus 1 Biology Science
ICSE/ISC
Practice in Related Chapters
Nature and Scope of Biology
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Common Human Diseases
Strutural Organizaton of a Cell
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Nature And Scope Of Zoology
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Algae, Bryophytes and Ptertdophytes
Gymnosperms And Angiosperms
Movements And Locomotion
Invertebrata
Introduction To Biotechnology
Vertebreta
Tools of Biology
Kingdom Monera
Kingdom Protista
The living world
Taxonomy
Animal Kingdom
Being Alive What does it Mean?
Anatomy of Plants
Plant- Water Relations
Morphology of Flowering Plants
Taxonomy and Phylogeny
Biomolecules
Cell Division
Continuity of life
Cell Membrane
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