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Question-1
A few organisms are known to grow and multiply
at temperatures of 100-105°C. They belong to
(A)
thermophilic sulphur bacteria
(B)
hot spring blue-green algae
(C)
methanogenic archaebacteria
(D)
marine archaebacteria.
Question-2
The main difference in Gram (-{-)ve and Gram
(—)ve bacteria resides in their
(A)
cell wall
(B)
cell membrane
(C)
cytoplasm
(D)
flagella.
Question-3
Bacteria lack alternation of generation because there is
(A)
neither syngamy nor reduction division
(B)
distinct chromosomes are absent
(C)
no conjugation
(D)
no exchange of genetic material.
Question-4
What are the sex organs provided in some bacteria?
(A)
sex pili
(B)
plasmid
(C)
circular DNA
(D)
gametes.
Question-5
In bacteria, plasmid is
(A)
extra chromosomal material
(B)
main DNA
(C)
non functional DNA
(D)
repetitive gene.
Question-6
Transduction in bacteria is mediated by
(A)
plasmid vectors
(B)
phage vectors
(C)
cosmids
(D)
F-factors.
Question-7
Which of the following is free-living aerobic non- ph otosynthetic nitrogen-fixing bacterium?
(A)
Nostoc
(B)
Azospirillum
(C)
Rhizobium
(D)
Azotobacter.
Question-8
E.coli is
The hereditary material present in the bacterium
(A)
single-stranded DNA
(B)
double-stranded DNA
(C)
DNA
(D)
RNA.
Question-9
A large number decomposed by
of organic compounds can be
decomposed by
(A)
Azotobacter
(B)
chemolithotrophs
(C)
Mycoplasma
(D)
Pseudomonas.
Question-10
A non-photosynthetic aerobic nitrogen fixing soil
bacterium is
(A)
Rhizobium
(B)
Clostridium
(C)
Azotobacter
(D)
Kiebsiella.
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Plus 2 Biology Science
CBSE
Practice in Related Chapters
Plant Reproduction
Animal Tissue
Kingdom Monera
Plant Kingdom
Biological Classification
General Biology
Respiratory System
Digestive System And Nutrition
Circulatory System and Immunity
Plant Morphology
Plant Anatomy
Cell Reproduction
Human Genetics & Genetic Disorders
Mendelian & Postmendelian Genetics
Genes & Chromosomes
Biomolecules
Enzymes
Cell Respiration
Cell Respiration
Kingdom Fungi
Aging And Death
Common Human Diseases
Evolution
Drug And Addiction
Reproduction And Embryonic Development
Endocrine System
Excretion And Osmoregulation
Nervous System & Sense Organs
Musculo-Skeletal System
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