1. Archaebacteria can live in some of the most harsh habitats because of
a) Presence of mesosome
b) High power of multiplication
c) Special cell wall structure
d) All of these
Explanation: Archaebacteria can live in some of the most harsh habitats because of special cell wall structure.
2. Following are present in gut of cows and buffaloes and is responsible for the production of
methane from the dung of these animals
a) Methanogen
b) Thermoacidophiles
c) Halophils
d) All of these
Explanation: Methanogen
3. Motile bacteria possess
a) Cilia
b) Flagella
c) Both (a) and (b)
d) None of these
Explanation: Motile bacteria possess flagella.
4. Which of the following statements is true about cyanobacteria?
a) It is found in fresh water only.
b) It may be unicellular, colonial or filamentous.
c) They often form bloom in non-polluted fresh water bodies.
d) Colonies are not surrounded by gelatinous sheath.
Explanation: It may be unicellular, colonial or filamentous.
5. Specialized cell of nostoc and anabaena fix nitrogen are known as
a) Cyst
b) Heterocyst
c) Oocytes
d) Cholecyst
Explanation: Specialized cell of nostoc and anabaena fix nitrogen are known as Heterocyst.
6. Find out the total number of false statements:
A. Cyanobacteria have chlorophyll ‘a’ like green plants.
B. Bacteria which oxidizes various inorganic substance such as nitrates and ammonia and
uses the released energy for ATP production are chemosynthesis autotrophic bacteria.
C. Heterotrophic bacteria are less in abundance in nature.
D. Majority of heterotrophic bacteria are decomposers.
E. Chemosynthetic autotrophic bacteria play an important role in recycling of nutrients like
nitrogen, phosphorus iron and sulphur.
a) 1
b) 2
c) 3
d) 4
Explanation: Only 1 Statement is False
7. Heterotrophic bacteria helps in
a) Curding of milk
b) Production of antibiotic
c) Nitrogen fixation in leguminous plant
d) All of these
Explanation: All of these
8. Select the total number of disease from the following caused by bacteria:
Mumps, Smallpox, Citrus canker, Cholera, Typhoid, Tetanus, Sleeping sickness, Malaria
a) 2
b) 4
c) 5
d) 6
Explanation: 4
9.Which one is correct about reproduction in bacteria?
a) Mainly by binary fission
b) Spores are formed under unfavorable condition
c) Sexual reproduction by transfer of DNA from one to another
d) All of these
Explanation: All of these
10. Following features belong to
A. Complete lacking of cell wall
B. Anaerobic
C. Smallest living cell
D. Many of them are pathogenic to plant and animals
a) Chrysophytes
b) Prions
c) Viroids
d) Mycoplasma
Explanation: Mycoplasma