Biology Multiple Choice Questions on “Biological Classification – Monera”.
1. Monera comprises of prokaryotic organisms like bacteria which are the oldest life forms of the earth. Bacteria are classified based on their shape.
a) True
b) False
Answer: a
Clarification: All the prokaryotic organisms are grouped under Monera. Bacteria are classified based on their shape as Coccus, Bacillus, Vibrium and Spirillum.
2. The bacteria shown in the following picture belongs to the category________
a) Coccus
b) Bacillus
c) Vibrium
d) Spirillum
Answer: d
Clarification: Coccus refers to the spherical shaped bacteria, Bacillus refers to the rod shaped bacteria, Vibrium refers to the comma-shaped bacteria and Spirilla refer to the spiral shaped bacteria.
4. Dunaliella salina belongs to the category of ________
a) Halophiles
b) Thermophiles
c) Hydrophiles
d) Methanogens
Answer: a
Clarification: Dunaliella salina belongs to the category of Halophiles. Halophiles can survive in areas which are highly concentrated in salt. Thermophiles can survive in conditions with high temperature. Methanogens are responsible for production of methane.
5. Methanogens are present in the ______
a) Mouth of cow
b) Guts of cow
c) Respiratory system of cow
d) Ribs of a cow
Answer: b
Clarification: Methanogens are responsible for production of methane. These are present in marshy areas like guts of a cow which helps in production of biogas from cow dung.
6. Archaebacteria can survive in extreme conditions because of the ________
a) complex metabolic reactions in their body
b) fact that they are the oldest life forms on the earth
c) rigid cell wall they have
d) double membrane nucleus
Answer: c
Clarification: Archaebacteria have a rigid cell wall which helps them to survive in extreme conditions like high salt concentration (halophiles) and very high temperature (thermophiles).
7. In chemosynthetic autotrophs energy to prepare food is obtained from __________
a) Light energy
b) Chemical energy
c) Bio-energy
d) Thermal energy
Answer: b
Clarification: Bacteria adopt different modes of nutrition like photosynthetic, chemosynthetic, saprophytic and parasitic. Chemosynthetic autotrophs prepare their own food by obtaining energy from organic substances.
8. Which among the following is incorrect about Cyanobacteria?
a) The word cyano means greenish-blue because of which cyanobacteria is also called as blue-green algae
b) The colour of cyanobacteria is due to presence of chlorophyll
c) Cyanobacteria are chemosynthetic autotrophs
d) Cyanobacteria help in enriching oxygen levels in the atmosphere
Answer: c
Clarification: Cyanobacteria contain chlorophyll which helps to perform photosynthesis and in turn enrich the oxygen levels in the atmosphere. The word “cyano” in cyanobacteria means blue-green algae and therefore they are also called as blue-green algae.
9. Pseudomonas adopt ___________
a) Parasitic mode of nutrition
b) Heterotrophic mode of nutrition
c) Saprophytic mode of nutrition
d) Autotrophic mode of nutrition
Answer: b
Clarification: Parasites obtain food from the host. Heterotrophs obtain food from autotrophs. Saprophytes feed on dead and decay matter. Autotrophs prepare their own food either by using light energy or chemical energy. Pseudomonades are Heterotrophs.
10. Which among the following are incorrect about Mycoplasma?
a) It has rigid cell wall
b) It adopts parasitic mode of nutrition
c) It is present in urogenital tract and blood smears
d) Mycoplasma is the smallest living cell