Question

Which of the following bacteria is found in Ganga water?
A) Coliform bacteria
B) Streptococcus bacteria
C) Staphylococcus bacteria
D) Diplococcus bacteria

Answer 1

Hint:Bacteria are small microscopic organisms which can live both inside and outside a host They are single celled organisms and have the capacity to survive even under harsh conditions.

Complete answer:
Let us first know a little more about bacteria. The structure of bacteria is pretty simple and they have no cellular organelles, hence called prokaryotic organisms. Their cell wall is made up of peptidoglycan, they have flagella as their locomotory organ. Bacteria can be classified into various classes based on,
>Their shape - Rod, spiral, sphere or comma shaped.
>Their mode of nutrition - Heterotrophic or autotrophic.
>Their cell wall composition - Lipopolysaccharide cell wall or peptidoglycan cell wall.
>Their mode of respiration - Aerobic or anaerobic.

>Option A: The holy Ganga water has traces of faecal coliform for over 12 years. The most probable number count of the bacteria is 100,000,000 MPN per 100 mL. Such a high MPN count makes the ganga water unfit for taking bath and consumption. Therefore, this is the correct option.

>Option B, C and D: No traces of Streptococcus, Staphylococcus and Diplococcus bacteria is seen in ganga water. Therefore, this is the incorrect option.

Additional information: Bacteria can also be classified on the basis of the type of environment they live in,
>Cryophiles
>Barophiles
>Thermophiles
>Alkaliphiles
>Osmophiles

Hence the correct answer is option ‘A’.

Note:Coliform bacteria is generally found in feces of warm blood humans and animals. It is a comparatively safe organism at low levels, as it does not cause any disease.