Discussion
Members of all the following genera of bacteria are typically found in a maturing Winogradsky column except :
Answer: D
The genus not typically found is Escherichia.
A Winogradsky column of mud, cellulose, sulphate and water develops gradients of oxygen and sulphide, and each zone fills with characteristic soil and mud bacteria. Clostridium ferments cellulose in the anaerobic bottom layers, Desulfovibrio reduces sulphate to sulphide there, and purple non-sulphur bacteria such as Rhodospirillum grow in the middle zone.
Escherichia is an enteric bacterium of animal intestines and is not one of the organisms the column selects for.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development