NEETBotanyBiological Classification
Type of Bacteria/Characteristic Description A. Eubacteria 1. Smallest living cells, lack a cell wall B. Cyanobacteria 2. Rigid cell wall, can be motile with a flagellum C. Mycoplasma 3. Photosynthetic autotrophs, can fix atmospheric nitrogen D. Heterotrophic bacteria 4. Decomposers, involved in nitrogen fixation, some are pathogens
Options
- AA - 2, B - 3, C - 1, D - 4
- BA - 3, B - 4, C - 2, D - 1
- CA - 4, B - 1, C - 3, D - 2
- DA - 1, B - 2, C - 4, D - 3
Correct answer
A. A - 2, B - 3, C - 1, D - 4
Step-by-step solution
A - 2: Eubacteria are characterized by a rigid cell wall and, if motile, have a flagellum. These are considered the "true bacteria." B - 3: Cyanobacteria are also known as blue-green algae. They are photosynthetic autotrophs with chlorophyll a and can also fix atmospheric nitrogen in specialized cells called heterocysts (e.g., Nostoc and Anabaena). C - 1: Mycoplasma are unique in that they are the smallest living cells known and lack a cell wall. They can survive without oxygen and many are pathogenic. D - 4: Heter