Chemosynthetic autotrophic bacteria does not help in recycling of

1. Nitrogen
2. Iron
3. Sulphur
4. Mangnese 

Chemosynthetic bacteria does not use which inorganic substrate?

1. Nitrites
2. Nitrates
3. Chlorides
4. Both a and b

Chemosynthetic autotrophs derive energy by

1. By sunlight
2. By oxidation of inorganic substances
3. By reduction of inorganic substances
4. By reduction followed by oxidation of inorganic substances

The majority of heterotrophic bacteria are

1. Decomposers
2. Autotrophs
3. Lithotrophs
4. Organotrophs

Lactobacillus comes under which category

1. Autotrophs
2. Lithotrophs
3. Organotrophs
4. Heterotrophs

Leguminous plants have bacteria with which kind of mode of nutrition-

1. Heterotrophs
2. Autotrophs
3. Lithotrophs
4. Organotrophs

Which of the following is not a bacterial disease

1. Citrus canker
2. Cholera
3. Plague
4. Mumps

Which of the following is not a mode of bacterial reproduction?

1. Fission
2. Spore formation
3. Conjugation
4. Fragmentation

Mycoplasma are not possessing which of the following features?

1. Lack cell wall
2. Pleomorphic
3. Can't survive without oxygen
4. Except b all are correct

------- mycoplasma are pathogenic in …….

1. Many, animals and plants
2. All, animals and plants
3. All, animals
4. All, plants