Bacteria are no more classified as plants primarily because:

1. These are unicellular and prokaryotic
2. These are motile
3. Many of them are parasitic
4. They have no chlorophyll

A particular species of which one of the following, is the source bacterium of the antibiotic, discovered next to penicillin, for the treatment of tuberculosis?

1. Escherichia
2. Streptomyces
3. Rhizobium
4. Nitrobacter

Which bacteria fixes nitrogen in the soil?

1. Nitrobacter
2. Nitrosomonas
3. Rhizobium
4. Clostridium

Cell wall of bacteria is composed of:

1. Cellulose
2. Peptidoglycan
3. Glycogen
4. Lipoproteins