The main difference between Gram positive and Gram negative bacteria is

Which is the hereditary material in bacteria?

Nitrogen fixing Cyanobacterium is:

Bacteria reproduce primarily by:

A bacterium divides after every 35 min, if a culture containing ${10^5}$cells per mL is grown, then cell concentration per mL after 175 min will be

The rumen of ruminant animals provides a suitable environment for which type of prokaryotes involved in biogas production?

Specialized cells called heterocysts are present in

Plasmids occur in

Lactic acid formation is a two steps anaerobic process. Both steps are carried at one stage by

Murein is not found in the cell wall of

Which one is the most abundant microorganism?