Microbiology and Nitrogen Cycle

These include proteases, collagenases and hyaluronidases. For example, Clostridium perfringens produces a potent collagenase, whilst Staphylococcus aureus produces a hyaluronidase.

Bifidobacteria are described as friendly bacteria. They are a probiotic.

This is the correct option. Rhizobium, a bacteria, converts atmospheric nitrogen into a soluble form. They live in the roots of legumes, such as gram, peas, etc.

This is the correct option. Mushroom is a saprotroph as it gets its nutrients in solution form from the dead and decaying matter.

Rhizobium bacteria in the soil cannot make its own food, but can convert atmospheric nitrogen into a soluble form for leguminous plant, which in return provides shelter and food to it.

Yes, it is correct. Bacillus: Endospore forming microbes Sporosarcina: Endospore forming microbes

Archaeoglobus, Desulfobacterium and  Desulfotomaculum use CO₂ from Acetyl-Co A pathway as major C-source.

Yes, it is correct. Veillonella, Peptostreptococcus and Treponema: All are obligate anaerobes.

Yes, it is the correct answer. It has flagella at both sides or ends.

Thiobacterium ferrooxidans is of great economical importance because of their involvement in biological leaching of copper and uranium ores and biooxidation of gold ores.

Yes, it is correct. Escherichia and Paramecium: Neutrophiles (optimum growth between pH 5.5 and 8.0).

Yes, it is correct. Propionibacterium and Treponema are Obligate anaerobes.

Gallionella ferruginea is an iron-oxidising chemolithotrophic bacterium. It oxidises Fe++ as a source of energy for lithoautotrophic growth.

Yes, it is correct. Chlamydomonas nivalis is psychrophile (grows at 0°C and has an optimum growth temperature of 15°C or lower).

Rhizobium bacteria live in the root nodules of leguminous plants and convert atmospheric nitrogen into a form the plant can use.