Consider the following statements regarding nitrogen-fixing bacteria:

• Statement I: Rhizobium forms a symbiotic association with leguminous plants and fixes nitrogen only within the root nodules.

• Statement II: Alcaligenes species are primarily known as anaerobic chemolithotrophs in the nitrogen cycle.

#Question id: 40484

#Applied Microbiology

Read the following statements regarding the breakdown of the ozone layer:

Statement I: UV radiation acts upon Chlorofluorocarbons (CFCs) in the stratosphere to release active Chloride radicals.

Statement II: A single Chlorine radical is consumed after destroying one Ozone molecule and cannot participate in further reactions.

Which of the options is correct?

#Question id: 40485

#Applied Microbiology

 Consider the following statements about the "Ozone Hole":

1. It is most prominent over the Antarctica region.

2. It forms primarily during the late winter and early spring.

3. The formation of Polar Stratospheric Clouds (PSCs) facilitates the depletion process.

Which of the statements given above are correct?

#Question id: 40486

#Applied Microbiology

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A): The thickness of the ozone layer is measured in Dobson Units (DU).

Reason (R): The ozone layer is found in the Troposphere and protects us from harmful UV-B radiation.

#Question id: 40487

#Applied Microbiology

Match the Chemical/Term (List I) with its description or impact (List II).

#Question id: 40488

#Applied Microbiology

The water activity (aw) of pure water is equal to:

#Question id: 40489

#Applied Microbiology

Which class of microorganisms is specifically adapted to grow in environments with very low water activity (high salt concentration)?