Microorganisms in Air

Which one is more numerous in air

• Bacteria

• Fungi

• Protozoa

• Algae

Air is an unfavourable environment for microorganisms, in which they cannot grow or divide.

• true

• false

Why are the air conditions unfavourable for the microorganisms?

• solar radiation

• deficit of water

• lack of nutients

• all of the above

Which microorganisms are best adapted to a prolonged existence in air?

• spores of fungi

• bacterial spores

• none of the above

• both a&b

Bacterial Endospores are more resistant forma in air.

• because the spores have thick multilayer case

• the spores have more calcium layers

• only A

• both A & B

Which morphological form of Actinomycete is resting stage in air

• conidia

• mycelium

• ascospores

• basidiospores

Which biomolecule protects Bacterial cells from solar radiation?

• Carbohydrates

• DNA

• Carotenoids

• None of the above

How solar radiation kills the bacterial cells in the air?

• Photoreduction

• Photooxidation

• Photosynthesis

• None of the above

Which Bacteria shows resistance while in air?

• Gram positive

• Gram negative

• Bacterial cell without cell wall

• All the above

Which form of viruses show resistance in air?

• non-encapsulated viruses

• encapsulated viruses

• both

• none of the above