Bacteria MCQs with Answers

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Bacteria were first discovered by Antonie van Leeuwenhoek, a Dutch scientist who observed them using his handcrafted microscopes in 1676.

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The size of parvovirus is approximately 20 nm, making it one of the smallest known viruses.

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Virus is a non-cellular (acellular) organism because it lacks a cell structure and can only replicate inside a living host cell.

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The bacteria responsible for the formation of curd is Lactobacillus Acidophilus.

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H5N1 is a virus, specifically a subtype of the influenza A virus that causes avian influenza (bird flu).

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Endospores are predominantly produced by Gram positive bacteria, such as Bacillus and Clostridium species.

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The phase of inactive growth where bacteria prepare themselves for division is called the Lag phase.

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Examples of reverse transcribing diploid single-stranded RNA viruses are HIV (Human Immunodeficiency Virus).

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The flexible outer covering of ciliates is called the pellicle.

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Mycoplasma is not a virus; it is a genus of bacteria that lack a cell wall.