Bacteria MCQs with Answers

The virus is:

• A.An obligate intracellular parasite
• B.A free-living unicellular organism
• C.A multicellular prokaryote
• D.An autotrophic microorganism

Past Paper MCQ

Pneumonia is caused by which bacteria?

• A.Cocci
• B.Bacilli
• C.Spirilla
• D.Vibrio

Harmful bacteria that cause bacterial infections and disease are called _?

• A.Autotrophic bacteria
• B.Saprophytic bacteria
• C.Probiotic bacteria
• D.Pathogenic bacteria

Metabolically dormant body produced within the bacterial cell membrane is ?

• A.Plasmid
• B.Cyst
• C.Capsule
• D.Endospore

Which of the following is NOT true about plasmids found in streptococci?

• A.Plasmids are extrachromosomal DNA molecules.
• B.Plasmids can replicate independently of the bacterial chromosome.
• C.The bacterial chromosome depends on plasmids for replication.
• D.Plasmids often carry genes that provide antibiotic resistance.

Bacteria divide at exponential rate during which growth phase?

• A.Lag phase
• B.Log phase
• C.Stationary phase
• D.Death phase

Are many viruses pathogenic?

• A.Yes
• B.No
• C.Only in animals
• D.Only in plants

Example of viruses having a polyhedral capsid that is with 252 capsomeres is _?

• A.Adenovirus
• B.Herpesvirus
• C.Poliovirus
• D.Influenza virus

Cholera is caused by _?

• A.Virus
• B.Bacteria
• C.Fungus
• D.Protozoa

Protozoa are divided into _ classes.

• A.3
• B.6
• C.5
• D.4