Practice General Microbiology questions with answers and explanations.
Choose an option to check your answer.
IgA is the principal antibody isotype in mucosal secretions.
Choose an option to check your answer.
Type IV hypersensitivity is a delayed T-cell mediated immune reaction rather than an antibody-mediated reaction.
Choose an option to check your answer.
Reverse transcriptase is an enzyme used by retroviruses to synthesise DNA from an RNA template.
Choose an option to check your answer.
Acid-fast bacillus is an organism with a lipid-rich cell wall that retains carbol fuchsin after acid-alcohol treatment.
Choose an option to check your answer.
Opportunistic infection is an infection occurring mainly when host defences are impaired.
Choose an option to check your answer.
Normal microbiota is microorganisms that commonly colonise body sites without causing disease under normal conditions.
Choose an option to check your answer.
Vector is a living carrier that transmits an infectious agent between hosts.
Choose an option to check your answer.
Gram-positive cocci is bacteria that retain crystal violet and appear purple because of a thick peptidoglycan wall.
Choose an option to check your answer.
Endospore is a dormant resistant structure formed by selected bacteria such as Bacillus and Clostridium species.
Choose an option to check your answer.
Biofilm is a structured microbial community embedded in a protective extracellular matrix on a surface.
Choose an option to check your answer.
Sterilisation is complete destruction or removal of all forms of microbial life, including spores.
Choose an option to check your answer.
Disinfection is reduction of pathogenic microorganisms on inanimate objects, not necessarily including spores.
