List of top Microbiology Questions

Which method is used to determine the Minimum Inhibitory Concentration (MIC) of an antibiotic?
What is the main structural protein that forms the capsid of a virus?
Which class of MHC molecules is found on the surface of all nucleated cells?
What is the net yield of ATP molecules produced during the glycolysis of one glucose molecule?
Which nitrogen-fixing bacteria forms a symbiotic relationship with the water fern Azolla?
The Baltimore Classification system categorizes viruses based on which characteristic?
Which microorganism is primarily used in the commercial production of Citric Acid?
What is the typical pore size of a membrane filter used to sterilize heat-sensitive liquids?
Which enzyme is responsible for the synthesis of RNA from a DNA template?
What is the name of the process by which bacteria take up naked DNA from their environment?
Which type of antibody is the only one capable of crossing the human placenta?
In the Lac Operon, which molecule acts as an inducer?
Which staining technique is used specifically to identify Mycobacterium tuberculosis?
What is the primary component of the bacterial cell wall that is absent in Archaea?
Which scientist is known as the "Father of Microbiology" for first observing "animalcules"?
HIV is a
Mycoplasmas are different from the other prokaryotes by
Staining material of gram positive bacterium is
Mac-Conkey medium is an example of
The doubling time of {Escherichia coli is 30 minutes in a culture medium containing glucose and yeast extract. Phage T7 has a life cycle of 20 minutes and a burst size of 200 phage per infected {E. coli} cell. Phage absorption is instantaneous and occurs at 1 multiplicity of infection (MOI). Bacteria infected with multiple or single phage give the same burst. 5000 plaque forming units of T7 phage are added to a culture of \( 2 \times 10^7 \) {E. coli} cells. Assuming normal division, the {E. coli} culture will lyse completely by ........ full cycles of bacterial division. (Answer in integer)}
A polymerase chain reaction (PCR) based diagnosis test was performed on a bacterial sample targeting a specific gene. There are 3 copies of this gene in the bacterial genome. Prior to DNA extraction, the bacteria were incubated to allow one cycle of growth. 3072 amplicon copies were obtained after 9 cycles of the PCR. Assume 100% efficiency at each step. The initial bacterial count in the sample was ....... (Answer in integer)
Which of the following bacteria is the most common cause of community-acquired pneumonia?

The doubling time of Escherichia coli is 30 minutes in a culture medium containing glucose and yeast extract. Phage T7 has a life cycle of 20 minutes and a burst size of 200 phage per infected E. coli cell. Phage absorption is instantaneous and occurs at 1 multiplicity of infection (MOI). Bacteria infected with multiple or single phage give the same burst. 5000 plaque forming units of T7 phage are added to a culture of \( 2 \times 10^7 \) E. coli cells. Assuming normal division, the E. coli culture will lyse completely by ........ full cycles of bacterial division. (Answer in integer)}
 

Which option(s) correctly match(es) the structures in a bacterial cell (Column I) with their corresponding functions (Column II)?

The adaptive immune response in an animal involves the generation of antibodies against an invading bacterial pathogen. The following graph represents antibody titer levels in a mammal exposed twice to the pathogen.
Which one of the following options correctly pairs antibodies to peak I and peak II in the graph?