Explore topic-wise MCQs in Microbiology.

Which of the following is not the characteristic of a growth curve?

The term facultative anaerobe refers to an organism that

Generation time of Escherichia coli is

Generation time is

The microorganisms that grow best in a low-oxygen environment is called a (n)

Pseudomonas pseudoflava can grow as

Which of the following has more tolerance for acidic pH (lower pH)?

Antimicrobial constituents for the microbial growth in foods are

The average size of cells during the exponential phase of growth is

A culture broth tube was very turbid at the surface but clear throughout the rest of the tube indicating that the

The reproduction by budding occur in

A spore differs from an actively replicating bacterium in that the spore

Bacteria and fungi multiply best

An organism has an optimal growth rate when the hydrogen ion concentration is very high. This organism is

Which of the following procedures uses a photocell to measure absorbance of a culture to regulate the flow of culture media?

Organisms, using organic compounds as electron donors are called

The total biomass of an organism will be determined by the nutrient present in the lowest concentration relative to the organism's requirements is a statement of

Which of the following organisms typically get their carbon for biosynthesis from carbon dioxide?

An organism that expends energy to grow in a habitat with a low water activity in order to maintain internal solute concentrations to retain water is

The straightforward method of binary fission explains how bacteria

Lag phase is also known as

Which of the following is used to grow bacterial cultures continuously?

A microbe, which grows at temperatures above 95 C is most likely to be

Some organisms can use reduced inorganic compounds as electron donors and are termed as

The organism which grows best above 45 C are called

The organism which obtain their energy from chemicals are designated as

Nutrient content and biological structures are considered as

Postgates assay technique is useful in determining if a cell is viable even though it is

What are the extrinsic factors for the microbial growth?

The combination of low levels of NaCl, NaNO₃ (sodium nitrate), and slightly acid pH can prevent multiplication and toxin formation of

A culture broth tube was very turbid at the bottom of the tube but clear at the top of the tube indicating that the

In the exponential phase, the cells and cell mass

An organism is completely dependent on atmospheric O₂ for growth. This organism is

The term obligate anaerobe refers to an organism that

All organisms require at least small amounts of carbondioxide, However, some can use CO₂ as their sole source of carbon. Such organisms are termed as

The generation time of a culture that produces two generations per hour is

Autotrophic bacteria are those which

Which of the following organisms typically get their carbon for biosynthesis from organic compounds?

The period between inoculation of bacteria in a culture medium and beginning of multiplication is known as

The term aerotolerant anaerobe refers to an organism that

The equation used to obtain bacterial population by binary fission is

Organisms such as lactobacilli that have elaborate requirements for specific nutrients i.e. vitamins and other growth promoting substances, are generally called as