Question

The method of growing microorganism as a thin layer on a nutrient medium is known as.
A. Thin Layer Growth
B. Support Growth System
C. Suspended Growth
D. None of these

Answer 1

A microbial culture or microbiological culture is a method of multiplying microorganisms by allowing them to reproduce in predetermined culture medium under controlled laboratory conditions.

Complete answer: Microbiological cultures can be grown in a petri dish of different sizes that contain a thin layer of agar-based growth medium. Another method of bacterial culture is liquid culture. In this method, desired bacteria are suspended in a liquid broth, i.e. a nutrient medium. These are ideal for the preparation of antimicrobial assay. There are several types of bacterial cultures, such as broth culture, agar plates, stab cultures, etc. The method of growing microorganisms as a thin layer on a nutrient medium is known as the support growth system.
a) Thin layer growth: A thin film is a layer of material ranging from fractions of a nanometer (monolayer) to several micrometres in thickness. It involves the controlled synthesis of materials as thin films and its fundamental step in many applications.
b) Support growth system: It refers to a process in which microbes are grown on a thin layer of nutrient medium. The nutrient medium provides various nutrients required by a microorganism to carry out metabolic activities. The nutrient supports the growth of a wide range of microbes.
c) Suspended Growth: The suspended growth system freely suspends microbes in water. They make use of a biological treatment process in which microorganisms are maintained in suspension.
Hence, the correct answer is option B.

Note: Microbial cultures are used to determine the type of organism and abundance of the organism in the sample being tested or both. It is one of the primary diagnostic methods which is used as a tool to determine the cause of infectious diseases by letting the agent multiply in the culture medium.