Screening of industrial Microorganisms

Q.1: Screening of microorganisms includes .

• Done in one or few steps

• Allow discarding of many valueless microbes

• Easy detection of the small percentage of useful microorganism

• All of the above

Primary screening of organic acids or amines producing organisms is done by

• Crowded plate technique

• Dye such as neutral red or bromothymol blue is used

• Enrichment culture Technique

• Auxanographic method

Antibiotic producing microorganisms can be detected by the method

• Incorporation of CaCO3 in the agar medium

• Crowded plate method

• Indicator Dye Method

• None of the above

Secondary screening can give information about ...........

• The genetic instability in microbial cultures

• Number of products produced in a single fermentation

• The structure of product

• All of the above

Secondary screening helps in detecting really useful microorganisms in fermentation processes, which includes..........

• Detection and isolation of microorganisms that possess potentially interesting industrial application

• Enrichment culture technique

• It helps in providing information regarding the product yield potentials of different isolates

• A and B both

What type of mutation happens to just one base.

• Chromosome Mutation

• Point Mutation

• DNA Mutation

• Deletion Mutation

What is it called when a point mutation messes up several amino acids?

• Chromosomal Mutation

• Reading Frame Mutation

• Frameshift Mutation

• Amino Acid Mutation

What is a mutation?

• A change in a chromosomal region.

• A negative change in the nucleotide sequence of DNA.

• A change in one base pair in DNA.

• Any change in the nucleotide sequence of DNA.

When do mutations occur?

• During DNA replication.

• During protein synthesis.

• A mutation can occur any time.

• Induced by chemical or physical mutagens

What is mutagenesis?

• Multiple mutations.

• The production of mutations.

• Mutations that are gene specific.

• The study of mutations.