Question

A nutritionalIy wild type organism, which does not require any additional growth supplement is known as ____.

• A. Prototroph
• B. Phenotype
• C. Holotype
• D. Auxotroph

Answer 1

The correct option is A Prototroph

The wild type cells that are capable of utilizing certain nutrients or synthesizing certain compounds and does not require any additional organic nutrients as growth supplements are called prototrophs. Auxotrophs are the mutant cells that are incapable of utilizing certain nutrients or synthesizing certain compounds and hence they can grow on minimal media plus the specific growth supplement for which they are mutant.

For example, a wild type bacteria capable of utilizing lactose as a nutrient source is prototroph (lac+) while its auxotroph would be unable to utilize lactose is denoted lac-. Phenotype is the visible expression of genotype of an organisms. For example, "TT" is the genotype and tall is the associated phenotype. Holotype is the specimen that represents the whole species or designated as type specimen of the species. Thus, the correct answer is option A.