Which one of the following statement about culture is TRUE?: (A) Agar has nutrient propeies, (B) Chocolate medium is selective medium, (C) Addition of selective substances in a solid medium is called enrichment media, (D) Nutrient broth is a basal medium
Answer is D. Nutrient broth is a type of simple (basal) medium. It consists of peptone, meat extract, sodium chloride and water. Chocolate medium is a type of enriched medium. Addition of selective substance to a liquid medium is called enrichment medium. Ref: Greenwood 14 th Edition, Page 39; Textbook of Microbiology, Ananthanarayan and Paniker, 7th Edition, Chapter 4, Page 37.