Consider the following: 1. Bacteria 2. Fungi 3. Virus Which of the above can be cultured in artificial/synthetic medium?

Answer: A. BACTERIA (1) and FUNGI (2) can be cultured in artificial/synthetic media; VIRUSES (3) cannot. Microbial CULTURE refers to growing microorganisms in controlled laboratory conditions using specific nutrient media. The capacity to grow on synthetic media depends on metabolic autonomy. (1) BACTERIA: CORRECT. Bacteria are CELLULAR, SELF-REPLICATING organisms with their own metabolic machinery. Most can be grown on ARTIFICIAL MEDIA such as nutrient agar, blood agar, MacConkey agar, LB broth, etc. They obtain energy and carbon from media components (sugars, amino acids, salts). This is the standard practice in microbiology labs. (2) FUNGI: CORRECT. Fungi (moulds, yeasts) are also CELLULAR organisms with metabolic independence and can be grown on synthetic media — Sabouraud Dextrose Agar (SDA), Potato Dextrose Agar (PDA), Czapek-Dox, malt extract media etc. Yeasts grow readily in liquid culture; filamentous fungi grow on solid media. (3) VIRUSES: WRONG. Viruses are OBLIGATE INTRACELLULAR PARASITES — they have NO INDEPENDENT METABOLISM. They cannot replicate outside a living host cell. They lack ribosomes, ATP-generating machinery, and protein synthesis equipment of their own. They depend entirely on host cells to provide all the components they need to assemble new viral particles. To grow viruses for vaccines or diagnostics, scientists use: - LIVE ANIMAL TISSUE CULTURES (Vero cells, HEK293, BHK21, MDCK lines). - EMBRYONATED CHICKEN EGGS (e.g., influenza vaccine production). - WHOLE ANIMALS (rare, for some pathogens). Viruses CANNOT be grown on lifeless synthetic media — this is one of the fundamental distinctions between viruses and other microbes. Source: NCERT Class 11 Biology 'Biological Classification' / Class 12 Biology 'Human Health and Disease'.