Question

Which one of the following is the most suitable medium for the culture of Drosophila Melanogaster?
A) Moist-bread
B) Agar agar
C) Ripe banana
D) Cow dung

Answer 1

Hint: A culture medium is a liquid or gel designed to support the growth of cells, tissues, or organs. A typical animal cell culture medium is composed of a complement of amino acids, vitamins, inorganic salts, glucose, and serum as a source of growth factors, hormones, and attachment factors.  

Complete step-by-step answer:The most suitable medium for the culture of Drosophila melanogaster is the ripe banana. Bananas have a lot of sugar content that is the best source of sugar for the microbes. Drosophila melanogaster is small in size and can’t be seen with naked eyes so the main resource of attraction for them is sugar which it can smell in fruits. 
For the fungus Rhizopus moist bread is used as a culture medium and gelling and solidifying agents are commonly used for preparing semisolid or solid tissue culture media. Agar is a polysaccharide taken from seaweeds, having many profits over other gelling agents. agar-agar is a tissue culture medium. Cow dung is also called cow pats, cow pies, or cow manure. The waste product(feces) of animal species is referred to as cow dung. It behaves as very good manure and it can be cost-effective as well as helpful as panchayat. That improves the fertility of the soil and also improves the quality of earthworms, and promotes the health of the crops as they act as organic fertilizer. And these are the best sources to generate biogas and electricity.
Hence the correct answer is option C.

Note: Natural media consist solely of naturally occurring biological fluids. It is very useful and convenient for a wide range of animal cell cultures. The major disadvantage of natural media Is its poor susceptibility due to a lack of knowledge of the exact composition of these natural media.