Question

QUESTION 6 Why is agar used in lab, give important properties of agar AND doncribe why it would be important to separate two species of bacteria on by spreading the across a plate as was done in the lab dass TTT Arial 3(126 T E . .

Answer 1

Ams: Agar is used in lab due to its some unique and important properties - 5 important properties of agare are O Solubility: A bility: Agar-agare is insoluble in cold water but dissolues readily in boiling water. Powdered dry agar-agar is soluble in water and other soluents at temperature between 95° to 100°c. Gelling: The ability to form reversible gels by simply cooling hot, aqueous solutions is the most important property of agar-agar. ® Elasticity: It is eladie in mature (938'8%) Melting temperature of agar-agaro is 85-86°C. Lack o hyclrolysis by bacterial exoenzymes is also a very important property of agar. Clo separate two species of bacteria or by separating them across a plate e r important for pure sculture of bacteria. It is done by streaking methodo A pure culture is one that contains only a single kind of microbial population grown from a single cell. By separating two species of bacteria, we can study the specific one species, ty an