Procedure: 1  Place 100 ml of homogenizing solution in a beaker heat the solution in a water bath until it reaches 60 C. 2  Mince the onion and add to the solution when it has reached 60 C. Stir and let sit for 15 minutes.3  After the heat treatment, immediately place the beaker into an ice bath for 5 minutes. 4  Pour the contents of the beaker into the 5  ... F The phosphate groups on the outside of DNA carry a negative charge. 2  These negative charges are attracted to and are neutralized by cations such as sodium. 3  When sodium is added to DNA it forms a protective shell around it. 4  On the other hand, protein molecules precipitate from solution in the presence of salt.
In general, a rural area or countryside is a geographic area that is located outside cities and the centers of towns.BI defines rural areas as those areas with a population of less than 49,000 (tier -3 to tier-6 cities). It is generally said that the rural areas house up to 70% of Indiaâs population. Rural India contributes a big chunk to Indiaâs GDP by way of agriculture, self-employment, services, construction etc.
Urban means to do with a town or city. Rural means to do with the countryside. Rural Urban Suburban are also general designations given by the US government agencies (ofte â¦ n used for determining grants and tax incentives).Not all agencies use the exact same population break downs or terms (exam. some may use Metropolitan Areas).n an urban area, it is like a cluster of homes and people, whereas the rural area is more of the out in the country sort. For example, you may have a small yard in the urban â¦ setting, but own a large yard or even many acres in the rural areas. 19 people found this useful.