3. Phosphate. In the DNA strand the phosphate groups alternate with deoxyribose. Each phosphate group is joined to carbon atom 3â of one deoxyribose and to carbon atom 5â of another. Thus each strand has a 3â end and a 5â end.The two strands are oriented in opposite directions.he DNA molecule is a polymer consisting of several thousand pairs of nucleotide monomers. Each nucleotide consists of the pentose sugar deoxyribose, a phosphate group and a nitrogenous base which may be either a purine or a pyrimidine. Deoxyribose and a nitrogenous base together form a nucleoside.
Renewable energy is too expensive. [Wind energy] is a more expensive way of producing energy than the alternative. (David Montgomery). Due to its abundance and low market price, coal combustion is the largest source of energy production in the world, accounting for 40% of all electricity worldwide.
The Future Is Now. I n the near future, wind energy will be the most cost effective source of electrical power. In fact, a good case can be made for saying that it already has achieved this status.t's difficult to accurately compare the costs of wind plants and fossil fuel plants because the cost drivers are so different. Low installed-cost-per-kilowatt figures for wind turbines are somewhat misleading because of the low capacity factor of wind turbines relative to coal and other fossil-fueled power plants.