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.
There are many sources of energy. In The Energy Story, we will look at the energy that makes our world work. Energy is an important part of our daily lives.The forms of energy we will look at include: 1  Electricity. 2  Biomass Energy-energy from plants. 3  Geothermal Energy. 4  Fossil Fuels-Coal, Oil and Natural Gas. 5  Hydro Power and Ocean Energy. 6  Nuclear Energy. 7  Solar Energy.nergy is one of the most fundamental parts of our universe. We use energy to do work. Energy lights our cities. Energy powers our vehicles, trains, planes and rockets. Energy warms our homes, cooks our food, plays our music, gives us pictures on television.