Answer: Both deoxyribonucleic acid (DNA) and ribonucleic acid (RNA) are made up of nucleotides which consist of three parts: 1  Nitrogenous Base. 2  Purines and pyrimidines are the two categories of nitrogenous bases.3  Pentose Sugar. 4  In DNA, the sugar is 2'-deoxyribose. 5  Phosphate Group. 6  A single phosphate group is PO 4 3- .nswer: Both deoxyribonucleic acid (DNA) and ribonucleic acid (RNA) are made up of nucleotides which consist of three parts: 1  Nitrogenous Base. 2  Purines and pyrimidines are the two categories of nitrogenous bases.
AT A GLANCE: In 1440, German inventor Johannes Gutenberg invented a printing press process that, with refinements and increased mechanization, remained the principal means of printing until the late 20th century.
According to most historians, the printing press was invented by Gutenberg, in Mainz, in the Holy Roman Empire (Germany) in 1441, or about that time. There are many people w â¦ ho disagree over the invention of the printing press, and alternate views have been put forward.here are other claimants to the invention of the printing press, and there are those who say there is evidence that the press may have been invented as early as the 13th century. Woodblock printing was done in Europe before Gutenberg.