BIOL 1107 Chapter Notes - Chapter 4: The Double Helix, Adenosine Triphosphate, Nitrogenous Base
Document Summary
The phosphate is bonded to the sugar molecule, which in turn is bonded to the. Although a wide variety of nucleotides are found in living cells, origin-of-life researchers concentrate on two types: ribonucleotides, the monomers of ribonucleic acid (rna), and deoxyribonucleotides, the monomers of deoxyribonucleic acid (dna). In ribonucleotides, the sugar is ribose: deoxyribonucleotides, it is deoxyribose. Ribose has an -oh group bonded to the 2" carbon. Deoxyribose has an h instead at the same location. In both of these sugars, an -oh group is bonded to the 3" carbon. Chapter 4 - nucleic acids and the rna world. Rna world hypothesis - life began as a polymer called a nucleic acid specifically rna (ribonucleic acid). Chemical evolution led to the existence of an rna molecule that could replicate itself. Once this molecule existed, chance errors in the copying process created variations that would undergo natural selection. Nucleic acids are polymers made up of nucleotides. three components of a nucleotide:
